Say you had an absolutely pristine new beaker, would it nucleate somewhere because of the disturbance caused by the gas or would it crash all at once like supercooled water does?
@@gabrielribeiro3166 microscopically there is no such thing as pristine glass, the nucleation sites would just start smaller and look more frost like. Or sometimes you get a weird concentration/cooling issue where the nucleation sites won’t appear and you have to add a seed crystal or something else to get it to crash out. Like those hot ice videos or the ones where they supercool water and then as it pours out it freezes. Changes in temp, pressure, movement, and a surface for the newly formed crystals to nucleate to are the main factors.
The gold precipitated by the gas had the same appearance as the one precipitated with oxalic acid in another video of yours. Thank you for more this refining class.
I have to say of the many times I've watched you do refining on gold the two times you've used the gas have been my favorite and both of the bars turned out immaculate. I know it takes extra steps but wow at the end product.
It's not a practical consideration but a visual one... I'd like to see this done with the pregnant solution and the ambient environment it's sitting in just containing SO2... Get it clear with bubbling first so it's right on the fence, then just have it trapped in a chamber... I'm thinking the gold would only want to form at the surface, and fall out as it aggregates and gets heavy enough to go down. Real gold rain lol
*So2 Gas precipitation not only yields purer Gold powder, but it is also more efficient in its precipitation reaction, thus, dropping more Gold out of solution 👍. That pure Gold bar is worth about $3945.53 USD. Not bad Mike 👍😃*
Hey Sreetips, just wanted to let you know how much I love your videos. When I took chemistry in high school, my teacher was verbally abusive and I didn’t learn anything. Your videos have shown me that science and chemistry is actually beautiful and interesting! I’ve even decided to take an entry level chemistry class my next semester at college because of you and your videos! Thank you, and wish me luck!
Dig the new setup, i.e. fume hood, light, etc. The SMB gas reaction is incredible. Amazing how whatever changes are happening to Gold makes the solution go clear then brown. Also the melts are beautiful when you are not using filters. That was one beautiful bar this go around.
It's really hard for a layman like me to wrap my head around that. You have a colored solution, miraculously goes clear (yet still has that much gold in solute) then goes brown and all in a flash. I have a hard enough time accepting it just changing colors like that, but the clear thing explodes my head. A few hundred years ago I would probably accuse him of witchcraft!
I asked you maybe someone else as well, but thank you for doing this procedure for us and like you said it is a remarkable outcome and very beautiful results. I especially like the part where it turns brown quickly and out of nowhere the 4 9's fine collects in the bottom with no rinses needed. Your the best Mr. Street Tips.
I dont know anything about any of the things you are doing but it is super interesting to follow along and listen to you narrate the steps. Thanks for these informational videos!
You are welcome. To see colourless, transparent gold in solution is astonishing. On a slightly different note, I watched a Commodity Culture upload on palladium the other day which included a clip from one of your uploads showing a well used silver cell anode basket filter with a reference to slimes created during the refining process. To me it seems as though proper credit was given and was used in good taste. Thank you Sir, for your knowledgeable, fascinating, engaging and entertaining content.
Very nice lighting since the new fume hood got installed! Saw the shorts about it, and was looking forward to the next refining video. Have you ever considered setting up a backlight when you do a precipitation? Maybe shining some extra light from the back gives the murky solutions some sparkling or glittering effect to it? Just an idea, idk how well it would work since precipetated gold doesn't really have a golden shimmering to it. Thank you very much!
Cheap strip lights from Amazon you can adjust the color temperature and the brightness and all different colors have a red and green Christmas special orange and purple Halloween red white and blue Fourth of July
Questions: @8:00 If you would have used a magnetic stirrer, perhaps there would have formed larger gold crystals in the suspension (instead of a higher amount of Au-nanoparticles). But this is only an assumption. @18:10 Why do you redisolve the fine gold precipitate again in HNO3 and HCL (and why add again H2SO4 as you had used FeSO4 just minutes ago, and the SO4-- would have precipitated lead)? @22:00 Instead of a SO2-bubbler you could perhaps use directly "Sulfurous Acid" (H2SO3), which is sold for around 65 USD per 2.5l. Thank you very much for your video! I always enjoy watching them till the end!
