Mr Kevin, what amazes me more than any acid reaction, any precipitation, or any purity of gorgeous gold powder is your honesty and genuineness. In these days of videos flooding the internet with the sole purpose of deceiving viewers and people just wanting to make themselves appear special or skilled, here you are bringing REAL, HONEST content time and time again that's not just thoroughly informative and educational, it's very much exciting and incredibly wholesome. You Sir are one in a bilion, you're worth more than all the gold you've ever refined, you make the world a better place every day. You're truly an amazing individual, I hope you know that and never forget it. The entire internet says THANK YOU!!!!
@@sreetipsyou, sir, are a very talented and impressive man - congratulations to you on your skills and your communications ability... most entertaining as well...
I've been absorbing, learning from and watching every video you've posted for little over five years now but this is the first time I'll be reaching out and leaving a comment on one of your many videos. Thank you so much for everything you do and the knowledge and patience and time you take to walk us through not only your step by step procedures but also your thought process and reasoning behind why you're doing what you're doing. As a Canadian I am only saddened by the many missed opportunities I've had to endure on being excluded from purchasing one of your expertly refined and poured bars. Thanks again for the countless hours of valuable knowledge. Best Regards
They don’t cover shipments outside the USA. So I could end up losing the gold and the payment for the gold in a dispute. Not to imply that you would do such a thing.
@@sreetips I completely understand - however if you made an exception next time you pour a bar I would sign away rights to any damages claim, complete the transaction with a wire transfer or crypto (digital gold) as well as cover the difference for UPS shipping door to door all for one of your coveted "streetips" stamped poured bars :)
I've never been bored by any of your videos, that's for sure. Amazing information you share with everyone. I never got into chemistry as a younger man but sure find it interesting now. Thanks for all you share with us. You have no idea how much we all appreciate your classes on teaching us things we never knew how to do, and without your videos a whole lot of us would have never got a chance to learn any of it.
I have been watching your videos for a couple of years now and its basically the same thing every time processing scrap gold/silver into pure gold/silver yet I am still fascinated and look forward to your videos every time.
He evolved. He gets better equipment, finds new and better processes. He talks to the audience, and keeps refining his refining techniques. Repetition helps drill it into my head, so I have a harder time forgetting. It never gets old for me, either. Almost like 50 First Dates, because I've got CRS.
This channel gets better and better. No way this was done because of lack of available materials , i would suggest this video was made solely for our benefit and to give options to people who struggle to get chemicals. What a great way to share with us and help out . Highly recommended.
You are exactly right. He knows how hard it is to get clean strong chemicals in Canada and the USA. Here it is easier to buy a gun than get nitric acid,, and we are very strict on guns,, ( i disagree with those laws, btw)
With the struggle I had getting nitric, you'll never know how helpful this video was. More time, but good results. Thank you and keep up the good work.
That is fantastic where the gold solution changes from Orange Crush, to lemonade, to clear, and finally dark & stormy - all in a manner of about a minute. Great job, SREETIPS !!
Everytime I see a new Sreetips video it makes my day. Always interesting stuff to watch, and by far the best refining videos out there. Thanks man, for making my day once again.
I liked this type of extraction because it had no nitric acid. And near the end you could see how clear the solution was. It also seems safer to dispose of as well. Nice job!!
Man... Sreetips... I wish I would have found your channel when I was in my college gen chem courses... Might have passed! The little that I did retain makes so much more sense watching you do this! Thanks for the cool video!
It is nice to know there are other chemicals and acids that can be used in the refining of precious metals. When every dollar needs to be stretched a little bit more, this will help someone tremendously. One of these days, or years, I will watch your videos to go through the process. Thank you.
I’m completely mesmerized. Makes me want to take a class. I about died when I saw the final gold piece. You make it look very easy. I want to try but I am so intimidated.
I don’t think that there are classes for refining. And most refiners would rather take their secrets to the grave than share with the masses. I exploit this to have a successful channel. But it makes me a bit of an outcast in the refining community. If I need help then most professional refiners wouldn’t touch me with a ten foot pole. Because they know that anything revealed to me would end up on my channel. As a result I’m completely on my own and completely self-taught. With a little help from those on the goldrefiningforum.com
Wonderful to see this great refining video! Another outstanding bar as well - your pouring technique is top notch. It looked like maybe there were a lot of gold nano particles going over into the waste container after the first to precipitations? But then I just can't imagine your loss is all that high (and of course you recover everything eventually). Great work and great video - I envy the person who ends up with that awesome bar! 👍
I did a small test run with the HCl-bleach method to dissolve gold foils, and that worked very well too. Precipitation with SMB was complete and quick. I will be using sulfuric for IC chips, as they can have silver, gold, platinum, and palladium. Sulfuric helps split up those metals. But, the sulfuric needs to be poured off while still hot or else the silver sulfate will start precipitating if it exceeds the solubility limit at room temp. Sulfuric acid at 96C holds 4X the mass of silver as acid at 24C.
Nice video friend. I just figured this method as well. I also realized not long ago that it is the SO2 reducing the metallic ions in solution, and not necessarily the SMB, or it's elements. SMB's oxidation to SO2 into SO2 oxidation, thus reduction of metallic ions for precipitation. Just wanted to mention it would be AMAZING to get some formula ratios for acid needed per weight of material. I also just got one of those 4000ml flasks which is ironic as well. As always great job!
Going backwards now. The gas really does make the gold pop. Funny bit is I'm sitting on thousands of gallons of all these chems here at work and all the lab gear. Only thing I DON'T have is a fume hood. Out of all the chems here room temp Sulfuric 93% gets my respect the most. It seems to find you and you only notice later when your jeans grow holes :)
That good sir is absolutely beautiful material. I love watching the entire process , it's simply mesmerizing. You really do a great job , and you are a great teacher. Mostly I loved how you changed up the processes. The results are, as you put it simply stunning color. Thanks for the great show today. I think you should be very proud of yourself on this one.
hello again sreetips, i watched this video refine gold using OTC chemicals without nitric. with a lot of patience, there were 59 steps I wrote down so I can try to repeat your gold recovery for jewelry and nuggets. the more I watched your video, the more insight I gleam from it. i feel a lot safer now instead of using nitric acid. by the way, the O'Reilly auto store sells concentrate sulfuric acid for car batteries for only $13.75 it comes in a cardboard box but in a plastic bag container. thanks for your hard work.
