49:17 "It's getting late. I'm tired. This is when mistakes happen." This quote should be noted as it is knownledge to live by. Not only pertaining to gold refining but just in general. Stay safe everyone!
It would be cool to see a video explaining the cost to profit ratio. Like how much you spend on chemicals, electricity, and metals compared to the value of the finished product.
I believe it is negative. The scrap metal cost is fixed at scrap value. The refining costs are expensive. If you add up the two costs it is a big loss. Also, a percentage of the scrap material is lost during refining. The gold value in dollars per weight is the same regardless of purity. I don't think the cost in dollars is his mission. The silver from karat scrap is very profitable IMHO. 👍 The costs of equipment repairs, replacements, and upgrades and now replacements again, has been significant.
-That white gold in your 14k portion is Rh plated. -You could use the Au electroplated material to inquart. The Au is plated on brass, which is Ni and then Au electroplated. Just assume that all the electroplated weight is 'inquart.' You'd be adding in the same Cu and Zn that's part of your Au filled material. -That junk metal is 'brass' or 'Zn diecast', that is zincate immersion (Na2ZnO3) coated, Cu flashed, Cu plated, Ni flashed, then Au flashed. Zn is just as useful to inquart as Cu or Ag. It all comes out when you do your HNO3 boils. -The material at the bottom of your melt dish is likely stainless steel. -I'm surprised at how little slag you have floating on top. That'd be your Zn or maybe Pb oxides. Looks like they might have been rinsed out into the drain when you spatter cast your melt into the cooling water tank. -The activity series isn't going to predict reactivity with acid. If anything, the reaction you got would be from the amount of Cu and Zn in the inquarted gold. Whatever Zn you add to your process will pas all the way through to your final Fe waste stream and be discharged in any liquid supernate. -Jeez. I didn't even consider Sn. -That white sediment on the bottom of the beaker, after the HCl boil, is your PbSO4. -Double, triple or even quadruple up on your filter paper for the Buchner funnel. In the old days, we'd use an asbestos fiber filter mat. I'd think you could use an activated carbon layer on top of the filter papers to help you get your clear solution. Of course, you'd need to add the carbon to your filter paper stash for later metal recovery. Yes, the filtration step will be slow, but less sensitive to high pressure vacuum. That IS nice Au! Long road to well done!
Mr. Foote. Thank you for the lesson of the day. You answered my ?’s and I’m sure some of SREETIPS’ as well. Keep posting here please. I’ll be watching for my next lesson sir. 😊
There is nothing... and I mean NOTHING.. like the feeling of PURE GOLD.. in the palm of your hand. Always love hearing you say that. Beautiful gold bar and great pour lines. Thanks for uploading.
Beautifully done. Stepping into something new, having it act in a very unexpected way, and you made the great save. Thanks for sharing. Steady wins the race.
36:39 You no need to waste hydrochloric acid for silver test. Use for it medium to high saturated solution of sodium chloride (cooking salt times cheaper than muriatic acid). And salt will not rise acidity of solution, but gives same precipitation result as acid. 36:50 That green cloud is copper dichloride (CuCl2) and possibly zinc tetrachlorocuprate (Zn[CuCl4]), both salts quite unstable(especially second) in nitric acid or it's salts solutions 43:44 Nasty ortostannic acid (or fine tin oxide, from G.F. material) clogging filters in minutes or go though it if not fine enough. Using filter "sandwich" will help alittle. Filter Sandwich from top to bottom: rude filter (cotton pad), semifine filter/filters(quick and/or medium flow class) and fine filter (slow flow class a.k.a. "blue tape"). To prevent forming tin oxide add citric acid as inhibitor (about 24 gram per 100 ml HNO3) and avoid to heat solution above 50°C. 53:46 forgot stannous chloride test
About that silver test, I'd say it is inconclusive, led chloride will also precipitate. The way to distinguish led and silver is to take a bit of that precipitate, (try to) dissolve it in ammonia and add some potassium iodide. Led chloride won't dissolve in ammonia and silver iodide will give a nice, bright yellow precipitate.
@@apveening Lead chloride precipitate only in concentrated solutions, in diluted solution it's redissolves. Solubility difference between lead and silver chlorides is significant: for PbCl2 is about 1gram per 100ml (at 25°C), and for AgCl is about 20micrograms per 100ml (or 0.2gram per tonne)
Twenty years of oil field machining with many late nights on a big lathe because everyone is waiting on ya! I’m surprised I’m not dead. Thanks for sharing and I did learn something.
I did twenty years in the Navy. I remember waiting on the MR (machinery repairman) to cut new wearing rings for one of the fresh water pumps on the distilling plant. We had no water to take showers while underway until he got them rings cut. Them the whole ship was waiting on us to reassemble the pump and get the evaps back up and running so they could wash up. But that’s ok, I work better under pressure.
Thank yoy sir again. This was very informative as initially I was like wow that’s really smart. Until I saw the results now I know not worth the hassle. Thank you.
I love the chemistry of every one of your refineries. I read, liked all your comments. I agree with everything you mentioned. Keep up the good work & keep putting out this content. I've learned a lot from you. Thank you!
Excellent video once again thank you 😊 the struggle is real with the filtering process!!! I play with Escrap only because my feed stock is basically Free !!! The amount of time refining this material is insane but fun
I love to see the honest results of experiments like this. The bulk of the brass is copper, which should be no problem when inquarting, but that 15% zinc and the lead tin soldier really changed everything. Awesome video Sreetips. Its cool to see you experimenting and showing why its better to stick with a sterling silver inquartation when possible. If not, use pure copper or pure silver.
I have watched so many of these videos now and I still find it fascinating. I am sure some time in the past person or group figured out how to do this in antiquity. That knowledge was lost and that is how the rumor of alchemy turning lead int gold came about.
Not only is the Zinc more reactive, but as it is removed early, it's absence will leave channels through the remaining mostly copper alloy. Those channels will add a lot of surface area, thus speeding up the remainder of the extraction. You might find yourself using this more often, to save time. Lets hope it doesn't add any problems. Of course, you could also inquart using a mixture of sterling silver and gold filled scrap.
I think he spent maybe up to 10 hours extra to recover 6 extra grams from the gold filled scrap. Combined with the extra headache, I think it's not worth using this method.
@@lazyman114 Trying something new always takes more time. Doesn't mean it's not worth trying. Best way to learn something new. The problem Steetips ran into is not inherent to this method. It's a problem whenever the inquarted gold is much less than 25%. At 25% you get a gold sponge.
Appreciate the video! I know it’s kind of a taboo subject on TH-cam but I’m really interested in the financials behind buying scrap gold / finding the chemicals for the best prices / selling the refined gold for profit etc. Thanks again!
