I enjoy these TH-cam short videos. I like your old ones for training, Please continue the educational side, the reactive series has surprises, I have enjoyed sharing your surprizes.
@@sreetips Thank you. I understand your videos and it seems quite simple to me. The only problem I have is finding the gold in the first place. I thought about having a small market stall buying it like that but I would be followed and probably burglarized. I live in a farmhouse in France no problem with fumes etc. Just where to buy it. Great videos by the way you are the best imo take care.
when i worked on a military base, i would raid their construction dumpsters, because they would just throw this stuff out. i would turn around and sell it on ebay for really good money.
Mil Spec Pins are (in my opinion) the 2nd best ewaste item you can get. I think if I had someone hand me a kilo of it, I would be have 7.4grams is alot of gold! 👍👍 BUT after watching this vid I know I'd have alot of work to do!!😩
@@bettycarrigan331 Hi Terry, I've watched alot of vids since this one. I don't remember everything in it, so I'd have to rewatch it. I see I said 7.4 grams a kilo! Might have been something in the vid to make me calculate that number. If you want to do this yourself study up on it. These videos of Sreetips are very educational, I've watched everyone of them and when I start to refine I'll watch them again and take detailed notes, also there is a book that he recommends in a few of his vids (It's like a refiners bible)!! I know standard fully plated pins on average yield about 1gram per kilo of pins! However mil spec gold pins are a much heavier plated pins than your average ones. After hundreds of hours studying I think it's safe to say that you should expect 2 grams or more per kilo of pins!! Again I'd have to rewatch this vid to see why I put 7.4 grams. It might be that he got a high yield from a batch and I just did the math and got 7.4 I'll tag this video to rewatch, I don't know how soon that will be, but as soon as I do I'll give you my opinion again. Probably a little more accurate than this one! Have a GREAT Day!!!
@@bettycarrigan331 Hi again Terri, I just watched again!! I was impressed with the yield. I remember now very well, this was probably the highest yield I've ever seen from gold pins of any kind!! 7.4 grams per kilo is alot! If you can get it for free!! Don't buy the scams online. I've never paid a penny for gold ewaste and very little on gas for vehicle. The way I learned about getting as much ewaste as you want (if the area you live in allows it) is watching "Ewaste Ben TH-cam" he has alot of info on getting ewaste!!! He also has an old video on how to start your own ewaste company! I highly recommend you to watch that, as well as keep watching Sreetips!!!
Invest in a glass distillation set or get a 1000ml retort and distill your own HNO3. KNO3 stump remover + H2SO4 drain cleaner and you will have a great supply of nitric acid.
Why not just skip dissolving the base metal and use Aqua Regia to strip the pins of gold? Seems like it would minimize lost gold and save a bunch on chemicals.
+coldbluefire because the Aqua Regia would dissolve the base metals with the gold and cause problems. It's best to remove as much of the base metals as possible first. Actually the best way to recover the gold is a sulfuric acid stripping cell.
@@sreetips Hello I Hope You are well I found your mail adress on TH-cam Please what is the thickness of gold plating if this pins/connectors ? please on 1 kilogram of pins and connectors gold plated with 1 μ(microns) How much is the average yield of gold in gramms Waiting for your Reply Thank you
dude cool video I've been refining for like the past month and i saved all my little bb's of gold and melted them down, mine looks about like yours, so that gives me hope! alot more than I thought it weighed :D
Good proof of concept. I'm sure on a large enough scale this could prove profitable. Is it possible to recover/recycle any of the reagents (Nitric acid etc?)
The nitric gets completely consumed during the reaction. The only other metal is copper, and it's not worth the time and expense to try and recover and refine.
I actually have some coming up to do. I think I am going to make an anode. Of copper zinc lead, tin. I melted about a dozen down and hit them with an xfr gun. I should plate out the copper on the cathode and leave zinc mostly in solution. And drop gold and a little lead. Drop the lead and then filter out chlorauric the precipitate. The sulphur cell I just need to big of a cell to be effective I'll try and make a video and go from there. Thanks for all your help getting me started.
+dekonfrost7 Nice! I'd really like to see your setup. I've never recovered gold with electricity. It will be something new and I am looking forward to learning about it.
+sreetips the fact is I have a metallurgical background. Refining is an extension of that skill I have lot to process. I just want the au th cu and zn are waste to me. But ill wind up with like 500 bucks worth of cu that way. So for like 100 bucks worth of chemicals I'm done. Also I don't really bother with nitric to make Aqua Regis I just use a salt. It's very cheap and works pretty good. But it's incredibly easy to overshoot your need of nitration. Simple and easy is electrolysis
through process you have done. i have processed the Cinch and Amphenol pins used in the circular male / female connectors. Some are rated at 30 micro inches of gold plate. " these ornamental, Decorative pins " i thought Not to be of such plating thickness.: i like your self am off, i routinely do get 0.25 of 1 percent by weight. some times, more, as pins can be 50 micro inches of gold plate, Circa 1965 / 78 . and even some colour coded ones, 75 micro inches of plating. Perhaps your throughness and good source of pins, gives you this good result. Admire the process, now let us find those gold pins. Cheers from Thomas GOLDBUYERca on the Forum
+Thomas Gx I thought these would in and out in an afternoon but they ended up taking me two days. Boy was I glad to see gold in solution, I thought I had done something wrong and made a mess.