Wow, that 3rd gold solution was beautiful -- and so clean. It really shows off why you go to the trouble of refining it 3 times. Triple points for using 3 different methods to drop the gold. Man, those impurities don't stand a chance in hell.
Video definitely shows how dangerous sulfuric acid can be, the importance of a fume hood, and the efficiency of nitric. Thanks Sreetips, have a good one!
It’s takes much longer. It’s more dangerous. The silver is more difficult to recover. And it makes a lot more waste that must be treated before disposal. But at least I know that I can use it in a pinch.
So cool. I've never been great at a chemistry but I can actually follow along with what you did. I do notice you have a hood to vent the gasses out of the room. I remember this from chemistry class in 1980 and the chemistry teachers' reason for doing so.
SO2 gas is better because it keeps impurities out of your reaction flask. The fine gold nanoparticles it produces are also great for any chemical reaction that uses gold because the high surface area will make it super potent as a catalyst. Any time you can use a gas you will get a superior product.
@@matthewcurry3565 Matthew, that SMB sold as "stump remover" is about 98% pure, that's what I've found - In other words, it falls into "industrial grade reagent" category. In industrial chemical processes purity isn't of great importance, so one would be hard pressed to find a list of specific impurities present there. It just doesn't matter, that's it - as long as it removes sumps, who cares? Same when you make soap - it doesn't matter whether NaOH is 99.9% pure or just 97-99% pure - and it neither it matters whether the impurities are NaCl or Na2CO3 or KOH. Or when you're making artificial fertilisers, it doesn't matter whether HNO3 used there is really pure or whether it contains some iron or zinc in it. (Although in case of nitric acid that "industrial grade" is very close in purity to "reagent grade" HNO3, while costing a tenth of the price of the latter, at least "here, where I live" - but I digress here.) Anyway, if you want to know specific impurities (and their amounts) for a given reagent you'd have to look for analytical grade purity, ("p.a.") because only for those reagents there's a specific list of impurities (and their amounts) listed on the label. Even for regular lab reagents, referred to as "pure" (abbreviated "p.", like in "HNO3 p.") impurities are not normally listed. Well, at least that's my experience.
@@MrKotBonifacy alright alright. Thank you for the actual in depth answer on this. So, when their safety data sheet says 100% it is actually around 97-98%? Where did you find that out if you don't mind me asking? I'm curious on seeing basically all data in general for fun haha
@@matthewcurry3565 Glad you appreciated my efforts to clarify the matter. Now, I do not know much about this "version" of SMB sold as a "stump remover" and I never saw SMB safety data sheet. That "98%" figure I saw on Wikipedia (the entry "Sodium metabisulfite" section "Uses") while I was trying to clarify that "meta- / -pyro- / bi- / -sulphites / -sulphates" mess (there are few of those compounds with similarly sounding names but different properties). What I know for fact, however, is that the "technical/ industrial grade" reagents are never really pure, and that's why you normally don't use them in the lab (unless it is a drain opener from a local hardware shop used to unblock clogged drain ;-) Anyway, doing that "trick" with releasing SO2 from SMB with strong acid and then using that SO2 to precipitate gold leaves all eventual impurities behind, away from the precipitated gold. My guess is those impurities would be mainly by-products of the synthesis, i.e. "other" sulphites, sulphates and thiosulphate, plus what came into the synthesis with industrial grade caustic soda (NaOH). I just found a page of PanReac AppliChem (I'm not pasting link here as I suspect YT of blocking comments with links, but you can easily google it), and it says for technical grade of NaOH the impurities are as follow: Insoluble matter in H2O: 0.05 % Chloride (Cl): 0.01% Sulfate (SO4): 0.01% Heavy metals (as Pb): 0.005% As: 0.0003 % Fe: 0.005 % For SMB (they use the name Sodium Disulfite) there's a data sheet only for "pure" and "pure for analysis" grades. For "pure" the impurities are: Insoluble matter in H2O: 0.025 % Chloride (Cl): 0.02% Residual solvents (Ph.Eur/USP): passes test Thiosulfate (BP): passes test Thiosulfate (S2O3): 0.05% Fe: 0.002 % OK. 'nuff on it. Cheers.
I get offer a place in chemical scool 40 year ago..... I regret that i say No. But thats life. Thanks fore all i have learn in this canel. Take care sir😊👍
I’m a retired Navy Engineer. I have a Bachelors in Aviation. I took a chemistry class in high school almost 50 years ago - got a “D” - you don’t need a degree in chemistry to be able to refine precious metals.
Ok. That was interesting to hear. In Norway i think it very strikt to by many of your chemical you using to refining the gold. It is a shame, but i can understand it. Strong and dangeres in Rong hands😊 Thanks fore sharing whit me.