You are welcome! Tremendous video of a tremendous effort with a tremendous result that I watched in tre instalments and which I give tre tumbs up--->👍👍👍
I think he kinda had to with this round. He said during one of his recent platinum videos that Mrs. Sreetips wasnt happy with him getting behind due to the platinum stuff.
I love to sit and watch your videos I learn so very much . Even though I don't do experiment such as yours . It's always good learn something new from a learn Ed person such as you .
Don't know whether this might be useful but I used to have to extract settled sediments from the liquids, the problem was you couldn't Syphon off all of the liquid, so I got a wine bottle with a plastic screw top, cut off the bottom with a tile saw, then you could fill with the liquid and leave it, the sediments settled on the plastic cap right in the neck, so you could Syphon off almost all the liquid without disturbing the sediment, it's also how the painters extract pigment from water based paint out of brushes, it just flows out of the brush and falls to the bottom without circulation,
54:07 It looks like a lot of fine gold powder is pouring off into the gold refining waste flask. Is there something about the impurities in this batch that causes Au to precipitate into a fine powder, rather than into the usual larger granules?
Considering that a lot of colloidal gold went to your temporary waste container while cleaning the precipitated gold, the yield was really good. I believe it was so close to the theoretical yield because of the extra from the gold filled material, about 5 to 6 grams. Anyway, that's a messy alternative to be used when you have no silver/copper readily available, but it is surely not ideal.
Ended up with a good looking bar! First drop the liquid was the same color skin turns when wearing gold filled jewelry! Have you thought about going to a greater gold percentage with the alloy to see if it prevents it from going colloidal?
@@sreetips the other thought would be to re-melt after the first couple of nitric acid baths when you are no longer getting a reaction and most of the zinc is gone. You would be left with mostly copper and some silver and it might keep it from breaking down into colloidal.
Your most perfect bar yet, and at today's spot price just a bit over $7300. And it seems that the high-purity gold precipitate tends to clump together (so that less of it gets poured off with the waste solution) than the low-purity stuff earlier.
This gentleman sound's like a Airplane Captain I feel save to fly with. I am watching this for 3 days, it is really interesting. Thank you. Good bless America and it's service to the world.
Beautiful bar! Super interesting process this time. It looked like you were loosing quite a bit when the gold was in that finely divided state during the pouring off process. It’s really interesting the different states the gold goes through during the process. Any ideas for future inquarting, i.e different metals or just going to stick with sterling?
Great work as usual Sreetips. The zinc and copper will use a little more nitric acid than the silver would have because these metals both have a valence of 2 rather than the valence of 1 for silver. Interestingly, under some controlled reaction conditions, zinc will form nitrous oxide "laughing gas" instead of the brown nitrogen dioxide that usually forms.
I think this video perfectly illustrates the difference between how things work in theory and how they work in reality. I thought using gf scrap was a great idea, but I never would have thought you had the troubles with it that you did. Great video.
Excellent video! Really proves the point that your silver enquartation approach works really well compared to using gold filled scrap. Still, in spite of the extra work you produced another stunning bar with a very good yield. Well done! 👍
When you get the purple gold nanoparticles in suspension, I wonder if adding a small amount of SMB would act as a surfactant, and cause them to condense? I know that it can make particles of many atoms when it reacts with chloroauric, but I wonder if it can have the same effect on particles in suspension. Next time you get some 'purple gold' it might be worth putting some in your spot wells and trying different remedies like copperous, or even lye. If you can find an additive that efficiently condenses colloidal gold, it might open up other refining options.
Even in these difficult situations,...you produced an excellent yield and excellent content. Must be difficult to concentrate on the video-content side, while working on a stubborn process.
Would it be more efficient to remelt the black gold powder and inquart with silver so you can refine in a normal fashion instead of pouring off small amounts of suspended gold powder each and every time you drain off a rinse?
very long video, very interesting....I normally can't watch for 2 hours, but made it all the way through. That was a lot more work than you normally have to do, and I am sure more expense in chemicals. Thanks for the video !
Could you have used HCL to dissolve the zinc first, without dissolving copper or silver? It would be cool to show off the chemistry of the reactivity series. Or would that have made the colloidal gold issue worse?
is home refining profitable? aside from when you purchase for demonstration purposes & overpay... Also I was thinking Instead of just doing a straight nitric to pull out the base metals only, you could do it another way without having to inquart. Why not do aqua regia to put all metals in solution then precipitate/filter & do nitric pulls when it is a dried powder? I think it would do it better with fewer nitric boil pour offs... I could be wrong, I have as yet to do my first refine with all this e-waste from computers I found that I couldn't just rebuild & give away... Surprised that some of these old processors can go for quite a bit of cash... same as the ram & other hardware... almost like it was when it was cutting edge technology... lol..
You could put the karat gold directly into aqua regia without inquarting with silver. But two major problems would arise. 1) it makes a very dirty solution that looks like used motor oil. 2) any of the gold that contains much silver would passivate. The HCl in the AR would react with the silver and form a tough layer of silver chloride that would shield the gold from the acid. To remedy it must be removed before the gold will go into solution. Both problems are completely eliminated by inquarting with silver (or clean copper) and parting with hot dilute nitric boils BEFORE going to aqua regia. Plus, I refine silver and the first step is to dissolve it in hot dilute nitric acid. So why not use it to inquart? Like refining both metals at the same time.
Very interesting to see you use the gold filled scrap this time and very interesting to hear the facts of "gold plated", I will never buy this now after learning this from you. Nice that the yield was close, I wonder how much gold is in the stockpot? Awesome video. 👍
113.08 i noticed that after your 2nd refining the gold became more solid or not as fine particulated as the 1st refining did, It poured out alot easier.
Wow. Did not expect that much difference (powder instead of a sponge.) Looks like you could cut back on the amount of base metal when it contains zinc. I don't think you made a mistake trying this. You just need to tweak the process a bit, and it could well work out better than using just sterling silver.
I agree, though he uses sterling to refine both the gold and the silver. I figured it'd be easier to refine the GF than it would be to increase the karat yield. Would be nice if he tried again at some point.
Gold filled takes several days to get it done. I can refine gold to high purity in ten or twelve hours. Combining the two processes into one, like in this video, seems that it defaults to to longer of the two processes, time wise.
Wow at the final dissolve in aqua regia, it seems the solution was so saturated with dissolved gold I think that's why it was having trouble dissolving more until you added more Hcl! You can tell when that auric chloride is that dark the yield is going to be crazy! Amazing video, and it was a dirty procedure, but as usual, you turned it into a win!