Sodium cyanide and lead nitrate will cleanly remove gold and silver from base metal parts.... These days you have to produce your own cyanide salts in the lab thru pyrolysis however... But a little goes a long way
sreetips it works good as it does not require lixivating the base metals and is ideal for plated parts, the lead coats the base metal surfaces and conserves the cynide adding an oxygen source like h202 or a o2 tank / air bubbler accelerates the lixivation, you can easily do large batches like a tub full of plated scrap but large batches require a flow from bottom to top or vice versa a bubbler can help with that. percipation can be with zinc powder, or if you want a selective gold drop you can use sodium dithionate. Cyanide concentration can be monitored with the silver nitrate standard titration methiod, the process was formally sold as the "super strip method" cyanide sucks for solid gold as its does not dissolve it very fast...its ideal for micron gold / silver and films with fairly weak cold solution. .25% is typically used or ores for example, you can find tons of books on cyanide processes in google books the stuff is very useful... Just don't drink it...and keep fresh air flowing, getting it on your skin is not an emergency as long as you rinse it off... There a certain dose threshold at which point it becomes an issue, that typicaly requires ingestion or inhalation to achieve, most people can't smell the gas HCN, so assume fume hood or open space usage, keeping the solutions basic with protective alkalinity typically stops the possibility of HCN production, but just assume its possible for safety reasons...
I love watching your videos, but unless I am missing something here, it appears that it is costing you more money to refine the metals than what you get in return.
I just started recovery from computer scrape. That is very difficult processing to sort IC chips. Mlcc capacitors and other components and also gold plated pins. Too much time to take to sort all the components. Please tell me easy way if we do another procedure
+ovidiu anghel The best thing to do is incinerate. Put the foils in a flame proof melt dish, then heat to redness. Avoid melting. Upon heating the metastannic acid turns to a compound that does not dissolve well in acid, plus it can then be filtered out without gumming up the filter paper.
I work on this pins,,after nitric treatment,,,lot of gold foils i get,,,but after ar treatment,,,there is not much gold powder,,,,i also melt some gold foils direcly,,,without ar treatment,,,then i get a small pice of plladinum,,,not gold,,,what is wrong with me,,,plz help
That's not so. If you try to dissolve the gold first, before removing the base metals, then there will be several problems. First, as the gold dissolves, the base metals ( in accordance with the reactivity series of metals ) will cement out onto the undissolved base metals just as fast as it (the gold) dissolves. The gold will NOT stay in solution until after all the base metals go into solution. So the best coarse is to dissolve only the base metals first with dilute nitric acid. Nitric acid will not dissolve gold. Second, the hydrochloric acid in the aqua regia will form salts with the base metals and create a very dirty solution that is hard to filter and hard to recover the gold from. All that said, the best way to recover the gold from ANY gold plated material is through a sulfuric acid stripping cell.
Ok so I messed up I guess. I put a bunch of junk into nitric acid after washing it of course in HCL and rinsing 4 times. It's pins, rc jacks with the plastic rubber still on, a few pinless green cpus, CPU sockets etc.... It's now warming in nitric acid and distilled water. But is very brown sludgy stuff. So it's this coloring b cuz I mixed magnetic and non magnetic? Ugh plz help
Gold from pins you add 1 spoon if SMB video prior to this one you added 8 spoons of smb. What is the criteria for quantity? Both beakers were not that different. Rules?
I just added SMB until I thought there was no more gold in solution. When first starting out add a spoon of SMB then test with stannous. Add another spoon, test with stannous. Repeat until the stannous test is negative. If excess nitric is present (common for beginners) it will take much more SMB until all the excess nitric gets consumed. In time you learn how to add just enough nitric to just dissolve the gold. Then the amount of SMB required will be much less.
im going to construct a sulphuric acid stripping cell, with stainless steel and copper mesh. does it matter how big the stainless steel sheet has to be?
After precipitation I always filter the gold powder out of the green liquid. Then, after rinsing the gold while it's still in the filter with a little hydrochloric acid, I dump the wet filter and the gold back into a clean beaker. I add some fresh hydrochloric acid, cover the beaker, and place it on low heat. Then I add just enough nitric acid to completely dissolve the gold a second time. The filter paper disintegrates and gets filtered out during the filtering process. After filtering I precipitate the gold a second time. This second refining really cleans the gold up nicely and gets rid of the green liquid completely.
Well done. I'm still not sure why you killed the first digestion of foils and then started it over again. I would have just left it on the heat and let the AR do it's thing. Good yield results!
+IsettasRock I stopped the first digestion and precipitated the gold so I could get the gold powder out of the ink black solution without filtering first. I usually always filter BEFORE precipitating. I just wanted to get the gold out of that dirty solution so I could see what was going on with the undigested gold. This was all new to me and nothing was progressing like I am used to seeing it go. For example, when I added the nitric to the mixture of gold foils and HCl, the solution turned jet black instead of yellow/orange like I am used to seeing. Also, the nitric digestion took much longer than I expected. But I was pleased with the yield being greater than I expected.
+sreetips When you did your first AR on the foils you had most of the base metals gone at that point. The first AR digestion shouldn't have been any different than doing a batch of ceramic CPUs in AR for example. Can't always go by the color of the solution as it will throw you off. Believe me, I've had some dirty batches of CPUs and as long as there is enough volume of solution (acids+water), it will finish fine.Anyways, looking forward to seeing more videos in the future.
+sreetips When it comes to recovery & refining there's more than one way to skin a cat! I think you're quite experienced at this and I have been learning from your videos, keep up the good work!
+IsettasRock wait until you see the video I'm working on right now. I did not incinerate the paper properly and I got some junk in with the Aqua Regia digest that glogged my filters. I had to reincinerate to get rid of the junk. I noticed the paper was kind of black and fluffy instead of a white/grey powder. To save time I just went with it. A classic example of a short-cut ending up costing me ten times more time and work. The video is about refining a jeweler's work bench floor mat. It has become a nightmare, but the whole process, mistake and everything, will be documented in the video.