Wow that was another great video St, so much information and just so easy to watch I couldn't even step away and I didn't even realize how long the video was and it was over great job..👍🤔😄🥃
In a pinch I made a dripping apparatus a little different from yours because I don't have anything like that but I used a piece of aquarium tubing that you would use for a bubbler and after starting a siphon I tied a knot in it and just simply loosen the knot for a faster drip and tighten the knot for a slower one
I put some computer finger connections in 50ml Hydrocloric and 10ml 25% h2o224 hours ago. 60% of the flakes have released already. I made the 25% h2o2 from 3% stuff, So far so good! Thanks
Something you could do, you've got a vacuum filter, after you've precipitated the gold out of solution you could stick a paper filter in the vacuum and drain the wash off. Then burn the filter, when you melt the sludge.
very nice little gold bar, nicest yet :) too bad we in Europe can't buy one from you. On a separate note, I'd say it's pretty neat of you to show there are alternative ways to refining gold than the "classic" nitric acid method
Great information. Just getting started in the gold recovery process. I have about 20 lbs of circuit boards and am gathering the necessary tools needed to do so. I like how you incorporate everything into a video. Good or bad. Nice to see if a mistake is made and how to fix it
@@sreetipsOh that's kinda shame but I understand. So if I were to use this process with concentrated sulfuric acid on IC chips it should work because there are no metals present other then copper, gold, maybe some silver. But now that I think about it would tin presence harm the reaction in any way? And if so how to get rid of it? How would this process work with tantalum capacitors? Edit: Scratch that thats stupid idea. Tantalum can't be refined like this. How about palladium from mlccs or other capacitors? How would you precipitate the palladium out of the solution? I enjoy your videos because I'd like to start doing metal recovery as well, but I don't have any experience in this field except for basic anorganic chemistry (school stuff) So any info is greatly appreciated 👍
Seems like the suferic acid is more dangerous than the Nitric Acid and personally it's harder to get rid of the silver as it seems to be making some sort of white powder at the bottom.
Just thought of something. If you keep getting contaminants check that your stir sticks not wore out / pinhole in it. I imagine that would contaminate. I'm probably 20 hours into your videos, I have been collecting junk gold every now and then think I'll be ready in a few months.
The Inquartation method is a standard process, although nitric acid is usually used instead of sulfuric. The major shortcoming of not using nitric is the long processing times, which tend to increase the percentage of micro/nano particles of gold that can be lost in the acid replenishment and wash/filtering steps. If steps are taken for waste recovery, as Sreetips does, then this loss is less of a concern.
So I have a question/suggestion. From your various refinings and the calculations of estimated yields; do you keep track of the missing percentage to see how much you get back after a waste bucket treatment? It might just be me but I'd be interested in seeing total approximate loss to the bucket and then the recovered yield from the bucket.
Another thing this very spooky looking is watching Nile Reds video of piranha solution eating a chicken leg bone and all in a couple of minutes. It's a rather violent reaction in the solution gets black as it turns the meat into carbon and then the carbon into carbon dioxide gas dissipates and he's behind a clean clear piranha solution like nothing was even there. I've wondered if it could be used like aqua regia but on the gold refining forum they're hell-bent on destroying it so I don't expect any useful information on how to go about figuring out a way to use it as a substitute for aqua regia so I guess I'll have to inevitably figure that out the hard way but I am gaining some useful insights from this thanks to you and if you ever decide to do one with full-blown piranha solution in place of aqua regia I'll be sure and check that one out
Thank you, Mr., Sreetips. I am probing alternatives for the recovery steps. Most of my source falls under the computer eWaste umbrella. Rarely i get some gold-filled scrap when I have a super cheap offer. My challenge is to use Nitric in the recovery is getting economically unviable for me now that my hobby has gotten serious. I am using Sodium Nitrate more for the first refine step as well and trying to eliminate completely the use of Nitric before the second refine step. The issue is the high proportion of Silver in eWaste and scrap jewelry. I gave up on refining Silver, I just keep Silver containing droppings (in any form of salt or elemental) in a special container for later recovery when the volume justifies so. Killing base metals with HCl, with HCl/diluted H2O2 has been effective to me .... except when the Silver amount is enough to kill me. I have an exceptionally large amount of Lab-grade ultra-pure Sulfuric acid (one day I tell the tale why), that might be an alternative for me. I use it mostly when I have a large volume of integrated circuits and I want to get too wet etch them. Even though the waste volume when using Sulfuric is enormous for me, I will likely try one time to probe to see if my ops cost keeps low.
I sure haven't been here in a very long time old friend. You always have sooooo much to teach us. If I was to send you around 40 ozt of filings and saw cuttings of 3 and 4 9's silver can you clean it up and send me back whatever you feel is fair ? The material you generated is highly pourable silver my friend.
@@sreetips All good but now I have bladder cancer they are trying 6o get taken care of. This last year has been a doozie old friend. I wonder where my journey will take me now eh.
@@sreetips I kind of see Hydrochloric as that aunt that grew up on a farm. She can be super dangerous if you are a jerk with her, but she's skilled in a wide variety of things. She's married to the mean Drunk Uncle and can reason with him.
There's a different brand sulfuric acid available at Walmart for about the same price that is between 97 and 98 percent just in case anyone feels there would be a benefit to having something a little stronger, and I also just found a source of 30% hydrogen peroxide delivered UPS ground Freight for $26 per gallon ($10 and change for product + $15 and change for shipping) which is a hell of a lot better than any other prices I've seen lately for those who like me can't seem to find a local source for pickup
I doubt if very much gold was dissolved by the sulfuric acid. It was mostly lost due to the extended boils where a lot of micro/nano particles were produced - and they got poured off during the acid changes. Since the main idea of this process is to minimize such gold particle losses, it works best if the inquarted gold is uniform shot, not a bunch of random sized particles.
I was just thinking about this type of project this morning, I have a 18k necklace I need to refine to 24k so I can use the gold to fume glass for Christmas ornaments
Also, how is HCl + H202 dissolving gold, is it the heat or the absence of base metals, a bit confused as HCl + H202 is the RAM finger strip that doesn't dissolve gold. Thanks for your time as you always answer and all the best Mr Sreetips.
I like how this process broke the gold down immediately into a slush. But I feel like you skipped steps to ensure maximum yield. I know you'll get it later, but...I'm also curious if this different combination of extraction effects your later silver extraction?