Considering the amount lost in waste that was a excellent total. Way more than I thought. No stannous testing, was it not really necessary on this one or was it cause you knew some would stay suspended ? 1 other question I always wanted to ask, would it be worth getting a digital karat reader? I know a lot of pieces not plumb would always be either under or over karat stamp. Would that interfere in inquarting ?
There’s a “Goldie locks” range for inquarting. Too much silver and the gold will crumble to a powder making separation of the silver difficult to pour off. Too little silver and the nitric may not be able to penetrate.
Theoretically yes. But in actual practice, it probably wouldn’t work well because both metals are close in the reactivity series and therefore not very reactive.
Seems like no matter how you process GF scrap it's a pain the ass. If there was only a way to figure out how to streamline the extra time it takes it would be a great way to use up all that GF scrap you got stashed away.
would be nice if he tried again at some point. Was hoping it would streamline the GF process. Maybe he needs to add less GF and more karat due to the zinc?
Been doing my revision. (You've got me doing my balanced equations again!!) Seems to me that the white clouding solid making that first filtering a nightmare was almost certainly Lead sulphate. Anyone agree? Sree mentioned that lead solder was likely present in the Gold Filled material. Honestly, this channel is reigniting my love of chemistry all over again! If I'm ever at a pub quiz, I'm definitely going to know what Muriatic Acid is more properly known as!! Thanks again for all your effort.
My idea for a cool bit of video, or video in itself, is showing how the lead in solution reacts to the sulphuric acid by adding a bit of lead or solder to what would be a gold refining process Obviously it would only be a proof of concept video and not actually include the use of gold in solution, but maybe some weighed out (gram or two) before and after lead/solder to a silver or copper solution? Just a thought. Thank you for the awesome videos.
Just a late observation here- but using the GF scrap, you don’t take into account the karat gold content from the GF stuff into your calculations- curious if your 6kt inquartation goal is still met.
The fact that the gold crumbled to a powder instead of staying solid chunks is an indication that there was actually too much non-gold metals present in the alloy.
Hooyah Shipmate!!! I love your videos. You do great work. I have an idea, could you put your fume hood over a regular glass topped stove? Then you would have four burners at the ready and you wouldn’t need to keep replacing the single burner so often. Thank you.
Also a self cleaning oven gets like up to like 900 degrees. That might help instead of using your outside oven/ kiln. I hope not to be nosy, but after seeing your videos from years ago it seems like you are constantly trying to improve your processes. I’m mostly thinking of how I’m gonna make my refining work center. You motivate me!! If you can do it I can too.
Absolutely excellent video Sir Sreetips!💯This is exactly how we learn brother! A huge THANK YOU!!! You did a incredible job cleaning up that solution! Bravo!!! Is there a difference between Stump-out and Food grade SMB?
At one point last year you talked about putting ram-fingers and other electronic scrap into your stock pot and let it react so the foils would come off and it would be possible to recover the gold. Could you do something similar with GF material? Let the brass replace the sacrificial copper?
Because Zinc is so high in the reactivity series and Brass is a Zinc containing Alloy; If it is in high enough concentration It will precipitate the metals below. Fouling the stockpot and complicating the process.
Hello Mrs and Mr sreetips. I love the way you take us thrue wats happen. Ten tumbs up from me😊. I coment before i have see the whole clip, becouse i now you i now you make it🌹. Have a nice weekend, and my god bless you more, and more. Thank you both of you. Arne
Couldn't you do a few hydrochloric acid boils first to remove some of the zinc? Dump the hydrochloric and zinc then rinse and add nitric. Or, would the hydrochloric just coat the metal with silver chloride and make a mess?
Is there any drawback to long term storage of gold in the dried precipitate powder form? Other than the extra space required? Gold is a noble metal, right? Was just thinking it would be a great way to conceal, from most people, the fact that it is gold.
No problems storing it in powder form, other than a stiff breeze blowing it away. No problems with storing it in liquid form either, other than spilling it on the ground. Even then, some of it could be recovered.
That’s one of the reasons gold is real money. It lasts almost forever! Throw a gold coin in the ocean. Pull it out a hundred, or a thousand years later and it will look just like it did the day it entered the water. That’s one of the reasons why it’s so valuable.
I have this question: when you have gold dissolved in aqua regia, and you drop it out with SMB, do all metals drop out? Or are there any metal contaminants (like, say, copper) that would stay in solution, if they were present? Obviously sodium stays in liquid since it's part of SMB, so I guess it would be an example that answers my question, but I do wonder if there are other, more relevant, metals, that are left behind by this step.
If you do water boils after the initial nitric boils you should dissolve out and remove 99.999% of the base metal nitrates prior to the aqua Regia. The filter then removes most of the sulfates that were insoluble in both water and aqua Regia. Ideally that means very little is in the solution your adding the SMB too. It should in theory at that point be functionally pure chloroauric acid in water. The cloudiness of the first crash are the nanoparticles left over that pass the filter. So you do the second aqua Regia dissolve to give yourself another filtration chance to get them out. Each time should be 99.5%+ removal of contaminates so two is normally enough for three 9 gold. Three often gets you close to four 9 gold. Rarely worth bothering for more than four 9 gold.
SMB is fairly selective in that it will precipitate only the gold and leave the copper in solution. HOWEVER, it will precipitate out platinum group metals, in trace amounts, if they are present in the gold solution. Ferrous sulfate seems to be the most selective of all gold precipitants. It (ferrous sulfate) “will drop the gold, all the gold, and nothing but the gold.”
Why wouldn't you test the liquid with the stanis paper prior to pouring off into the waste bottle? Can you not participate the gold out prior to pouring the liquid off?
I see the benefits of using the gold filled material for inquarting. I wonder what the cost benefit is compared to silver. A higher gold yeald, but not much silver to recover. Still fun to watch.
I refine silver also. The 1st step is to dissolve it in hot dilute nitric. So I missed an opportunity to get some more silver dissolved. I have much sterling that needs to be dissolved. But I’ve also got a bunch that needs to be melted, granulized, and run through my silver cell. I’m way behind on everything.
Me and my wife recently discovered your channel and we have been bingewatching your content. It has a very strong ASMR video feel to it. Now we got talking about your accent and im thinking Boston, the wife is saying Vermont. How wrong are we?? Absolutely enjoying the video's!
Do u buy from a store or have you ever made your own distilled water? I recently have been making my own distilled water and it had been going well then out of nowhere I added some water to a solution that had some silver and sure enough It turned into silver chloride just out of the blue. So I'm gonna have to go back to store bought until I can figure out what happened. Thanks for making the videos. Especially this one. I had gotten this same sort of thing happen to me.