+Helder Freitas I can't remember if I explained this yet to not, I did a test with silver testing solution and the color of the solution turned green indicating brass (alloy of zinc and copper). Blue would have been copper, plus I visually inspected and the metal under the gold, where I filed, was a gold color. Copper is pink looking, brass is gold looking. The visual inspection, lack of magnetic properties, plus the silver testing solution turning green (instead of blue) led me to conclude that the base metal was brass - a metal that dissolves easily in hot dilute nitric acid.
The dissolved base metals must have a place to go. The water provides a medium to carry the dissolved base metals once they dissolve. Using less water will work, but it will be less efficient. An example is using just liquid soap to wash your hands. It will clean them, but it won't do it every efficiently. Adding water to the liquid soap greatly increases the efficiency of the soap. Adding water 50/50 with the nitric acid is the best way to go, in my experience.
Donald, getting nitric acid seems to be a problem for many. I buy mine from GFS chemical. But you must have a company name, and they won't ship to a residential address.
I know this is like 4 yrs later but if one would grind up the pins would the reaction take less nitric to produce better or quicker results and by any chance you can be hired as consultant for future simply because i only trust 2 ppl I can tell so far no offense to others you are one of them cody being the other
working on airplane throwing and changing daily yellow pins so am sure time it's aircraft parts must be more gold on it. but the operation is to complicated with all this kind of acid. I have nitric acid can I just let pins on nitric for days and see ?
You'll probably end up with a mess and recover no gold. In the video, I used nitric to dissolve the brass so I could recover the gold foils For refining. I did it for demonstration only. This is not the best way to recover gold from gold plated items. The best way is to use a sulfuric acid stripping cell to reverse-plate the gold off the gold plated items. I made a video that shows how to construct and operate a sulfuric acid stripping cell.
100$?! In Russian suburb you could have a house run fully electric for that price (climate, hot water, cooking, lighting, everything), it's about 3500 KWh in equivalent.
There are those who have more experience than I who say that urea won't work to kill excess nitric, but I've used it in the past and it seems to work ok.
Sorry for being rude, but you're using your filters all wrong. The folding makes it hard to pour into, and doesn't make it any more effective, since the contents will push it flat and reduce any benefit you might get in terms of run-off speed. And for goodness sake wet them with water first! Otherwise you could be losing some of the filtrate as it goes into a dry filter.
Folding correctly, but when you unfold and insert into funnel, overlap the filter twice in one side and once on opposite side. You can also flip inside out then overlap.
Tout cela pour 1.2g d'or, tu as dépenser plus en acide que la somme récolté pour cette minuscule pépite !!! All this to 1.2g gold, you spend more acid than the sum collected for this tiny nugget !!!
Brass, an alloy of copper and zinc, is highly soluble in nitric acid. Iron and steel cause problems because it don't dissolve as easily in nitric. Also, when the gold is dissolved in aqua regia, if any metallic iron is present, the gold will tend to cement out on the iron. The iron based gold plated pins are best processed in a sulfuric acid stripping cell.
Silver test solution is called “Schwerter’s Solution” it is made by adding about 1 gram of potassium dichromate in 25ml distilled water and about 5ml nitric acid. Before I dissolve silver in nitric acid I always burn it first. Heat to redness to burn off oil or grease from human hands. Or other combustible material.
@@sreetips Understood. Thank you so much. Is there a tutorial video on this subject? On understanding what the different metals are that come out as a result of solution testing. (We're talking about the solution that captures the brass metal in the video, right? For silver and possible metals.)
Schwerters is only good for verifying silver. It turns blood red on contact with silver - no other metals will turn red with schwerters. If it turns green, blue or black, then it’s not silver.
I refine karat gold as a hobby. I've got all the items and chemicals required to do this experiment. So I am all set up to do this kind of work. But it is very labor intensive, as you can see by the video. Recovering gold in this way is something I don't do very often. But it is a way to get some pure gold.
Question: I have some Gold plated pins or appear to be gold and test with a basic gold test solution to be gold. They have solder on them from the circuit board. Would the best method to remove JUST the solder be a soak in JUST HCl for a while to remove the solder and get just clean pins for processing?
Is it necessary to kill the excess nitric? Whats the difference of using sodium metabisulfite and ferrous sulfate for precipitation? is there any advantage of using sodium metabisulfiteto precipitate the gold?
Excess nitric in with the dissolved gold causes problems. It should be "killed" before precipitating the gold. Sodium metabisulfite will tend to bring down platinum group metals if there are any in solution with the gold, especially if excess nitric is present. Ferrous sulfate will not precipitate platinum group metals.
Just to add a bit, to process 1000 grams will require about 5000ml of HNO3, that's just an approximation. I've done plenty of them. My chemical cost for recovery, about 25% of the yield value. To me that's to high, so now I use a stripping cell, it's far more cost effective. Investment was paid for with 2 lbs of pins. Pure profit now and I am still using the same solution.
Base metals, such as copper or brass (brass is an alloy of copper and zinc), are under the coating of gold on these pins. Nitric acid will dissolve these base metals, leaving just the gold shells behind (because nitric acid, by itself, will not dissolve the gold). This is how I know that the solution is saturated with base metals.
These type pins are used in plug-in type connectors where high reliability is required such as in military weapons systems. They usually have a thicker coating of gold than say, your cell phone SIM card connectors. If the thin gold on your cell phone rubs through then the only consequence is you won't be able to call. But if your getting shot at and your defensive weapons won't work because saltwater corroded the connectors - BANG - your dead. They can be bought on eBay.