If I'm not mistaken if you were to add sodium chloride regular uniodized table salt or something like the pink Himalayan sea salt you end up with hydrochloric acid
Dear sreetips I've been in channel for a long time a i enjoyed every second of your videos. I wish you could make more electronic waste refining videos. Sincerely Mohammad hosein
My advice; get a fume hood first. I ignored this for my first year. Refined in my back yard. Today I have impaired lung function because I ignored this critical piece of equipment. No way to safely do these reactions without a fume hood.
I heard that using Peroxide & Hydrochloric acid is better for refining than using Nitric acid... I think Nitric allows too many base metals to remain... or better oxidation.. Maybe a suggestion for a new video for you if you haven't done this already to determine which refining method is more pure.. Also some suggestions as to handle emergency situations if you spill sulphuric acid on yourself by accident or what kind of symptoms to watch for from inhaling too many fumes, etc..
Mr Tips. Can you tutor my daughter on neat hand writing please ? You have the neatest hand writing I have seen in a long time. I guess it is a generational thing ? I did like the video though
Have you considered using a closed system and nitric acid - so you could recover the NO2 and reconvert it back to nitric acid? It would eliminate discharging all that NO2 into the atmosphere.
@@sreetips Here are the relevant formulas: 4 NO2 + 2 H2O → 2 HNO3 + NO + NO2 + H2O So the net reaction is 3 NO2 + H2O → 2 HNO3 + NO The nitric oxide is reoxidized by the oxygen in air (or an O2 feed) to produce additional nitrogen dioxide. Note that water is used up in the reaction. Some will come over during the nitration, but more will probably be necessary. By bubbling NO2 through hydrogen peroxide, the yield is better. 2 NO2 + H2O2 → 2 HNO3 NO + H2O2 → NO2 + H2O All this can be done at ambient pressure, so there is no risk of blowing up your equipment. You may have to control the reaction vessel temperature. Since you use incremental additions of nitric acid for nitrations, the water formed with the H2O2 process shouldn't be any problem.
I really wish the bars you have produced in each video were X-Ray Xrf Spectrometer Analyzed. It would be interesting to see the randomized data. Perhaps Santa will be good to you this year...L0L
I kinda stumbled on the peroxide + acid combo while messing around with electrochemical reactions on my bench, you can actually etch copper PCB material pretty effectively with a warm solution of 3% H2O2 and 6% vinegar, never even considered the same idea could work on gold. I've been wanting to try gold recovery but ni tric is so hard to come by and expensive in "hobby" quantities (and making it is really only viable for me in tiny
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Mr Kevin, what amazes me more than any acid reaction, any precipitation, or any purity of gorgeous gold powder is your honesty and genuineness. In these days of videos flooding the internet with the sole purpose of deceiving viewers and people just wanting to make themselves appear special or skilled, here you are bringing REAL, HONEST content time and time again that's not just thoroughly informative and educational, it's very much exciting and incredibly wholesome. You Sir are one in a bilion, you're worth more than all the gold you've ever refined, you make the world a better place every day. You're truly an amazing individual, I hope you know that and never forget it. The entire internet says THANK YOU!!!!
Thank you, it’s statements like this that lift me up when I get discouraged. May God bless you for your kind words.
@@sreetipsyou, sir, are a very talented and impressive man - congratulations to you on your skills and your communications ability... most entertaining as well...
I've been absorbing, learning from and watching every video you've posted for little over five years now but this is the first time I'll be reaching out and leaving a comment on one of your many videos.
Thank you so much for everything you do and the knowledge and patience and time you take to walk us through not only your step by step procedures but also your thought process and reasoning behind why you're doing what you're doing.
As a Canadian I am only saddened by the many missed opportunities I've had to endure on being excluded from purchasing one of your expertly refined and poured bars.
Thanks again for the countless hours of valuable knowledge.
Best Regards
They don’t cover shipments outside the USA. So I could end up losing the gold and the payment for the gold in a dispute. Not to imply that you would do such a thing.
@@sreetips I completely understand - however if you made an exception next time you pour a bar I would sign away rights to any damages claim, complete the transaction with a wire transfer or crypto (digital gold) as well as cover the difference for UPS shipping door to door all for one of your coveted "streetips" stamped poured bars :)
I've never been bored by any of your videos, that's for sure. Amazing information you share with everyone. I never got into chemistry as a younger man but sure find it interesting now. Thanks for all you share with us. You have no idea how much we all appreciate your classes on teaching us things we never knew how to do, and without your videos a whole lot of us would have never got a chance to learn any of it.
I have been watching your videos for a couple of years now and its basically the same thing every time processing scrap gold/silver into pure gold/silver yet I am still fascinated and look forward to your videos every time.
He evolved. He gets better equipment, finds new and better processes. He talks to the audience, and keeps refining his refining techniques. Repetition helps drill it into my head, so I have a harder time forgetting. It never gets old for me, either. Almost like 50 First Dates, because I've got CRS.
This channel gets better and better.
No way this was done because of lack of available materials , i would suggest this video was made solely for our benefit and to give options to people who struggle to get chemicals.
What a great way to share with us and help out .
Highly recommended.
You are exactly right. He knows how hard it is to get clean strong chemicals in Canada and the USA. Here it is easier to buy a gun than get nitric acid,, and we are very strict on guns,, ( i disagree with those laws, btw)
With the struggle I had getting nitric, you'll never know how helpful this video was. More time, but good results. Thank you and keep up the good work.
@@birddog0 very true but the shipping cost at times can be almost as high as the acid it self
That is fantastic where the gold solution changes from Orange Crush, to lemonade, to clear, and finally dark & stormy - all in a manner of about a minute. Great job, SREETIPS !!
Everytime I see a new Sreetips video it makes my day. Always interesting stuff to watch, and by far the best refining videos out there. Thanks man, for making my day once again.
I agree , he puts out some of the best videos very informative and right to the point.
I never get tired of watching the SMB reaction. I love to see the first spoonful going in and seeing that instant color change .👍👍
The level of satisfaction i get from watching a master at work is no less then if I watched Picasso or DaVinci in their prime. Thank you.