For every 108 g of silver you need 2 moles of hno3. 2 moles / 14 M is 1/7 of a liter of concentrated hno3, or 140 ml of concentrated hno3. For every 65 g in of zinc, it’s also 2 moles or 140 ml of hno3. Zinc will gas out with 22 liters of h2 gas for every 65 g of zinc. This is why zinc dissolution turns into a frothy mess.
Zinc is about a third less dense than silver, so every 1 gram of zinc you add takes up the volume of 1.47 grams of silver. So a larger fraction of the volume of the alloy is going to be base metals. With the same amount of gold stretched over a larger volume, the resulting gold particles will be smaller. So it's basically the same adding way too much silver, which would also end up giving you that annoying fine powder. At least, that's my reasoning. Density in alloys is probably not that simple. Somebody who knows more can correct me.
going from loking like the pirate/miners gold at amusment parks where you pan out your own "nuggets" and getting them smelted in to a coin i think. It had the excat same colur as inquartation and from that going to that black mud with specs of purple calling it for the night all setteling giving you a boost to make a really nice bar in the just missing 0.7g that was amazing. just a question is it the mold or is it technic that made the bar non flat in the bottom? Kindest regards from sweden so excuse the bad english
The mold is graphite. Pouring molten gold into a hot graphite mold is going to produce an irregular pattern on the bottom and sides of the bar. Most bars that are perfect in every way have been stamped or pressed.
Thanks for a different method something new I learnt about gold filled jewellery to gold plated. You have great patience. I reckon that would be very beneficial especially with gold. Well done 👍 A big problem I have is not all gold is marked. But I've come across 18 K with no marks. It must be jewellery that is home made perhaps??
Sometimes a jeweler will size a ring and cut out the karat stamp. The jeweler doesn’t care about being able to ID the metal that the ring is made of. Only about getting it to fit the customer properly. The jeweler will put 10k clasp on a 14k chain because it’s a more durable alloy than 14k - according to him (the jeweler).
I have seen gold from Thailand, although many decades ago, that was in the range of 18k to 20k and unmarked. Really soft jewelry however, not good for everyday wear.
I've wondered before if you could use pure copper to inquart instead of silver. This video almost answers that, but it sounds like the zinc is what caused most of the issues. At least in the amount it was. Still, interesting to see alternatives and the pros/cons.... mostly cons lol.
Great video and it seems like a real pain to process it this way. But at least it turned out a beautiful bar. Seemed to break the gold down a lot more than silver.
So glad to see a happy ending on this. It sounded like it wasn't going too well and I was afraid of what the actual yield was going to be, but in the end, it's a gorgeous bar and very little (temporary) loss of gold!
Would it be possible to separate the plating if you cut up the gold filled pieces and dissolved the base metal in HCL first, rather than melting it all together?
No, but dissolving the base metals in hot dilute nitric would work. But then that the process used to recover the gold foils in a gold filled refining process.
Hey sreetips maybe you should try to siphon out waste solution after you have precipitate with SMB give it some time to settle out.. Coz it seems like your pouring out most of Ur gold into temporary waste solution flask this brings down your yield..
Why can't you filter your gold waste liquid and add it back to the Aqua regia? Thanks for another very interesting video. I'm a finish carpenter and respect/enjoy all forms of precision videos. CEE Engineering and Sreetips are always a must watch for me.
I could do that, but that would add time to an already lengthy process. Plus, letting it build up in the waste container is like a little off-line savings account.
49:17 "It's getting late. I'm tired. This is when mistakes happen." This quote should be noted as it is knownledge to live by. Not only pertaining to gold refining but just in general. Stay safe everyone!
You stay safe! I'll LIVE! Thank you!
Yup. Always quit if you get tired.
@@datbeast767 Nothing much would get done if I stop after getting tired. In my case, I get most productive when it's bedtime.
It would be cool to see a video explaining the cost to profit ratio. Like how much you spend on chemicals, electricity, and metals compared to the value of the finished product.
I believe it is negative. The scrap metal cost is fixed at scrap value. The refining costs are expensive. If you add up the two costs it is a big loss. Also, a percentage of the scrap material is lost during refining. The gold value in dollars per weight is the same regardless of purity. I don't think the cost in dollars is his mission. The silver from karat scrap is very profitable IMHO. 👍
The costs of equipment repairs, replacements, and upgrades and now replacements again, has been significant.
@@anthonyrstrawbridge Diamonds have no resale value. None.
He’s not doing it for profit. It’s a hobby so profit isn’t the primary mover.
@@Heymrk 👍👍👍♥️✌️
@@anthonyrstrawbridge And don't forget the TH-cam revenue.
-That white gold in your 14k portion is Rh plated.
-You could use the Au electroplated material to inquart. The Au is plated on brass, which is Ni and then Au electroplated. Just assume that all the electroplated weight is 'inquart.' You'd be adding in the same Cu and Zn that's part of your Au filled material.
-That junk metal is 'brass' or 'Zn diecast', that is zincate immersion (Na2ZnO3) coated, Cu flashed, Cu plated, Ni flashed, then Au flashed. Zn is just as useful to inquart as Cu or Ag. It all comes out when you do your HNO3 boils.
-The material at the bottom of your melt dish is likely stainless steel.
-I'm surprised at how little slag you have floating on top. That'd be your Zn or maybe Pb oxides. Looks like they might have been rinsed out into the drain when you spatter cast your melt into the cooling water tank.
-The activity series isn't going to predict reactivity with acid. If anything, the reaction you got would be from the amount of Cu and Zn in the inquarted gold. Whatever Zn you add to your process will pas all the way through to your final Fe waste stream and be discharged in any liquid supernate.
-Jeez. I didn't even consider Sn.
-That white sediment on the bottom of the beaker, after the HCl boil, is your PbSO4.
-Double, triple or even quadruple up on your filter paper for the Buchner funnel. In the old days, we'd use an asbestos fiber filter mat. I'd think you could use an activated carbon layer on top of the filter papers to help you get your clear solution. Of course, you'd need to add the carbon to your filter paper stash for later metal recovery.
Yes, the filtration step will be slow, but less sensitive to high pressure vacuum.
That IS nice Au!
Long road to well done!
Mr. Foote. Thank you for the lesson of the day. You answered my ?’s and I’m sure some of SREETIPS’ as well. Keep posting here please. I’ll be watching for my next lesson sir. 😊
Interesting to see how different this went in comparison to using silver. another great vid!
80 Minutes of goodness on a Saturday morning. Thank you good Sir.
There is nothing... and I mean NOTHING.. like the feeling of PURE GOLD.. in the palm of your hand.
Always love hearing you say that. Beautiful gold bar and great pour lines. Thanks for uploading.