I’ve used stirring and the stir bar gets crusted with gold. I add H2SO4 every time I dissolve (unless I forget). It hurts nothing, provides a big benefit, and costs almost nothing. Learned from a professional refiner on the goldrefiningforum.com Harold_V
But I’m not extracting with a solvent. I’m rinsing a solid (gold sponge) free of ferrous sulfate. So I could use water as the solvent, put gold in the cellulose thimble filter, turn on the heat, and let it go indefinitely.
Very interesting. I have done crude refining of Gold with Aqua Regia and Copper. An uncle who worked at the mint in Ottawa gave me a tour of the place. The highlight of the tour was melting 999 Gold in a large crucible and pouring an ingot. They threw Carbon granules on top of the Gold while it was still glowing.. I often wondered why. They had Gold stacked like cordwood in the basement. He told me I could take any Gold I could get out of the building with, but I declined the offer.
And ive always loved the sound of the quench when there is a delay between the sound of it quenching and the exact moment it hits the water. You can here it hit the pan before even hearing it sizzle and quench to a finish. 👍👍
A thought crossed my mind. If you allow your gold to sit and dwell in hcl, and hit it with an ultrasonic cleaner, would you be able to use far less hcl to was the gold?
The fumes consist entirely of nitrous oxide; it is possibly that some gold-bearing solution may splash up during the boil, but you'll note that sreetips washes down the sides of the beaker before each transfer operation to recapture anything that may have splashed.
I use a clear glass saucer to cover the reaction. I do notice that a small amount of gold bearing solution tends to condense on the saucer. I do believe that a trace of gold may depart the beaker with the fumes during the dissolve. My opinion.
@@sreetips that isn’t gold solution that’s condensing on your watch glass. It’s ‘fuming nitric acid.’ N2O5 that has supersaturated a bit of water. It’s red from the NOx fumes, not from any gold.
@@B-System Nitrous oxide is colorless and mostly odorless. Those fumes are nitrogen oxides that include a small amount of N2O, but mostly nitrogen dioxide NO2, N2O4, N2O5. They’re just called NOx to include all those different N compounds.
Gg! We use fresnel lenses and solar panels to do our gold refinements. This helps save a lot of money on propane/torch costs however we do this a lot breaking down old electronics circuit boards etc. Keep up the good work!
Wow,you made gold dissappear i never thought i would see that. Science never fails to amaze me. Who came up with this and how many fails would they have to go through? Looks like i got some homework. Thanks i really enjoyed this video.
Beautifully done! Great video. You suggested I might do a channel on copper work, and after looking into it, I really appreciate the amount of work and care you have to put into every video. So now with a little better understanding, WOW, Thank you for all the work, and great content!
Man, it's so amazing to see such a clear, colorless solution knowing how much gold is suspended within it. I definitely watched that part about 4 times lol🤦
excellent video and the new fume hood with the added lighting is working out great. thank you for another informative and pleasing to watch video. stay Blessed
This was great! Educational as always. I learned that Ferrous Sulfate (Iron) looks just like gold in solution. That explains how I am being tricked into thinking there might be gold.
well BECAUSE OF YOU , i am fixing to do my first batch of gold , i have tore apart 12 desk tops and 11 lap tops , , i have bought everything i think i need to do all of this i know i need a few other chemical's , i know i need the stuff to test for gold in the solutions , if i calculated it right i am looking at about 3 ounces ,
SO2 is always awesome to watch! What had me wondering was why your first batch was so dark? It cleared up pretty well after it filtered but it was so dark I was wondering if it wasn't loaded with pgms? Dropping it with ferrous sulfate would have eliminated the pgms, and would explain the massive amount of rinsing! Great processing, gorgeous bar!
The karat gold I started with had much white gold so PGMs was a good possibility. Part of the reason I chose copperas. I didn’t mention this in the video but I should have for clarity.
You are extremely thorough. I'm actually surprised you don't distill the distilled water before you use it! Haha! Seriously, love the video's. It's satisfying how you make sure to rinse and re-rinse everything..
My thought on ferrous sulfate is that it would be extremely useful to use when you do your stockpot, paper storage, or slime filter refinings. It would let you drop just the gold out so you don't have to worry so much about the PGMs following the gold.
@@williamfoote2888 does the SO2 also precipitate other metals besides the gold? I do not know. The only down side I can see to the SO2 precipitation method is it makes the gold a little "sticky," but the benefit of not needing any additional rinses easily makes up for that.