I liked this type of extraction because it had no nitric acid. And near the end you could see how clear the solution was. It also seems safer to dispose of as well. Nice job!!
Man... Sreetips... I wish I would have found your channel when I was in my college gen chem courses... Might have passed! The little that I did retain makes so much more sense watching you do this! Thanks for the cool video!
Great to see how well the OTC chemicals only worked on this refining 👏👏👏
It is nice to know there are other chemicals and acids that can be used in the refining of precious metals. When every dollar needs to be stretched a little bit more, this will help someone tremendously. One of these days, or years, I will watch your videos to go through the process. Thank you.
I’m completely mesmerized. Makes me want to take a class. I about died when I saw the final gold piece. You make it look very easy. I want to try but I am so intimidated.
I don’t think that there are classes for refining. And most refiners would rather take their secrets to the grave than share with the masses. I exploit this to have a successful channel. But it makes me a bit of an outcast in the refining community. If I need help then most professional refiners wouldn’t touch me with a ten foot pole. Because they know that anything revealed to me would end up on my channel. As a result I’m completely on my own and completely self-taught. With a little help from those on the goldrefiningforum.com
Wonderful to see this great refining video! Another outstanding bar as well - your pouring technique is top notch. It looked like maybe there were a lot of gold nano particles going over into the waste container after the first to precipitations? But then I just can't imagine your loss is all that high (and of course you recover everything eventually). Great work and great video - I envy the person who ends up with that awesome bar! 👍
Excellent tutorial for using over the counter chemicals for refining. So many people live where nitric acid is illegal.
Chemistry is just fascinating. The gas bubbler contraption is amazing.
when the spoon went in all i could hear in my head is the wicked witch of the west screaming "Im Meltingggg, Meltinggggg"
Made me think of Terminator 2
I did a small test run with the HCl-bleach method to dissolve gold foils, and that worked very well too. Precipitation with SMB was complete and quick.
I will be using sulfuric for IC chips, as they can have silver, gold, platinum, and palladium. Sulfuric helps split up those metals. But, the sulfuric needs to be poured off while still hot or else the silver sulfate will start precipitating if it exceeds the solubility limit at room temp.
Sulfuric acid at 96C holds 4X the mass of silver as acid at 24C.
An important refining nugget - good to know.
Interesting, how do you separate palladium and platinum from the sulfuric acid though?
Please share I d like to know.
I don’t like working with sulfuric acid. It’s gooey, gets all over everything, and causes problems with waste treatment.
Awesome way to show a different approach to refining without nitric as shipping costs have skyrocketed 👍 kudos
Nice video friend. I just figured this method as well. I also realized not long ago that it is the SO2 reducing the metallic ions in solution, and not necessarily the SMB, or it's elements. SMB's oxidation to SO2 into SO2 oxidation, thus reduction of metallic ions for precipitation. Just wanted to mention it would be AMAZING to get some formula ratios for acid needed per weight of material. I also just got one of those 4000ml flasks which is ironic as well. As always great job!
Going backwards now. The gas really does make the gold pop. Funny bit is I'm sitting on thousands of gallons of all these chems here at work and all the lab gear. Only thing I DON'T have is a fume hood. Out of all the chems here room temp Sulfuric 93% gets my respect the most. It seems to find you and you only notice later when your jeans grow holes :)
This is amazing to me I would like to thank you Sreetips for letting us follow you along
That good sir is absolutely beautiful material. I love watching the entire process , it's simply mesmerizing. You really do a great job , and you are a great teacher. Mostly I loved how you changed up the processes. The results are, as you put it simply stunning color. Thanks for the great show today. I think you should be very proud of yourself on this one.
@ 9:32 "That's spooky lookin'"... Yeah, no kidding... I was like, whoa....
Too bad he didn't release this on Halloween. :-)
hello again sreetips, i watched this video refine gold using OTC chemicals without nitric. with a lot of patience, there were 59 steps I wrote down so I can try to repeat your gold recovery for jewelry and nuggets. the more I watched your video, the more insight I gleam from it. i feel a lot safer now instead of using nitric acid. by the way, the O'Reilly auto store sells concentrate sulfuric acid for car batteries for only $13.75 it comes in a cardboard box but in a plastic bag container. thanks for your hard work.
Boiling sulfuric is very dangerous - will go to the bone if it gets on you. And not right away.
Wow, that 3rd gold solution was beautiful -- and so clean. It really shows off why you go to the trouble of refining it 3 times. Triple points for using 3 different methods to drop the gold. Man, those impurities don't stand a chance in hell.
12:30. "Our gold down there looks......like inquarted gold that's been parted with a acid !" Made my morning, thanks !
Video definitely shows how dangerous sulfuric acid can be, the importance of a fume hood, and the efficiency of nitric. Thanks Sreetips, have a good one!
это не азотная кислота,а концентрированная СЕРНАЯ 93%
I couldn’t believe how well it worked.
@@sreetips it did work well. I'm excited to see how you utilize this new methodology in the future.
It’s takes much longer. It’s more dangerous. The silver is more difficult to recover. And it makes a lot more waste that must be treated before disposal. But at least I know that I can use it in a pinch.
So cool. I've never been great at a chemistry but I can actually follow along with what you did.
I do notice you have a hood to vent the gasses out of the room. I remember this from chemistry class in 1980 and the chemistry teachers' reason for doing so.
You’d be dead without a hood.
My disappointment that you didn't marker "SREETIPS" onto the masking tape is immeasurable.
I’ll do better next time
I immediately thought the same thing haha
😂😂😂😂
I'm telling you I'd buy "SREETIPS" brand lab and corning ware, chemicals, tape etc Absolutely!
😂😂😂
Scholar of the craft! Pleasure to watch, learn, and be instructed by kind sir.
Answered in the same video, needed to watch to the end. Thanks!