Beautifully done. Stepping into something new, having it act in a very unexpected way, and you made the great save. Thanks for sharing. Steady wins the race.
Nice recovery Sreetips!....and the bar looked very uniform. A++++
If for nothing else, this was very interesting. To see a different inquartation with something different than silver. Thanks for the hard work.
36:39 You no need to waste hydrochloric acid for silver test. Use for it medium to high saturated solution of sodium chloride (cooking salt times cheaper than muriatic acid). And salt will not rise acidity of solution, but gives same precipitation result as acid.
36:50 That green cloud is copper dichloride (CuCl2) and possibly zinc tetrachlorocuprate (Zn[CuCl4]), both salts quite unstable(especially second) in nitric acid or it's salts solutions
43:44 Nasty ortostannic acid (or fine tin oxide, from G.F. material) clogging filters in minutes or go though it if not fine enough. Using filter "sandwich" will help alittle. Filter Sandwich from top to bottom: rude filter (cotton pad), semifine filter/filters(quick and/or medium flow class) and fine filter (slow flow class a.k.a. "blue tape").
To prevent forming tin oxide add citric acid as inhibitor (about 24 gram per 100 ml HNO3) and avoid to heat solution above 50°C.
53:46 forgot stannous chloride test
About that silver test, I'd say it is inconclusive, led chloride will also precipitate. The way to distinguish led and silver is to take a bit of that precipitate, (try to) dissolve it in ammonia and add some potassium iodide. Led chloride won't dissolve in ammonia and silver iodide will give a nice, bright yellow precipitate.
Or, just add a piece of copper. Silver will cement out, the lead won’t.
I didn’t do stannous at a couple spots. I’m so used to not do it then I forget while shooting the video.
@@sreetips Works ... in a non-acidic solution.
@@apveening Lead chloride precipitate only in concentrated solutions, in diluted solution it's redissolves. Solubility difference between lead and silver chlorides is significant: for PbCl2 is about 1gram per 100ml (at 25°C), and for AgCl is about 20micrograms per 100ml (or 0.2gram per tonne)
Twenty years of oil field machining with many late nights on a big lathe because everyone is waiting on ya! I’m surprised I’m not dead.
Thanks for sharing and I did learn something.
I did twenty years in the Navy. I remember waiting on the MR (machinery repairman) to cut new wearing rings for one of the fresh water pumps on the distilling plant. We had no water to take showers while underway until he got them rings cut. Them the whole ship was waiting on us to reassemble the pump and get the evaps back up and running so they could wash up. But that’s ok, I work better under pressure.
Thank yoy sir again. This was very informative as initially I was like wow that’s really smart. Until I saw the results now I know not worth the hassle. Thank you.
That trick with dissolving the gold off the inside of the beaker was pretty cool.
I thought so too ! did not know you could do that
Thank you for doing this video. I love it when people put themselves in situations that they're new at.
I love the chemistry of every one of your refineries. I read, liked all your comments. I agree with everything you mentioned. Keep up the good work & keep putting out this content. I've learned a lot from you. Thank you!
Excellent video once again thank you 😊 the struggle is real with the filtering process!!! I play with Escrap only because my feed stock is basically Free !!! The amount of time refining this material is insane but fun
I love to see the honest results of experiments like this. The bulk of the brass is copper, which should be no problem when inquarting, but that 15% zinc and the lead tin soldier really changed everything. Awesome video Sreetips. Its cool to see you experimenting and showing why its better to stick with a sterling silver inquartation when possible. If not, use pure copper or pure silver.
Man I fell asleep last night at 1:04:09 !! Finishing now! Man this reminds me of inquiring with too much copper!! Nasty mess lol so much extra work
A lot less loss than anticipated
Great video, it’s fun to watch you try new things…always learning! Maybe due to the increased reactivity of the base metal less is required.
I have watched so many of these videos now and I still find it fascinating. I am sure some time in the past person or group figured out how to do this in antiquity. That knowledge was lost and that is how the rumor of alchemy turning lead int gold came about.
Not only is the Zinc more reactive, but as it is removed early, it's absence will leave channels through the remaining mostly copper alloy. Those channels will add a lot of surface area, thus speeding up the remainder of the extraction.
You might find yourself using this more often, to save time. Lets hope it doesn't add any problems. Of course, you could also inquart using a mixture of sterling silver and gold filled scrap.
Might be worth experimenting to see at what percent of zinc does the gold start to fall apart and form suspensions.
Using silver feeds the silver cell.
I think he spent maybe up to 10 hours extra to recover 6 extra grams from the gold filled scrap. Combined with the extra headache, I think it's not worth using this method.
@@lazyman114 Trying something new always takes more time. Doesn't mean it's not worth trying. Best way to learn something new.
The problem Steetips ran into is not inherent to this method. It's a problem whenever the inquarted gold is much less than 25%. At 25% you get a gold sponge.
Great video. It’s a lot more work this way. The gold bar is beautiful. Awesome job.
Although this didn't all go to plan, it was a great thing to watch, to see you think on you feet, and get a great result is a testament to you sir!
Appreciate the video! I know it’s kind of a taboo subject on TH-cam but I’m really interested in the financials behind buying scrap gold / finding the chemicals for the best prices / selling the refined gold for profit etc.
Thanks again!
All these videos and still my favorite part is the melt table. Thanks Sreetips
Your process is wonderful to watch and your voice is extremely soothing thank you for another excellent video
You are welcome! Tremendous video of a tremendous effort with a tremendous result that I watched in tre instalments and which I give tre tumbs up--->👍👍👍
Really good idea, getting even more efficient with the process for gold filled material. I love seeing a new process or idea
I think he kinda had to with this round. He said during one of his recent platinum videos that Mrs. Sreetips wasnt happy with him getting behind due to the platinum stuff.
I love to sit and watch your videos I learn so very much . Even though I don't do experiment such as yours . It's always good learn something new from a learn Ed person such as you .
Don't know whether this might be useful but I used to have to extract settled sediments from the liquids, the problem was you couldn't Syphon off all of the liquid, so I got a wine bottle with a plastic screw top, cut off the bottom with a tile saw, then you could fill with the liquid and leave it, the sediments settled on the plastic cap right in the neck, so you could Syphon off almost all the liquid without disturbing the sediment, it's also how the painters extract pigment from water based paint out of brushes, it just flows out of the brush and falls to the bottom without circulation,
54:07 It looks like a lot of fine gold powder is pouring off into the gold refining waste flask. Is there something about the impurities in this batch that causes Au to precipitate into a fine powder, rather than into the usual larger granules?