Lmao.. I watched this video and i was like,,' oh man.. I said '' c,mon.... Your copying off sreetips.... It wasn't until the end I seen it was you ( sreetips)! 😂😂😂 I was mad for you for a second thinking someone copied your vids..
If you use hot sulfuric acid and water it dissolves the iron just as good as nitric acid and would cost less than using nitric , I watched a video on how iron and water react and it's very vigorous, then all you have left is the precious metals and some lead probably.
what do you do to the other pins that have tin or zinc or etc i used computer connector pins and have a white sediment at the bottom with my gold and am not sure what to do now
The sediment is probably a salt. Just let it settle completely for at least 24 hours, or until the liquid is crystal clear. It may take longer than 24 hours. Then use a piece of flexible PVC tubing and siphon off the clear liquid and leave the settled salts at the bottom. Gold plated pins are best deplated in a sulfuric acid stripping cell.
Hi sreetips, please what should I do or what method should I use to separate the gold from the white paste or residue that is formed when processing with nitric acid? It is impossible to filter it. Thank you.
White paste? Tin metal dissolved in nitric acid will form metastannic acid, or tin paste. It will gum up a filter so that no liquid will flow through the filter. Sulfuric acid will dissolve metastannic acid, but it doesn't do it very well.
I enjoy these TH-cam short videos. I like your old ones for training, Please continue the educational side, the reactive series has surprises, I have enjoyed sharing your surprizes.
It's fun to go back in time. The lack of Sreetips written on everything an not a word spoken and hearing the Darth Vader breathing is weird.
17 downvotes? I don't get it, how much more thorough could this guy be?
Really nice to find some of your videos that ive not seen yet
It would have been easier just to pan for gold in some random creek.
SOrry this is the California gold rush
depends where you're located. You cant find gold just anywhere :D
Yea but if you got a kilo you make 300 bucks
We “pan” for gold at yard sales, thrift stores, resale shops, consignment stores. It’s everywhere. Silver too.
@@sreetips Thank you. I understand your videos and it seems quite simple to me. The only problem I have is finding the gold in the first place. I thought about having a small market stall buying it like that but I would be followed and probably burglarized. I live in a farmhouse in France no problem with fumes etc. Just where to buy it. Great videos by the way you are the best imo take care.
I can't even pour myself a cup of coffee without spilling, attempting this would kill me in minutes.. Really enjoyable to watch though
when i worked on a military base, i would raid their construction dumpsters, because they would just throw this stuff out. i would turn around and sell it on ebay for really good money.
sreetips Brother . You are proverbially, DA MAN !! Easily more than an accomplished beginner Sir 🙏⭐💯😎🌎
This system is simpler and a whole lot less chemicals used and the waste is way cleaner
Mil Spec Pins are (in my opinion) the 2nd best ewaste item you can get. I think if I had someone hand me a kilo of it, I would be have 7.4grams is alot of gold! 👍👍
BUT after watching this vid I know I'd have alot of work to do!!😩
@@bettycarrigan331 Hi Terry, I've watched alot of vids since this one. I don't remember everything in it, so I'd have to rewatch it. I see I said 7.4 grams a kilo! Might have been something in the vid to make me calculate that number. If you want to do this yourself study up on it. These videos of Sreetips are very educational, I've watched everyone of them and when I start to refine I'll watch them again and take detailed notes, also there is a book that he recommends in a few of his vids (It's like a refiners bible)!! I know standard fully plated pins on average yield about 1gram per kilo of pins! However mil spec gold pins are a much heavier plated pins than your average ones. After hundreds of hours studying I think it's safe to say that you should expect 2 grams or more per kilo of pins!! Again I'd have to rewatch this vid to see why I put 7.4 grams. It might be that he got a high yield from a batch and I just did the math and got 7.4
I'll tag this video to rewatch, I don't know how soon that will be, but as soon as I do I'll give you my opinion again. Probably a little more accurate than this one!
Have a GREAT Day!!!
@@bettycarrigan331 Hi again Terri, I just watched again!! I was impressed with the yield. I remember now very well, this was probably the highest yield I've ever seen from gold pins of any kind!! 7.4 grams per kilo is alot! If you can get it for free!! Don't buy the scams online. I've never paid a penny for gold ewaste and very little on gas for vehicle. The way I learned about getting as much ewaste as you want (if the area you live in allows it) is watching "Ewaste Ben TH-cam" he has alot of info on getting ewaste!!! He also has an old video on how to start your own ewaste company! I highly recommend you to watch that, as well as keep watching Sreetips!!!
Invest in a glass distillation set or get a 1000ml retort and distill your own HNO3. KNO3 stump remover + H2SO4 drain cleaner and you will have a great supply of nitric acid.
I've got both and a distillation setup. I'll have to give this a try. Thank you.
Absolutely fascinating! Thank you.
glad you started narrating your videos
Keep rocken sreetips, another great video!
Rick in Pantano, AZ. yes the ghost town
how do you treat the magnetic pins
In our plating shop, we have a big vat of techni strip 11 which strips the gold!
Agent Orange does the istripper flakre thr gold off or put jt in the solutions
Would this process work for Gold plated connectors from PC Motherboards and such? Thx Also can Urea be used in lieu of Sulfamic Acid?
Why not just skip dissolving the base metal and use Aqua Regia to strip the pins of gold? Seems like it would minimize lost gold and save a bunch on chemicals.
+coldbluefire because the Aqua Regia would dissolve the base metals with the gold and cause problems. It's best to remove as much of the base metals as possible first. Actually the best way to recover the gold is a sulfuric acid stripping cell.
+sreetips Ah the power of Aqua Regia...I have much to learn, thx!
+sreetips finished product looked amazing just straight gold. great job!