@@beauhodges7957 It's a 'redox reaction'. The gold (+2) is reduced to the metal (0) and the sulfur (+4) in the SO2 is oxidized to 'sulfate' (+6). What you wind up with is gold metal and a dilute solution of hydrochloric and sulfuric acids. Very clean. Filter the deposited gold , rinse it with water a couple times drain it, and you're ready to melt it. In Sreetips work, he's very careful to keep other metals out. I do know that SO2 is used to reduce Cr6+ in (CrO4)-2 to Cr3+, as a means to treat waste chromates. I can't think of any other industrial uses besides 'bleaching' paper...
Some people think it is magic. I've had one or two who thought the crystals from the silver cell were just grown over and over without buying and running new silver through the process.
OMG ,,,,, that looks BEAUTIFUL , , and i am very interested in this new method , i also noticed u are NO LONGER caring if its a dry powder anymore , and the 3 torch system , very cool
My actual job is regarding precious metal extraction from E-waste using only environmentally friendly methods. My recommendation is to look towards aprotic conditions, the reduction potentials become much more favourable
One of the things you have to watch out for is that stannous chloride will turn black in the presence of gold *salts* but will do nothing in the presence of gold *particles*. If you have small enough gold particles (smaller than a micron), they'll stay in a colloidal solution and you'll just lose them. They won't show up on a stannous chloride test. If you have a known quantity of gold and you're not getting a stoichiometric yield, that might be why. It depends a lot on the conditions of the precipitation as to the size of particles you'll produce and how much they'll aggregate.
Honestly not gonna lie, that is how you should do it every time. That’s the coolest piece of chemical reaction eye candy ever. Tho I was a bit disappointed you forgot to test it before you dropped it on the gas drop, but the reaction made up for it.
The best description of the reaction... I was literally excited watching... My husband said "Your the only woman I Kno that tells at a chemical reaction video as if watching football!!¿" 🤣😂🤣 Guilty as charged!! ✌🏼😊💗🧪👩🔬
@@sreetips Still cool to watch. I showed my wife and son as well. Everytime I watch your videos I try to figure out what the actual chemical reactions are that are taking place. Its interesting to watch, and neat to see the process on how its done. I'd do it if I had the patience you have, but I don't...
...one of the best reactions ive ever seen!!!!!!! amazing!!!!!!! ...I wonder what would happen if you stopped the gas flow at the colorless point? noone would ever believe it was a clear water like fluid filled with gold!!!! 🤑🤑🤑🤑
I did just that in the next video I published. After removing the gas delivery tube, it did just as I predicted, it continued to turn brown from clear, even with no gas flow.
Magic! Pure magic. I had to watch this one again. I think this process with the gas is less caustic waist also. The flash over to gold and mud was impressive! Just WOW.
From being a regular watcher & enjoyer of your efforts. Seems like this video's process is how you should be dong all of the refinings for best purity. sukss that it takes so much to rinse color off from the copperass but, since it only drops the gold & less chemical waste from gas precip, that bar of gold looked AWESOME. I enjoy your efforts Sreetips & ty for taking us along
That's absolutely amazing to see the changes in the solution seems pretty efficient way for you to refine your gold not too many steps and not too many minutes spent 👍☺️
Beautiful gold bar :) In my opinion you would have a slightly higher yield, if during the rincing process you would add a tiny quantity of surfactant (basically a couple of drops of detergent) to your rince water and thus deminish the surface tension of the liquid, dropping more of the gold powder and flakes to the bottom of the flask. Just a suggestion of course, but worth a try... after all, after three or four rinces with pure water the soap will be washed away anyhow
Top notch 1st class Grade A interesting content and audio video presentation.💡🔊💰👍 My take away is: the gold refiner can implement a variety of techniques specific to the objective. However, I'm at a loss to understand the principal of achieving the demonstrated refinements. Especially so in regard to time, costs, efficiency, and my perceived valuation. On a final note, I'm left curious regarding the potential practices in regard to the waste material generated by the initial copperas reaction. My cat like curiosity places my experimental hand dumping several spoonfuls of SMB into the waste solution - straight away - (Gasp) foolishly! I just have this overwhelming impulse to extract everything valuable. I know I'll do the research in time but am confident that I'll see this waste again in a future cleanup. ✌️♥️👍
There was white gold in the mix. White gold is a known carrier of platinum group metals, especially palladium. Iron sulfate will precipitate only the gold leaving the traces of platinum group metals in solution. I’ll add the waste solution to my stock pot that full of copper. In the stock pot the PGMs will cement out on the copper and accumulate. Stock pot is the first step in the waste treatment process.