No worries, in six months I’ll recover that gold
Considering that a lot of colloidal gold went to your temporary waste container while cleaning the precipitated gold, the yield was really good. I believe it was so close to the theoretical yield because of the extra from the gold filled material, about 5 to 6 grams.
Anyway, that's a messy alternative to be used when you have no silver/copper readily available, but it is surely not ideal.
well sure it is messier, BUT on the other hand you do 2 refinings in one, scrap and carat, so it seems like it does save work, and quite a bit
Now this is gold content. Love the experimentation vids.
Ended up with a good looking bar! First drop the liquid was the same color skin turns when wearing gold filled jewelry! Have you thought about going to a greater gold percentage with the alloy to see if it prevents it from going colloidal?
Didn’t think of it for this run. But it’s not a bad idea.
@@sreetips the other thought would be to re-melt after the first couple of nitric acid baths when you are no longer getting a reaction and most of the zinc is gone. You would be left with mostly copper and some silver and it might keep it from breaking down into colloidal.
Fascinating video as always I thought the splatter board idea was quite ingenious in its simplicity.
Thank you streetips. The audio quality is almost perfect.
Your most perfect bar yet, and at today's spot price just a bit over $7300. And it seems that the high-purity gold precipitate tends to clump together (so that less of it gets poured off with the waste solution) than the low-purity stuff earlier.
This gentleman sound's like a Airplane Captain I feel save to fly with. I am watching this for 3 days, it is really interesting. Thank you. Good bless America and it's service to the world.
Thank you!
Don't thank me, please I didn't do anything. But this videos are Legendary.
th-cam.com/video/5z0wUA4q1yA/w-d-xo.html this person has all the hacks on TH-cam.
Beautiful bar! Super interesting process this time. It looked like you were loosing quite a bit when the gold was in that finely divided state during the pouring off process. It’s really interesting the different states the gold goes through during the process. Any ideas for future inquarting, i.e different metals or just going to stick with sterling?
I have more sterling that needs to be dissolved so I’ll probably use that.
OMG! I am so excited to watch this just because it's an hour and 20 minutes! Can't wait!
Great work as usual Sreetips. The zinc and copper will use a little more nitric acid than the silver would have because these metals both have a valence of 2 rather than the valence of 1 for silver. Interestingly, under some controlled reaction conditions, zinc will form nitrous oxide "laughing gas" instead of the brown nitrogen dioxide that usually forms.
I noticed some white foam during the nitric boils.
I think this video perfectly illustrates the difference between how things work in theory and how they work in reality.
I thought using gf scrap was a great idea, but I never would have thought you had the troubles with it that you did. Great video.
I was anticipating the gold falling apart. It just didn’t happen as quickly as I was expecting.
Thanks for showing us that experiment.
Excellent video! Really proves the point that your silver enquartation approach works really well compared to using gold filled scrap. Still, in spite of the extra work you produced another stunning bar with a very good yield. Well done! 👍
When you get the purple gold nanoparticles in suspension, I wonder if adding a small amount of SMB would act as a surfactant, and cause them to condense? I know that it can make particles of many atoms when it reacts with chloroauric, but I wonder if it can have the same effect on particles in suspension. Next time you get some 'purple gold' it might be worth putting some in your spot wells and trying different remedies like copperous, or even lye. If you can find an additive that efficiently condenses colloidal gold, it might open up other refining options.
Even in these difficult situations,...you produced an excellent yield and excellent content. Must be difficult to concentrate on the video-content side, while working on a stubborn process.
Another stunning looking bar of gold, well done Sir..🙂👍
Would it be more efficient to remelt the black gold powder and inquart with silver so you can refine in a normal fashion instead of pouring off small amounts of suspended gold powder each and every time you drain off a rinse?
I’ve done that when I added too much silver and the gold crumbled to a powder. Remelt, inquart with silver and proceed as usual.
As always, great video,beautiful bar.
very long video, very interesting....I normally can't watch for 2 hours, but made it all the way through. That was a lot more work than you normally have to do, and I am sure more expense in chemicals. Thanks for the video !
Very Beautiful bar I love how it has a fingerprint look on it . Keep up your terrific videos . 👍👍👏👏
Could you have used HCL to dissolve the zinc first, without dissolving copper or silver? It would be cool to show off the chemistry of the reactivity series. Or would that have made the colloidal gold issue worse?
My guess is that it would make a mess
MAKE AMERICA GREAT AGAIN!!! LOVE YOUR VIDEOS!
is home refining profitable? aside from when you purchase for demonstration purposes & overpay...
Also I was thinking Instead of just doing a straight nitric to pull out the base metals only, you could do it another way without having to inquart. Why not do aqua regia to put all metals in solution then precipitate/filter & do nitric pulls when it is a dried powder? I think it would do it better with fewer nitric boil pour offs... I could be wrong, I have as yet to do my first refine with all this e-waste from computers I found that I couldn't just rebuild & give away... Surprised that some of these old processors can go for quite a bit of cash... same as the ram & other hardware... almost like it was when it was cutting edge technology... lol..
You could put the karat gold directly into aqua regia without inquarting with silver. But two major problems would arise. 1) it makes a very dirty solution that looks like used motor oil. 2) any of the gold that contains much silver would passivate. The HCl in the AR would react with the silver and form a tough layer of silver chloride that would shield the gold from the acid. To remedy it must be removed before the gold will go into solution. Both problems are completely eliminated by inquarting with silver (or clean copper) and parting with hot dilute nitric boils BEFORE going to aqua regia. Plus, I refine silver and the first step is to dissolve it in hot dilute nitric acid. So why not use it to inquart? Like refining both metals at the same time.
Very interesting to see you use the gold filled scrap this time and very interesting to hear the facts of "gold plated", I will never buy this now after learning this from you. Nice that the yield was close, I wonder how much gold is in the stockpot? Awesome video. 👍
You've gotten way safer with your technique in these videos. Love this and really enjoy the content you make. Awesome content!
I got a kick out of the aqua regia cleaning up that nasty looking glass! Great video!
113.08 i noticed that after your 2nd refining the gold became more solid or not as fine particulated as the 1st refining did, It poured out alot easier.
Higher purity tends to settle quickly and clump together nicely.
Amazing video thanks for sharing as always.. How is your silver cell doing, we miss it lol
I’ll get some footage of it in my next video.
'Atta boy. That's more like the result we're used to. And the pour lines on that little bar are amongst the nicest I've seen from you lately.
Wow. Did not expect that much difference (powder instead of a sponge.) Looks like you could cut back on the amount of base metal when it contains zinc.
I don't think you made a mistake trying this. You just need to tweak the process a bit, and it could well work out better than using just sterling silver.