Thanks for the comment.
@@sreetips Hello
I Hope You are well
I found your mail adress on TH-cam
Please what is the thickness of gold plating if this pins/connectors ?
please on 1 kilogram of pins and connectors gold plated with 1 μ(microns)
How much is the average yield of gold in gramms
Waiting for your Reply
Thank you
Amazing 👏
I'm learning so much thank you
A lot of work. But respect.
Good
glad you did this to show the and the cost.
dude cool video I've been refining for like the past month and i saved all my little bb's of gold and melted them down, mine looks about like yours, so that gives me hope! alot more than I thought it weighed :D
+Corey Blanchard Congrats - good luck with your refining.
Just melt it out gold melts a higher temperature then led copper nickel so if you have shot gold jewelry just melt it out
not bad... gold is around $40/ gram US right now.. so you pretty much got your money's worth...
500ml of Nitric Acid is around $35. Not to mention the hours of energy spend in labour, heating and other chemicals. Am I missing something?
yeah i rather mine gold with my bare hands
none left buddy, the most potent gold mines literally mine several tons of dirt, and then refine it.
ALL THAT HARD WORK FOR JUST THAT?... DAM
lol,same reaction !
cristian lopez ym
I think this was just showing you the process I am sure he does huge batches of this .. but there is money in it if you have the time
Penny's add up! Gold adds up faster!
With more than 900.000 views, he certainly did not lose money on these :)
Even so. Not a bad yield.
1000 grams of pins , 7.4 grams of gold = $290.00 ( 10/23/2016) not to shabby .
Add worktine and Chemicals prices...
Add in cost of buying the pins and everything else, he might've broke even, but the educational purposes are priceless
one of the best gold refining youtubers I reckon
Good proof of concept. I'm sure on a large enough scale this could prove profitable. Is it possible to recover/recycle any of the reagents (Nitric acid etc?)
The nitric gets completely consumed during the reaction. The only other metal is copper, and it's not worth the time and expense to try and recover and refine.
I actually have some coming up to do. I think I am going to make an anode. Of copper zinc lead, tin. I melted about a dozen down and hit them with an xfr gun. I should plate out the copper on the cathode and leave zinc mostly in solution. And drop gold and a little lead. Drop the lead and then filter out chlorauric the precipitate. The sulphur cell I just need to big of a cell to be effective I'll try and make a video and go from there. Thanks for all your help getting me started.
+dekonfrost7 Nice! I'd really like to see your setup. I've never recovered gold with electricity. It will be something new and I am looking forward to learning about it.
+sreetips yea I've never done it either. I guess it will be called called an industrial scale experiment.
+dekonfrost7 Where did you get the idea to do the recovery by electrlytic process?
+sreetips the fact is I have a metallurgical background. Refining is an extension of that skill I have lot to process. I just want the au th cu and zn are waste to me. But ill wind up with like 500 bucks worth of cu that way. So for like 100 bucks worth of chemicals I'm done. Also I don't really bother with nitric to make Aqua Regis I just use a salt. It's very cheap and works pretty good. But it's incredibly easy to overshoot your need of nitration. Simple and easy is electrolysis
+dekonfrost7 look forward to seeing your process.
no puedo creer que estuve 20 minutos viendo como transformaban basura en oro. youtube usted es diabolico.
Una perdida de tiempo, con esa bolito de oro, ni si quiera cubre los gastos de la cantidad de quimicos que utilizo
cuanto le pagarán por esa bola, cuanto gastó y cuanto le queda de ganancia,ahh y las 10 horas o mas de tiempo,me pregunto compensará hacerlo
Y despues que hace con los residuos???
respect bro I'm not going to do all that for 7.4 grams of gold , it feels it it's was me doing and I have a headache
through process you have done. i have processed the Cinch and Amphenol pins used in the circular male / female connectors. Some are rated at 30 micro inches of gold plate. " these ornamental, Decorative pins " i thought Not to be of such plating thickness.: i like your self am off, i routinely do get 0.25 of 1 percent by weight. some times, more, as pins can be 50 micro inches of gold plate, Circa 1965 / 78 . and even some colour coded ones, 75 micro inches of plating. Perhaps your throughness and good source of pins, gives you this good result. Admire the process, now let us find those gold pins. Cheers from Thomas GOLDBUYERca on the Forum
+Thomas Gx I thought these would in and out in an afternoon but they ended up taking me two days. Boy was I glad to see gold in solution, I thought I had done something wrong and made a mess.
يا صديقى اريد ان أعرف من أين أحصل على تلك الدبابيس، فى اى الأجهزة تكون موجودة ؟
ساعدنى لكى استطيع الحصول عليها
Isnt there a simpler way? Like burning or boiling or some other less toxic way?
Sodium cyanide and lead nitrate will cleanly remove gold and silver from base metal parts.... These days you have to produce your own cyanide salts in the lab thru pyrolysis however... But a little goes a long way
My jeweler friend has a big pickle jar full of cyanide eggs that his father used to use to refine their scrap gold. But I've never used cyanide.
sreetips it works good as it does not require lixivating the base metals and is ideal for plated parts, the lead coats the base metal surfaces and conserves the cynide adding an oxygen source like h202 or a o2 tank / air bubbler accelerates the lixivation, you can easily do large batches like a tub full of plated scrap but large batches require a flow from bottom to top or vice versa a bubbler can help with that. percipation can be with zinc powder, or if you want a selective gold drop you can use sodium dithionate. Cyanide concentration can be monitored with the silver nitrate standard titration methiod, the process was formally sold as the "super strip method" cyanide sucks for solid gold as its does not dissolve it very fast...its ideal for micron gold / silver and films with fairly weak cold solution. .25% is typically used or ores for example, you can find tons of books on cyanide processes in google books the stuff is very useful... Just don't drink it...and keep fresh air flowing, getting it on your skin is not an emergency as long as you rinse it off... There a certain dose threshold at which point it becomes an issue, that typicaly requires ingestion or inhalation to achieve, most people can't smell the gas HCN, so assume fume hood or open space usage, keeping the solutions basic with protective alkalinity typically stops the possibility of HCN production, but just assume its possible for safety reasons...