Buy the way I watch all your videos again and again and really appreciate you sharing your hard earned knowledge
Thank you
SO2 gas is better because it keeps impurities out of your reaction flask. The fine gold nanoparticles it produces are also great for any chemical reaction that uses gold because the high surface area will make it super potent as a catalyst. Any time you can use a gas you will get a superior product.
Would you mind sharing the impurities that may be present in SMB to SO2's reaction?
I don’t know those impurities
@@matthewcurry3565 Matthew, that SMB sold as "stump remover" is about 98% pure, that's what I've found - In other words, it falls into "industrial grade reagent" category. In industrial chemical processes purity isn't of great importance, so one would be hard pressed to find a list of specific impurities present there. It just doesn't matter, that's it - as long as it removes sumps, who cares?
Same when you make soap - it doesn't matter whether NaOH is 99.9% pure or just 97-99% pure - and it neither it matters whether the impurities are NaCl or Na2CO3 or KOH. Or when you're making artificial fertilisers, it doesn't matter whether HNO3 used there is really pure or whether it contains some iron or zinc in it. (Although in case of nitric acid that "industrial grade" is very close in purity to "reagent grade" HNO3, while costing a tenth of the price of the latter, at least "here, where I live" - but I digress here.)
Anyway, if you want to know specific impurities (and their amounts) for a given reagent you'd have to look for analytical grade purity, ("p.a.") because only for those reagents there's a specific list of impurities (and their amounts) listed on the label. Even for regular lab reagents, referred to as "pure" (abbreviated "p.", like in "HNO3 p.") impurities are not normally listed. Well, at least that's my experience.
@@MrKotBonifacy alright alright. Thank you for the actual in depth answer on this. So, when their safety data sheet says 100% it is actually around 97-98%?
Where did you find that out if you don't mind me asking? I'm curious on seeing basically all data in general for fun haha
@@matthewcurry3565 Glad you appreciated my efforts to clarify the matter. Now, I do not know much about this "version" of SMB sold as a "stump remover" and I never saw SMB safety data sheet. That "98%" figure I saw on Wikipedia (the entry "Sodium metabisulfite" section "Uses") while I was trying to clarify that "meta- / -pyro- / bi- / -sulphites / -sulphates" mess (there are few of those compounds with similarly sounding names but different properties). What I know for fact, however, is that the "technical/ industrial grade" reagents are never really pure, and that's why you normally don't use them in the lab (unless it is a drain opener from a local hardware shop used to unblock clogged drain ;-)
Anyway, doing that "trick" with releasing SO2 from SMB with strong acid and then using that SO2 to precipitate gold leaves all eventual impurities behind, away from the precipitated gold. My guess is those impurities would be mainly by-products of the synthesis, i.e. "other" sulphites, sulphates and thiosulphate, plus what came into the synthesis with industrial grade caustic soda (NaOH). I just found a page of PanReac AppliChem (I'm not pasting link here as I suspect YT of blocking comments with links, but you can easily google it), and it says for technical grade of NaOH the impurities are as follow:
Insoluble matter in H2O: 0.05 %
Chloride (Cl): 0.01%
Sulfate (SO4): 0.01%
Heavy metals (as Pb): 0.005%
As: 0.0003 %
Fe: 0.005 %
For SMB (they use the name Sodium Disulfite) there's a data sheet only for "pure" and "pure for analysis" grades. For "pure" the impurities are:
Insoluble matter in H2O: 0.025 %
Chloride (Cl): 0.02%
Residual solvents (Ph.Eur/USP): passes test
Thiosulfate (BP): passes test
Thiosulfate (S2O3): 0.05%
Fe: 0.002 %
OK. 'nuff on it. Cheers.
I get offer a place in chemical scool 40 year ago..... I regret that i say No. But thats life.
Thanks fore all i have learn in this canel. Take care sir😊👍
I’m a retired Navy Engineer. I have a Bachelors in Aviation. I took a chemistry class in high school almost 50 years ago - got a “D” - you don’t need a degree in chemistry to be able to refine precious metals.
Ok. That was interesting to hear. In Norway i think it very strikt to by many of your chemical you using to refining the gold.
It is a shame, but i can understand it. Strong and dangeres in Rong hands😊
Thanks fore sharing whit me.
Cool necklace, and a nice way of extracting the gold.
You’re the best so far what i watched on you tube, very explanatory A1 to you and just very understandable,thank you
Wow that was another great video St, so much information and just so easy to watch I couldn't even step away and I didn't even realize how long the video was and it was over great job..👍🤔😄🥃
In a pinch I made a dripping apparatus a little different from yours because I don't have anything like that but I used a piece of aquarium tubing that you would use for a bubbler and after starting a siphon I tied a knot in it and just simply loosen the knot for a faster drip and tighten the knot for a slower one
The SMB 'flash over' is always my Fav. part
I put some computer finger connections in 50ml Hydrocloric and 10ml 25% h2o224 hours ago. 60% of the flakes have released already. I made the 25% h2o2 from 3% stuff, So far so good! Thanks
Something you could do, you've got a vacuum filter, after you've precipitated the gold out of solution you could stick a paper filter in the vacuum and drain the wash off. Then burn the filter, when you melt the sludge.
very nice little gold bar, nicest yet :) too bad we in Europe can't buy one from you. On a separate note, I'd say it's pretty neat of you to show there are alternative ways to refining gold than the "classic" nitric acid method
Obviously not as efficient and effective as nitric, but the end result is the same and less cleanup. Interesting. . . Great video as always!
A real Gold Gurú!! My respect Sir. I really enjoyed and learned. 🙌👏👏👏
Fantastic work! I really enjoyed watching this one. Thank you Streetips!!
Excellent!
Great information. Just getting started in the gold recovery process. I have about 20 lbs of circuit boards and am gathering the necessary tools needed to do so. I like how you incorporate everything into a video. Good or bad. Nice to see if a mistake is made and how to fix it
Could you make so videos on circuit board gold recovery please?
The amount of gold is very low, and the waste is high. So I don’t refine very much escrap these days.