I agree, though he uses sterling to refine both the gold and the silver. I figured it'd be easier to refine the GF than it would be to increase the karat yield. Would be nice if he tried again at some point.
Gold filled takes several days to get it done. I can refine gold to high purity in ten or twelve hours. Combining the two processes into one, like in this video, seems that it defaults to to longer of the two processes, time wise.
I may try it again with a smaller quantity of karat scrap and reduce the amount of gold filled I add.
@@sreetips The basic idea was sound. But yeah, it was a large amount for a trial run.
Wow at the final dissolve in aqua regia, it seems the solution was so saturated with dissolved gold I think that's why it was having trouble dissolving more until you added more Hcl! You can tell when that auric chloride is that dark the yield is going to be crazy! Amazing video, and it was a dirty procedure, but as usual, you turned it into a win!
Your Videos have soul cleansing quality.
Considering the amount lost in waste that was a excellent total. Way more than I thought. No stannous testing, was it not really necessary on this one or was it cause you knew some would stay suspended ? 1 other question I always wanted to ask, would it be worth getting a digital karat reader? I know a lot of pieces not plumb would always be either under or over karat stamp. Would that interfere in inquarting ?
There’s a “Goldie locks” range for inquarting. Too much silver and the gold will crumble to a powder making separation of the silver difficult to pour off. Too little silver and the nitric may not be able to penetrate.
14:48 Is it possible to use Gold to cement out Platinum in solution?
Theoretically yes. But in actual practice, it probably wouldn’t work well because both metals are close in the reactivity series and therefore not very reactive.
No, but the reverse is possible (but very slow).
Seems like no matter how you process GF scrap it's a pain the ass. If there was only a way to figure out how to streamline the extra time it takes it would be a great way to use up all that GF scrap you got stashed away.
would be nice if he tried again at some point. Was hoping it would streamline the GF process. Maybe he needs to add less GF and more karat due to the zinc?
Trying to process both at the same time usually defaults, time wise, to the slower of the two processes. Seems like.
Been doing my revision. (You've got me doing my balanced equations again!!) Seems to me that the white clouding solid making that first filtering a nightmare was almost certainly Lead sulphate. Anyone agree? Sree mentioned that lead solder was likely present in the Gold Filled material. Honestly, this channel is reigniting my love of chemistry all over again! If I'm ever at a pub quiz, I'm definitely going to know what Muriatic Acid is more properly known as!! Thanks again for all your effort.
Tin and nitric form metastannic acid, or tin paste. It will clog a filter like trying to pull Elmer’s glue through a filter paper.
@@sreetips and this is why I should not be trusted to get out the chemistry set!! thank you!
My idea for a cool bit of video, or video in itself, is showing how the lead in solution reacts to the sulphuric acid by adding a bit of lead or solder to what would be a gold refining process Obviously it would only be a proof of concept video and not actually include the use of gold in solution, but maybe some weighed out (gram or two) before and after lead/solder to a silver or copper solution? Just a thought. Thank you for the awesome videos.
Coming up, good suggestion.
@@sreetips Cool :D
I've been learning so much. I might try my hand at metals recovery.
@7:00 here the stories, the memories, the tears and the smiles, the efforts and struggles of a multitude of humans is molten down into oblivion...
This has been happening since ancient times. Biblical.
Just a late observation here- but using the GF scrap, you don’t take into account the karat gold content from the GF stuff into your calculations- curious if your 6kt inquartation goal is still met.
The fact that the gold crumbled to a powder instead of staying solid chunks is an indication that there was actually too much non-gold metals present in the alloy.
Hooyah Shipmate!!! I love your videos. You do great work. I have an idea, could you put your fume hood over a regular glass topped stove? Then you would have four burners at the ready and you wouldn’t need to keep replacing the single burner so often. Thank you.
Also a self cleaning oven gets like up to like 900 degrees. That might help instead of using your outside oven/ kiln. I hope not to be nosy, but after seeing your videos from years ago it seems like you are constantly trying to improve your processes. I’m mostly thinking of how I’m gonna make my refining work center. You motivate me!! If you can do it I can too.
That’s not a bad idea except, the stone wouldn’t hold up to exposure to the acid fumes.
Absolutely excellent video Sir Sreetips!💯This is exactly how we learn brother! A huge THANK YOU!!! You did a incredible job cleaning up that solution! Bravo!!! Is there a difference between Stump-out and Food grade SMB?
Thank you. No difference.
At one point last year you talked about putting ram-fingers and other electronic scrap into your stock pot and let it react so the foils would come off and it would be possible to recover the gold.
Could you do something similar with GF material? Let the brass replace the sacrificial copper?
Because Zinc is so high in the reactivity series and Brass is a Zinc containing Alloy; If it is in high enough concentration It will precipitate the metals below.
Fouling the stockpot and complicating the process.
Probably not a good idea.
For the purpose of inquartation, how do you know how much gold-filled material to use? Or do the constants you use for sterling silver still apply?
Should still apply.
Hello Mrs and Mr sreetips. I love the way you take us thrue wats happen. Ten tumbs up from me😊. I coment before i have see the whole clip, becouse i now you i now you make it🌹. Have a nice weekend, and my god bless you more, and more. Thank you both of you. Arne
Couldn't you do a few hydrochloric acid boils first to remove some of the zinc? Dump the hydrochloric and zinc then rinse and add nitric. Or, would the hydrochloric just coat the metal with silver chloride and make a mess?
Any silver present could cause problems - forming AgCl, which passivates materials it coats. That is why the nitric acid boils are used first.
Probably create a mess
Is there any drawback to long term storage of gold in the dried precipitate powder form? Other than the extra space required? Gold is a noble metal, right? Was just thinking it would be a great way to conceal, from most people, the fact that it is gold.
No problems storing it in powder form, other than a stiff breeze blowing it away. No problems with storing it in liquid form either, other than spilling it on the ground. Even then, some of it could be recovered.
That’s one of the reasons gold is real money. It lasts almost forever! Throw a gold coin in the ocean. Pull it out a hundred, or a thousand years later and it will look just like it did the day it entered the water. That’s one of the reasons why it’s so valuable.
I have this question: when you have gold dissolved in aqua regia, and you drop it out with SMB, do all metals drop out? Or are there any metal contaminants (like, say, copper) that would stay in solution, if they were present?
Obviously sodium stays in liquid since it's part of SMB, so I guess it would be an example that answers my question, but I do wonder if there are other, more relevant, metals, that are left behind by this step.
If you do water boils after the initial nitric boils you should dissolve out and remove 99.999% of the base metal nitrates prior to the aqua Regia. The filter then removes most of the sulfates that were insoluble in both water and aqua Regia.