There is actually easier and safer ways to do this. Still a very good video.
nice work
I love watching your videos, but unless I am missing something here, it appears that it is costing you more money to refine the metals than what you get in return.
You’re not missing a thing. You are correct. I don’t refine much escrap these days because the yields are so low.
@@sreetips even though the Rio is not there, I still love the videos. Thank you for your sacrifice
@@sreetips oops ROI not Rio. Lol big fat fingers
I just started recovery from computer scrape. That is very difficult processing to sort IC chips. Mlcc capacitors and other components and also gold plated pins. Too much time to take to sort all the components. Please tell me easy way if we do another procedure
There is no “easy” way to get pure gold. That’s why it’s so darn expensive.
Another really interesting video. Thanks.
nice video, congratulations!
I also have a question, if you have on your nitric digest, metastanic acid, how do you deal with that?
+ovidiu anghel The best thing to do is incinerate. Put the foils in a flame proof melt dish, then heat to redness. Avoid melting. Upon heating the metastannic acid turns to a compound that does not dissolve well in acid, plus it can then be filtered out without gumming up the filter paper.
I work on this pins,,after nitric treatment,,,lot of gold foils i get,,,but after ar treatment,,,there is not much gold powder,,,,i also melt some gold foils direcly,,,without ar treatment,,,then i get a small pice of plladinum,,,not gold,,,what is wrong with me,,,plz help
one of the best videos on youtube
come one u could dissolve that gold earlier before dissolving base metals, lefting the base metals aside
That's not so. If you try to dissolve the gold first, before removing the base metals, then there will be several problems. First, as the gold dissolves, the base metals ( in accordance with the reactivity series of metals ) will cement out onto the undissolved base metals just as fast as it (the gold) dissolves. The gold will NOT stay in solution until after all the base metals go into solution. So the best coarse is to dissolve only the base metals first with dilute nitric acid. Nitric acid will not dissolve gold. Second, the hydrochloric acid in the aqua regia will form salts with the base metals and create a very dirty solution that is hard to filter and hard to recover the gold from. All that said, the best way to recover the gold from ANY gold plated material is through a sulfuric acid stripping cell.
I think you had a base metal contamination in that dirty AR.
5lbs is 2267.96 grams. . I've noticed in a couple videos the math seems to be off a bit. still a great video!
i love the videos would you be able to do a video where you recover the base metals like copper would love to see it
He does its called stock pot and treating the soultions with certain metals, if you want copper put in a piece of angle iron
Ok so I messed up I guess. I put a bunch of junk into nitric acid after washing it of course in HCL and rinsing 4 times. It's pins, rc jacks with the plastic rubber still on, a few pinless green cpus, CPU sockets etc.... It's now warming in nitric acid and distilled water. But is very brown sludgy stuff. So it's this coloring b cuz I mixed magnetic and non magnetic? Ugh plz help
Gold from pins you add 1 spoon if SMB video prior to this one you added 8 spoons of smb. What is the criteria for quantity? Both beakers were not that different. Rules?
I just added SMB until I thought there was no more gold in solution. When first starting out add a spoon of SMB then test with stannous. Add another spoon, test with stannous. Repeat until the stannous test is negative. If excess nitric is present (common for beginners) it will take much more SMB until all the excess nitric gets consumed. In time you learn how to add just enough nitric to just dissolve the gold. Then the amount of SMB required will be much less.
im going to construct a sulphuric acid stripping cell, with stainless steel and copper mesh. does it matter how big the stainless steel sheet has to be?
+Raymond Reyes - I've never used stainless so I don't have any experience to offer. I used a lead cathode.
Now I know how to turn $17,376 worth of chemicals and lab equipment into $50 worth of gold
You should make a video and show us how you did that
God damn the more I watch the more I want ot do such things :(
hahaha same here
tnx for video, i dont know why my aqua regia solution stay green even after percipating with smb , plz any solutions
After precipitation I always filter the gold powder out of the green liquid. Then, after rinsing the gold while it's still in the filter with a little hydrochloric acid, I dump the wet filter and the gold back into a clean beaker. I add some fresh hydrochloric acid, cover the beaker, and place it on low heat. Then I add just enough nitric acid to completely dissolve the gold a second time. The filter paper disintegrates and gets filtered out during the filtering process. After filtering I precipitate the gold a second time. This second refining really cleans the gold up nicely and gets rid of the green liquid completely.
I guess that's why they call it "red fuming" nitric acid?
Well done. I'm still not sure why you killed the first digestion of foils and then started it over again. I would have just left it on the heat and let the AR do it's thing. Good yield results!
+IsettasRock I stopped the first digestion and precipitated the gold so I could get the gold powder out of the ink black solution without filtering first. I usually always filter BEFORE precipitating. I just wanted to get the gold out of that dirty solution so I could see what was going on with the undigested gold. This was all new to me and nothing was progressing like I am used to seeing it go. For example, when I added the nitric to the mixture of gold foils and HCl, the solution turned jet black instead of yellow/orange like I am used to seeing. Also, the nitric digestion took much longer than I expected. But I was pleased with the yield being greater than I expected.