When he says "I'm going to add some hydrochloric acid here to turn it green" - that bottle is clearly marked Muriatic acid. Which is great for etching glass. Pretty powerful stuff, but not Hydrochloric. No matter, very much enjoyed this!
with the amount of gold you poured off you will need to do a temp waste pot clean up next. would have been a big boost to the total. gives you another video to do tho :)
Is there any safe surfactant that could be added to lower the surface tension of the solution to help those flakes drop? Safe meaning not rendering your waste solution useless.
@@sreetips Gold panners use jet dry as a surfactant to keep tiny flakes from floating away. Would definitely help with these larger flakes, assuming it wouldn't harm the solution. Just a thought.
With you're always being so meticulously careful not to have any ferrous metals in your equations I'm curious as to why you chose to use ferrous sulfate to precipitate the gold? Is that form different somehow or behave differently, or why is it that you would use it in this case but avoid it like the plague any other time?
It’s very selective, brings down only the gold. A second refining afterwards got rid of any residue iron. To provide some variety for my channel to peak interest.
I love how gas precipitation allows you to see the tiny scratches in glass that the precipitate uses as nucleation sites
It's really amazing to watch...
I was thinking the same thing
Say you had an absolutely pristine new beaker, would it nucleate somewhere because of the disturbance caused by the gas or would it crash all at once like supercooled water does?
@@gabrielribeiro3166 microscopically there is no such thing as pristine glass, the nucleation sites would just start smaller and look more frost like. Or sometimes you get a weird concentration/cooling issue where the nucleation sites won’t appear and you have to add a seed crystal or something else to get it to crash out. Like those hot ice videos or the ones where they supercool water and then as it pours out it freezes. Changes in temp, pressure, movement, and a surface for the newly formed crystals to nucleate to are the main factors.
how many of these steps coulda been eliminated, if any????????????????? thx dr tips love the channell
The gold precipitated by the gas had the same appearance as the one precipitated with oxalic acid in another video of yours.
Thank you for more this refining class.
The thumbnail is so accurate. For me, the first time seeing it was pretty amazing, and it still is pretty awesome to see.
I have to say of the many times I've watched you do refining on gold the two times you've used the gas have been my favorite and both of the bars turned out immaculate. I know it takes extra steps but wow at the end product.
It's not a practical consideration but a visual one... I'd like to see this done with the pregnant solution and the ambient environment it's sitting in just containing SO2... Get it clear with bubbling first so it's right on the fence, then just have it trapped in a chamber... I'm thinking the gold would only want to form at the surface, and fall out as it aggregates and gets heavy enough to go down. Real gold rain lol
*So2 Gas precipitation not only yields purer Gold powder, but it is also more efficient in its precipitation reaction, thus, dropping more Gold out of solution 👍. That pure Gold bar is worth about $3945.53 USD. Not bad Mike 👍😃*
Amazing!! Science is amazing always!!
Who's Mike?
@@dawnjennings4864 Mike Sree ? "Sreetips ?"
Yeh... if u can understand it all. I'm not a chemist nor do I have all that lab stuff.
Hey Sreetips, just wanted to let you know how much I love your videos. When I took chemistry in high school, my teacher was verbally abusive and I didn’t learn anything. Your videos have shown me that science and chemistry is actually beautiful and interesting! I’ve even decided to take an entry level chemistry class my next semester at college because of you and your videos! Thank you, and wish me luck!
I took one chemistry class in high school, got a “D”
But wish I would have studied more. I wasn’t a very good student.
Another channel with beautiful reactions is "chemical force" great content
@@sreetips
So where did your learn everything?
@@BillyT886 RUclips probably :D
this is my favorite way you drop the gold. obviously more of a hassle than SMB powder because of the set up, but it makes it look extra " science-y "
Science is truly cool 😎!! ✌🏼💗😊👩🔬🧪
He did it again !!! Another great video !!
Thanks Shannon!
Gooood afternoon from central Florida! Hope everyone has a great day!
Gooood afternoon!