@@sreetipsOh that's kinda shame but I understand.
So if I were to use this process with concentrated sulfuric acid on IC chips it should work because there are no metals present other then copper, gold, maybe some silver. But now that I think about it would tin presence harm the reaction in any way? And if so how to get rid of it?
How would this process work with tantalum capacitors?
Edit: Scratch that thats stupid idea. Tantalum can't be refined like this.
How about palladium from mlccs or other capacitors?
How would you precipitate the palladium out of the solution?
I enjoy your videos because I'd like to start doing metal recovery as well, but I don't have any experience in this field except for basic anorganic chemistry (school stuff)
So any info is greatly appreciated 👍
I can't wait for the video where you refine that button down shirt you're wearing...
I’m planning on offering it for sale on my eBay site.
Now you have your very own jeweler's "scrap". Great video!
This is my new favorite method of refinement, peroxide rules. Iron removal is a pain but no nitric is great...
I live your videos! They are so informative. I love Gold ❤
GOLD!
Seems like the suferic acid is more dangerous than the Nitric Acid and personally it's harder to get rid of the silver as it seems to be making some sort of white powder at the bottom.
Just thought of something. If you keep getting contaminants check that your stir sticks not wore out / pinhole in it. I imagine that would contaminate. I'm probably 20 hours into your videos, I have been collecting junk gold every now and then think I'll be ready in a few months.
It is many ways to Rome, some of them are short, some of them are Long.
This was a longe way.
Exelent woork my friend😊👍
One of the best channels on TH-cam by far!
i should have watched until the end before commenting the first time lolol. That is a beautiful set you made with the bar and earrings nice touch.
I honestly didn't know you could do that with sulfuric 👍
Excellent information sreetips, thank you
The Inquartation method is a standard process, although nitric acid is usually used instead of sulfuric. The major shortcoming of not using nitric is the long processing times, which tend to increase the percentage of micro/nano particles of gold that can be lost in the acid replenishment and wash/filtering steps. If steps are taken for waste recovery, as Sreetips does, then this loss is less of a concern.
So I have a question/suggestion. From your various refinings and the calculations of estimated yields; do you keep track of the missing percentage to see how much you get back after a waste bucket treatment? It might just be me but I'd be interested in seeing total approximate loss to the bucket and then the recovered yield from the bucket.
Since I only refine my own material I don’t keep track because I know that I can get it back from my waste container
Simply beautiful... process and result!
Another thing this very spooky looking is watching Nile Reds video of piranha solution eating a chicken leg bone and all in a couple of minutes.
It's a rather violent reaction in the solution gets black as it turns the meat into carbon and then the carbon into carbon dioxide gas dissipates and he's behind a clean clear piranha solution like nothing was even there. I've wondered if it could be used like aqua regia but on the gold refining forum they're hell-bent on destroying it so I don't expect any useful information on how to go about figuring out a way to use it as a substitute for aqua regia so I guess I'll have to inevitably figure that out the hard way but I am gaining some useful insights from this thanks to you and if you ever decide to do one with full-blown piranha solution in place of aqua regia I'll be sure and check that one out
Anyone investing in precious metals would be hard pressed to find any finer metals than what this man creates.
Thank you, Mr., Sreetips. I am probing alternatives for the recovery steps. Most of my source falls under the computer eWaste umbrella. Rarely i get some gold-filled scrap when I have a super cheap offer.
My challenge is to use Nitric in the recovery is getting economically unviable for me now that my hobby has gotten serious. I am using Sodium Nitrate more for the first refine step as well and trying to eliminate completely the use of Nitric before the second refine step.
The issue is the high proportion of Silver in eWaste and scrap jewelry. I gave up on refining Silver, I just keep Silver containing droppings (in any form of salt or elemental) in a special container for later recovery when the volume justifies so.
Killing base metals with HCl, with HCl/diluted H2O2 has been effective to me .... except when the Silver amount is enough to kill me.
I have an exceptionally large amount of Lab-grade ultra-pure Sulfuric acid (one day I tell the tale why), that might be an alternative for me. I use it mostly when I have a large volume of integrated circuits and I want to get too wet etch them.
Even though the waste volume when using Sulfuric is enormous for me, I will likely try one time to probe to see if my ops cost keeps low.
используй АММИАК, и медь с серебром уйдут в раствор,а фульминат золота перерастворяй промыв дисцилятом( неоставляй сохнуть! взрыв)
When the gold looks just like mud it amazes me how it changes to shining pure gold once heated.
I sure haven't been here in a very long time old friend. You always have sooooo much to teach us. If I was to send you around 40 ozt of filings and saw cuttings of 3 and 4 9's silver can you clean it up and send me back whatever you feel is fair ? The material you generated is highly pourable silver my friend.
Hello Dean, hope all is well with you.
@@sreetips All good but now I have bladder cancer they are trying 6o get taken care of. This last year has been a doozie old friend. I wonder where my journey will take me now eh.
@@sreetips I didn't see Silver Mack below. Do you two both chat on occasion ?
I try to answer if folks have questions. Please check your email.
@@sreetips Allways bud.
If nitric acid is the mean, drunk, uncle of the common acids, Sulfuric is that weird cousin that doesn't like people and makes everyone nervous.
And hydrochloric?
@@sreetips That's your aunt with the voice that irritates everyone, but she means well. :-)
I can't tell if H2SO4 or HNO3 is worse. Both those 2 are just a serious no no for me. Do you prefer fire water, or NOX, and more fiery water?
@@sreetips I kind of see Hydrochloric as that aunt that grew up on a farm. She can be super dangerous if you are a jerk with her, but she's skilled in a wide variety of things. She's married to the mean Drunk Uncle and can reason with him.
@@matthewcurry3565 Actually, I prefer H2O2, or straight ozone. But I'm a research chemist, not a refiner. I.E. I don't do things at scale.