Ideally that means very little is in the solution your adding the SMB too. It should in theory at that point be functionally pure chloroauric acid in water. The cloudiness of the first crash are the nanoparticles left over that pass the filter. So you do the second aqua Regia dissolve to give yourself another filtration chance to get them out. Each time should be 99.5%+ removal of contaminates so two is normally enough for three 9 gold. Three often gets you close to four 9 gold.
Rarely worth bothering for more than four 9 gold.
SMB is fairly selective in that it will precipitate only the gold and leave the copper in solution. HOWEVER, it will precipitate out platinum group metals, in trace amounts, if they are present in the gold solution. Ferrous sulfate seems to be the most selective of all gold precipitants. It (ferrous sulfate) “will drop the gold, all the gold, and nothing but the gold.”
Why wouldn't you test the liquid with the stanis paper prior to pouring off into the waste bottle? Can you not participate the gold out prior to pouring the liquid off?
I probably forgot to do it. The gold can be precipitated with SMB.
Could you do a filtration to catch the colloidal silver rather than losing it to the stock pot pours?
Colloidal goes right through a filter paper.
I see the benefits of using the gold filled material for inquarting. I wonder what the cost benefit is compared to silver. A higher gold yeald, but not much silver to recover. Still fun to watch.
I refine silver also. The 1st step is to dissolve it in hot dilute nitric. So I missed an opportunity to get some more silver dissolved. I have much sterling that needs to be dissolved. But I’ve also got a bunch that needs to be melted, granulized, and run through my silver cell. I’m way behind on everything.
Me and my wife recently discovered your channel and we have been bingewatching your content. It has a very strong ASMR video feel to it. Now we got talking about your accent and im thinking Boston, the wife is saying Vermont. How wrong are we?? Absolutely enjoying the video's!
Iowa
@@sreetips oh lord.... haha tnx for your reply. Love what you are doing
Love watching you work sreetips. I never miss a video.
While the refining took longer, wouldn't it still be worth it considering the time it would have taken to separately refine that gold-filled scrap?
By mixing the two, it made a lot more work than if I had refined each separately. My opinion.
Do u buy from a store or have you ever made your own distilled water? I recently have been making my own distilled water and it had been going well then out of nowhere I added some water to a solution that had some silver and sure enough It turned into silver chloride just out of the blue. So I'm gonna have to go back to store bought until I can figure out what happened. Thanks for making the videos. Especially this one. I had gotten this same sort of thing happen to me.
I use about twenty or twenty five gallons of distilled water per month. So I just get more be at the grocery store.
For every 108 g of silver you need 2 moles of hno3. 2 moles / 14 M is 1/7 of a liter of concentrated hno3, or 140 ml of concentrated hno3. For every 65 g in of zinc, it’s also 2 moles or 140 ml of hno3. Zinc will gas out with 22 liters of h2 gas for every 65 g of zinc. This is why zinc dissolution turns into a frothy mess.
“Frothy mess” is right
Zinc is about a third less dense than silver, so every 1 gram of zinc you add takes up the volume of 1.47 grams of silver. So a larger fraction of the volume of the alloy is going to be base metals. With the same amount of gold stretched over a larger volume, the resulting gold particles will be smaller. So it's basically the same adding way too much silver, which would also end up giving you that annoying fine powder. At least, that's my reasoning. Density in alloys is probably not that simple. Somebody who knows more can correct me.
going from loking like the pirate/miners gold at amusment parks where you pan out your own "nuggets" and getting them smelted in to a coin i think. It had the excat same colur as inquartation and from that going to that black mud with specs of purple calling it for the night all setteling giving you a boost to make a really nice bar in the just missing 0.7g that was amazing. just a question is it the mold or is it technic that made the bar non flat in the bottom?
Kindest regards from sweden so excuse the bad english
The mold is graphite. Pouring molten gold into a hot graphite mold is going to produce an irregular pattern on the bottom and sides of the bar. Most bars that are perfect in every way have been stamped or pressed.
@@sreetips oh ok then I understand
I thought about doing this a while back before I saw this video. I'm glad I saw the video before I attempted it. This looks like a huge pain.
It’s a bad idea, but it worked.
Thanks for a different method something new I learnt about gold filled jewellery to gold plated. You have great patience. I reckon that would be very beneficial especially with gold. Well done 👍 A big problem I have is not all gold is marked. But I've come across 18 K with no marks. It must be jewellery that is home made perhaps??
Sometimes a jeweler will size a ring and cut out the karat stamp. The jeweler doesn’t care about being able to ID the metal that the ring is made of. Only about getting it to fit the customer properly. The jeweler will put 10k clasp on a 14k chain because it’s a more durable alloy than 14k - according to him (the jeweler).
I have seen gold from Thailand, although many decades ago, that was in the range of 18k to 20k and unmarked. Really soft jewelry however, not good for everyday wear.
I've wondered before if you could use pure copper to inquart instead of silver. This video almost answers that, but it sounds like the zinc is what caused most of the issues. At least in the amount it was. Still, interesting to see alternatives and the pros/cons.... mostly cons lol.
Yes, clean copper actually works better than sterling silver. Less silver chloride to deal with.
Great video and it seems like a real pain to process it this way. But at least it turned out a beautiful bar. Seemed to break the gold down a lot more than silver.
So glad to see a happy ending on this. It sounded like it wasn't going too well and I was afraid of what the actual yield was going to be, but in the end, it's a gorgeous bar and very little (temporary) loss of gold!
That’s exactly how I was feeling
Would it be possible to separate the plating if you cut up the gold filled pieces and dissolved the base metal in HCL first, rather than melting it all together?
No, but dissolving the base metals in hot dilute nitric would work. But then that the process used to recover the gold foils in a gold filled refining process.
Hey sreetips maybe you should try to siphon out waste solution after you have precipitate with SMB give it some time to settle out..
Coz it seems like your pouring out most of Ur gold into temporary waste solution flask this brings down your yield..
It only looks like “most” of the gold. But it’s actually a small amount.
Zinc can be bought more pure from bullet people like midway U.S.A. Is it possible to save the copper from filled gold ?
Yes
Why can't you filter your gold waste liquid and add it back to the Aqua regia? Thanks for another very interesting video. I'm a finish carpenter and respect/enjoy all forms of precision videos. CEE Engineering and Sreetips are always a must watch for me.
I could do that, but that would add time to an already lengthy process. Plus, letting it build up in the waste container is like a little off-line savings account.
You should try using your silver shot to inquart and use the same constants you use for Sterling.
Is this the only way to refine the gold-filled stuff? How would you get the gold off the gold-filled material otherwise? Process it separately?
Yes