+sreetips When you did your first AR on the foils you had most of the base metals gone at that point. The first AR digestion shouldn't have been any different than doing a batch of ceramic CPUs in AR for example. Can't always go by the color of the solution as it will throw you off. Believe me, I've had some dirty batches of CPUs and as long as there is enough volume of solution (acids+water), it will finish fine.Anyways, looking forward to seeing more videos in the future.
+IsettasRock You're right. It was an unconventional move. Lack of experience and dealing with the unknown.
+sreetips When it comes to recovery & refining there's more than one way to skin a cat! I think you're quite experienced at this and I have been learning from your videos, keep up the good work!
+IsettasRock wait until you see the video I'm working on right now. I did not incinerate the paper properly and I got some junk in with the Aqua Regia digest that glogged my filters. I had to reincinerate to get rid of the junk. I noticed the paper was kind of black and fluffy instead of a white/grey powder. To save time I just went with it. A classic example of a short-cut ending up costing me ten times more time and work. The video is about refining a jeweler's work bench floor mat. It has become a nightmare, but the whole process, mistake and everything, will be documented in the video.
at a quick glance I thought it was bullets lol
so did i
hello again, can you explain better the step with the silver testing solution? I didn´t understand it very well.thank you
+Helder Freitas I can't remember if I explained this yet to not, I did a test with silver testing solution and the color of the solution turned green indicating brass (alloy of zinc and copper). Blue would have been copper, plus I visually inspected and the metal under the gold, where I filed, was a gold color. Copper is pink looking, brass is gold looking. The visual inspection, lack of magnetic properties, plus the silver testing solution turning green (instead of blue) led me to conclude that the base metal was brass - a metal that dissolves easily in hot dilute nitric acid.
Those screws and nuts were probably half your original weight.
Don't add that much water it slows reaction and acid will slowly stop reacting
The dissolved base metals must have a place to go. The water provides a medium to carry the dissolved base metals once they dissolve. Using less water will work, but it will be less efficient. An example is using just liquid soap to wash your hands. It will clean them, but it won't do it every efficiently. Adding water to the liquid soap greatly increases the efficiency of the soap. Adding water 50/50 with the nitric acid is the best way to go, in my experience.
very cool bro thanks for the education one quick question how would a regular person like me get a hold of nitric acid like that?
Donald, getting nitric acid seems to be a problem for many. I buy mine from GFS chemical. But you must have a company name, and they won't ship to a residential address.
well done!! Very nice video for knowledge....Thanks Bro..
This is where watching skylanders got me
I know this is like 4 yrs later but if one would grind up the pins would the reaction take less nitric to produce better or quicker results and by any chance you can be hired as consultant for future simply because i only trust 2 ppl I can tell so far no offense to others you are one of them cody being the other
Chopping the pins up would expose greater surface area and speed the reaction.
working on airplane throwing and changing daily yellow pins so am sure time it's aircraft parts must be more gold on it. but the operation is to complicated with all this kind of acid. I have nitric acid can I just let pins on nitric for days and see ?
You'll probably end up with a mess and recover no gold. In the video, I used nitric to dissolve the brass so I could recover the gold foils For refining. I did it for demonstration only. This is not the best way to recover gold from gold plated items. The best way is to use a sulfuric acid stripping cell to reverse-plate the gold off the gold plated items. I made a video that shows how to construct and operate a sulfuric acid stripping cell.
okay I will go slowly.
200$ spent on chemicals to recover it, 20$ profit!
More like $10 worth of chemicals and $60 gold.
Insane man
man, your electricity bill must be skyhigh
Nope, hundred bucks a month.
100$?! In Russian suburb you could have a house run fully electric for that price (climate, hot water, cooking, lighting, everything), it's about 3500 KWh in equivalent.
mrAarnie96
Sir what’s the filter number you used for filtration, can you learn us how do you fold filter paper
I’ll demonstrate in my next video: Stock Pot Three - in progress right now
Good video!!
Total gold value is $49.68
Could you use urea instead of sulfamic acid to neutralise the nitric acid?
There are those who have more experience than I who say that urea won't work to kill excess nitric, but I've used it in the past and it seems to work ok.
That's why the gold it's so expensive
very good
It will be above 85% concentration so you won't need as much
Sorry for being rude, but you're using your filters all wrong. The folding makes it hard to pour into, and doesn't make it any more effective, since the contents will push it flat and reduce any benefit you might get in terms of run-off speed. And for goodness sake wet them with water first! Otherwise you could be losing some of the filtrate as it goes into a dry filter.
Ok thank you.
Folding correctly, but when you unfold and insert into funnel, overlap the filter twice in one side and once on opposite side. You can also flip inside out then overlap.
Don't say it's nothing. That right there is worth 50 USD, and it was only a sample.
Tout cela pour 1.2g d'or, tu as dépenser plus en acide que la somme récolté pour cette minuscule pépite !!!
All this to 1.2g gold, you spend more acid than the sum collected for this tiny nugget !!!
Nice!
Why you use only the brass pins. What will happen with the other?
Brass, an alloy of copper and zinc, is highly soluble in nitric acid. Iron and steel cause problems because it don't dissolve as easily in nitric. Also, when the gold is dissolved in aqua regia, if any metallic iron is present, the gold will tend to cement out on the iron. The iron based gold plated pins are best processed in a sulfuric acid stripping cell.
how many hours did that take? and how much did all those chemicals cost? I doubt you even earned minimum wage from that.
I did not do this to make a profit. I only did it to make the video.
And he sell PINS !!! hahahaha :)
+sreetips don't let his last name fool you thanks for the videos always well done
same thing I was thinking
Gain easier and non-toxic recycle copper.
Hello master
Can I get information about the preparation of the metal and silver test solution you use, please?