There's a different brand sulfuric acid available at Walmart for about the same price that is between 97 and 98 percent just in case anyone feels there would be a benefit to having something a little stronger, and I also just found a source of 30% hydrogen peroxide delivered UPS ground Freight for $26 per gallon ($10 and change for product + $15 and change for shipping) which is a hell of a lot better than any other prices I've seen lately for those who like me can't seem to find a local source for pickup
So you "lost" ~1.5g along the way. ~10%. I imagine most of that was what went back into solution and should be recoverable. Neat process.
I doubt if very much gold was dissolved by the sulfuric acid. It was mostly lost due to the extended boils where a lot of micro/nano particles were produced - and they got poured off during the acid changes. Since the main idea of this process is to minimize such gold particle losses, it works best if the inquarted gold is uniform shot, not a bunch of random sized particles.
I was just thinking about this type of project this morning, I have a 18k necklace I need to refine to 24k so I can use the gold to fume glass for Christmas ornaments
Also, how is HCl + H202 dissolving gold, is it the heat or the absence of base metals, a bit confused as HCl + H202 is the RAM finger strip that doesn't dissolve gold. Thanks for your time as you always answer and all the best Mr Sreetips.
It confused me also. Bubbling A/P cold won’t put gold in solution. But add lots of heat and it will dissolve gold.
@@sreetips You are one kind, proffesional guy, If ever I'm in the States again I'll send you and your wife a gift...thanks, keep making these videos.
Wow that's beautiful jewelry I would buy that all day long you should really think about making high quality jewelry you have the talent to do so
Excellent, thank you
I like how this process broke the gold down immediately into a slush. But I feel like you skipped steps to ensure maximum yield. I know you'll get it later, but...I'm also curious if this different combination of extraction effects your later silver extraction?
Really like this method I bet it is a lot cheaper than traditional as well , 👍👍
welcome back thought you where gone for good
Outstanding video! You went above and beyond!
It is cheaper but it seems like it takes longer. Thanks for sharing with us. Happy holidays
If I'm not mistaken if you were to add sodium chloride regular uniodized table salt or something like the pink Himalayan sea salt you end up with hydrochloric acid
Most helpful yet thank you. 🇨🇦
Dear sreetips
I've been in channel for a long time a i enjoyed every second of your videos.
I wish you could make more electronic waste refining videos.
Sincerely Mohammad hosein
Awesome! 10.8 grams of gold. Likely $650 for the bar itself. Good looking Bar too!
I'm a new refiner and your videos are great I'm having some trouble starting out though
My advice; get a fume hood first. I ignored this for my first year. Refined in my back yard. Today I have impaired lung function because I ignored this critical piece of equipment. No way to safely do these reactions without a fume hood.
Pretty gold! Lot of effort extracting it.
I heard that using Peroxide & Hydrochloric acid is better for refining than using Nitric acid... I think Nitric allows too many base metals to remain... or better oxidation..
Maybe a suggestion for a new video for you if you haven't done this already to determine which refining method is more pure..
Also some suggestions as to handle emergency situations if you spill sulphuric acid on yourself by accident or what kind of symptoms to watch for from inhaling too many fumes, etc..
Yep, that's silver sulfate. It dissolves at first when it forms in hot acid, and then precipitates.
Mr Tips. Can you tutor my daughter on neat hand writing please ? You have the neatest hand writing I have seen in a long time. I guess it is a generational thing ? I did like the video though
Oh My Sreetips, that turned out to be. I believe your best looking gold so far. Neat stuff. Merry Christmas if we don't hear from you before then.
Same to you - Merry Christmas
Love watching your shows.
Have you considered using a closed system and nitric acid - so you could recover the NO2 and reconvert it back to nitric acid? It would eliminate discharging all that NO2 into the atmosphere.
No, I haven’t. But it’s not a bad idea.
@@sreetips Here are the relevant formulas:
4 NO2 + 2 H2O → 2 HNO3 + NO + NO2 + H2O So the net reaction is 3 NO2 + H2O → 2 HNO3 + NO
The nitric oxide is reoxidized by the oxygen in air (or an O2 feed) to produce additional nitrogen dioxide. Note that water is used up in the reaction. Some will come over during the nitration, but more will probably be necessary.
By bubbling NO2 through hydrogen peroxide, the yield is better.
2 NO2 + H2O2 → 2 HNO3 NO + H2O2 → NO2 + H2O
All this can be done at ambient pressure, so there is no risk of blowing up your equipment. You may have to control the reaction vessel temperature.
Since you use incremental additions of nitric acid for nitrations, the water formed with the H2O2 process shouldn't be any problem.
Absolutely gorgeous
Eveyrone whit interesting in refining of gold should follow and sport this exelent camal👍
Good Christmas to your all😊
I really wish the bars you have produced in each video were X-Ray Xrf Spectrometer Analyzed. It would be interesting to see the randomized data. Perhaps Santa will be good to you this year...L0L
I kinda stumbled on the peroxide + acid combo while messing around with electrochemical reactions on my bench, you can actually etch copper PCB material pretty effectively with a warm solution of 3% H2O2 and 6% vinegar, never even considered the same idea could work on gold. I've been wanting to try gold recovery but ni tric is so hard to come by and expensive in "hobby" quantities (and making it is really only viable for me in tiny
Very nice work. I grew up in my moms
Lab. As a beginner in gold refining and processing it was enjoyable watching you work. Very professional Thanks
You should do this again and add 50% , 3% peroxide... does same thing just faster
Instead of using a small beaker for your HCl/H20 test solution, use a small test tube. It will require much less test solution.
Yeah, the white precipitate is silver sulfate, but the blue-ish color of the solution is given by copper sulfate.
wow the SO2 gas drop was interesting to watch
Thank u sir! I’ve been needing this video! This will prolly be my method
One thing I have noticed playing around with the sulfuric acid is there's really no need to heat it so no hot plate required
I had to get mine real hot because I dissolve the silver.