Silver test solution is called “Schwerter’s Solution” it is made by adding about 1 gram of potassium dichromate in 25ml distilled water and about 5ml nitric acid. Before I dissolve silver in nitric acid I always burn it first. Heat to redness to burn off oil or grease from human hands. Or other combustible material.
@@sreetips Understood. Thank you so much.
Is there a tutorial video on this subject?
On understanding what the different metals are that come out as a result of solution testing.
(We're talking about the solution that captures the brass metal in the video, right? For silver and possible metals.)
@@sreetips Yes, I looked again and couldn't find a video on this subject. Could it be a video with a different name?
Schwerters is only good for verifying silver. It turns blood red on contact with silver - no other metals will turn red with schwerters. If it turns green, blue or black, then it’s not silver.
@@sreetips thank you.
Did the rice in the video detect the same solution?
Very cool to watch. But how much money did you spend in chemicals and how much time did it take to recover a gold BB?
I refine karat gold as a hobby. I've got all the items and chemicals required to do this experiment. So I am all set up to do this kind of work. But it is very labor intensive, as you can see by the video. Recovering gold in this way is something I don't do very often. But it is a way to get some pure gold.
Hi can you give me some information on how to refine silver with items that can be purchased over the counter in the UK thanks
I visited Portsmouth back in 1985. Other than that I don’t know what you have there.
How crazy I love in Portsmouth. Not to worry thanks any way
Live*
Really interesting video, but it does look like a lot of work and probably expense on chemicals for such a small amount of gold.
+SarahDoll87 about 10 bucks of chemicals I think
+SarahDoll87
It was my first time doing it this way. If I had it to do again I would probably go with a sulfuric acid stripping cell.
Question: I have some Gold plated pins or appear to be gold and test with a basic gold test solution to be gold. They have solder on them from the circuit board. Would the best method to remove JUST the solder be a soak in JUST HCl for a while to remove the solder and get just clean pins for processing?
I think that will work. But you may have to scrape the solder off once the HCl loosens it up.
David Lee
Thanks!
Is it necessary to kill the excess nitric? Whats the difference of using sodium metabisulfite and
ferrous sulfate for precipitation? is there any advantage of using sodium metabisulfiteto precipitate the gold?
Excess nitric in with the dissolved gold causes problems. It should be "killed" before precipitating the gold. Sodium metabisulfite will tend to bring down platinum group metals if there are any in solution with the gold, especially if excess nitric is present. Ferrous sulfate will not precipitate platinum group metals.
thank you!
Just to add a bit, to process 1000 grams will require about 5000ml of HNO3, that's just an approximation. I've done plenty of them. My chemical cost for recovery, about 25% of the yield value. To me that's to high, so now I use a stripping cell, it's far more cost effective. Investment was paid for with 2 lbs of pins. Pure profit now and I am still using the same solution.
I agree. I've made a video using the stripping cell to recover the gold from these type of pins.
Did I miss the spot in where you added sulfuric acid to drop the lead? Or did you not do it on this?
Maybe I forgot
So when exactly in that process would u normally add sulphuric acid to drop lead? And what like 2ml? Or so
When dissolving the gold I add 1/2 to 1ml sulfuric
How do you understand that the solution is saturated with base metals?
Base metals, such as copper or brass (brass is an alloy of copper and zinc), are under the coating of gold on these pins. Nitric acid will dissolve these base metals, leaving just the gold shells behind (because nitric acid, by itself, will not dissolve the gold). This is how I know that the solution is saturated with base metals.
That's about 52 dollars worth of gold...if it's pure.
And it's not pure.
How do you get the empurities out of jewlry, that are not totally gold?
Terry, please se my video on how to refine scrap gold jewelry
Ok. Basic question here. What the hell is a "military-spec gold pin"? What are they used for, and where does one get them?
These type pins are used in plug-in type connectors where high reliability is required such as in military weapons systems. They usually have a thicker coating of gold than say, your cell phone SIM card connectors. If the thin gold on your cell phone rubs through then the only consequence is you won't be able to call. But if your getting shot at and your defensive weapons won't work because saltwater corroded the connectors - BANG - your dead. They can be bought on eBay.
Lmao.. I watched this video and i was like,,' oh man.. I said '' c,mon.... Your copying off sreetips.... It wasn't until the end I seen it was you ( sreetips)! 😂😂😂
I was mad for you for a second thinking someone copied your vids..
Hello. what do you explore solution in 13.00 min films
Hi sir how will the gold polish be done by recover the senate, please sir upload the video please
If you use hot sulfuric acid and water it dissolves the iron just as good as nitric acid and would cost less than using nitric , I watched a video on how iron and water react and it's very vigorous, then all you have left is the precious metals and some lead probably.
That’s good to know
what do you do to the other pins that have tin or zinc or etc i used computer connector pins and have a white sediment at the bottom with my gold and am not sure what to do now
The sediment is probably a salt. Just let it settle completely for at least 24 hours, or until the liquid is crystal clear. It may take longer than 24 hours. Then use a piece of flexible PVC tubing and siphon off the clear liquid and leave the settled salts at the bottom. Gold plated pins are best deplated in a sulfuric acid stripping cell.
Hi sreetips, please what should I do or what method should I use to separate the gold from the white paste or residue that is formed when processing with nitric acid? It is impossible to filter it. Thank you.
White paste? Tin metal dissolved in nitric acid will form metastannic acid, or tin paste. It will gum up a filter so that no liquid will flow through the filter. Sulfuric acid will dissolve metastannic acid, but it doesn't do it very well.
sreetips OK thanks
where do you dump the chemicals
Into my waste treatment buckets.
sreetips
thanks