Dig the new setup, i.e. fume hood, light, etc. The SMB gas reaction is incredible. Amazing how whatever changes are happening to Gold makes the solution go clear then brown. Also the melts are beautiful when you are not using filters. That was one beautiful bar this go around.
It's really hard for a layman like me to wrap my head around that. You have a colored solution, miraculously goes clear (yet still has that much gold in solute) then goes brown and all in a flash. I have a hard enough time accepting it just changing colors like that, but the clear thing explodes my head.
A few hundred years ago I would probably accuse him of witchcraft!
Faaaaaantastic video and results.
Thanks for sharing...
Your science never gets old Sreetips. I wonder if the first person to use SO2 thought "Where's my gold gone?" at the clear stage. 😅
I asked you maybe someone else as well, but thank you for doing this procedure for us and like you said it is a remarkable outcome and very beautiful results. I especially like the part where it turns brown quickly and out of nowhere the 4 9's fine collects in the bottom with no rinses needed. Your the best Mr. Street Tips.
your enthusiasm for the chemistry is fun to listen to!
Hello Mr sreetips. Spot on😊
Luckcy this time.
Thank you sir. Nice way to get some clip before bedtime. God bless🇺🇲
Arne 🇳🇴
Hello Arne!
Hello Mr sreetips. This clip was simply stunning 🌹
You lift many peoole over the world, whit your hobby. Thank you.
Man, I’m glad you enjoy refining because, I love watching you refine.
That's in fact facinating.
Thanks a lot for the time spent to teach us.
With respects.
Sylvain
Ferrous Sulfate on your first precipitation seems like the best way to recover your PGMs and isolate your gold. Kudos, sir. 👍
The flash over to brown colour solution looks like special effects. Amazing.
I dont know anything about any of the things you are doing but it is super interesting to follow along and listen to you narrate the steps. Thanks for these informational videos!
You are welcome. To see colourless, transparent gold in solution is astonishing. On a slightly different note, I watched a Commodity Culture upload on palladium the other day which included a clip from one of your uploads showing a well used silver cell anode basket filter with a reference to slimes created during the refining process. To me it seems as though proper credit was given and was used in good taste. Thank you Sir, for your knowledgeable, fascinating, engaging and entertaining content.
These reactions never cease to amaze me really fascinating
First 👍's up sreetips thank you for sharing
Very nice lighting since the new fume hood got installed! Saw the shorts about it, and was looking forward to the next refining video. Have you ever considered setting up a backlight when you do a precipitation? Maybe shining some extra light from the back gives the murky solutions some sparkling or glittering effect to it? Just an idea, idk how well it would work since precipetated gold doesn't really have a golden shimmering to it. Thank you very much!
I’ve tried with a small LED and had some good results. I’ll try it again in n my next video.
Cheap strip lights from Amazon you can adjust the color temperature and the brightness and all different colors have a red and green Christmas special orange and purple Halloween red white and blue Fourth of July
Sooo coool sir😊
I never knew chemistry is so interesting!
Very nice! Loved the food descriptive words in this one, another great video.
have a golden day
The transition of colour while the gas was flowing was fascinating. And another tasty looking loaf of gold to show for it. Noice 👌
Questions:
@8:00 If you would have used a magnetic stirrer, perhaps there would have formed larger gold crystals in the suspension (instead of a higher amount of Au-nanoparticles). But this is only an assumption.
@18:10 Why do you redisolve the fine gold precipitate again in HNO3 and HCL (and why add again H2SO4 as you had used FeSO4 just minutes ago, and the SO4-- would have precipitated lead)?
@22:00 Instead of a SO2-bubbler you could perhaps use directly "Sulfurous Acid" (H2SO3), which is sold for around 65 USD per 2.5l.
Thank you very much for your video! I always enjoy watching them till the end!
I’ve used stirring and the stir bar gets crusted with gold. I add H2SO4 every time I dissolve (unless I forget). It hurts nothing, provides a big benefit, and costs almost nothing. Learned from a professional refiner on the goldrefiningforum.com Harold_V
What I’d like is a cylinder of clean SO2 gas. Hook up a delivery tube, open the valve, and BANG! Pure gold with no fuss.
@@sreetips Instead of a SO2-bubbler you could perhaps use directly "Sulfurous Acid" (H2SO3), which is sold for around 65 USD per 2.5l.
A soxhlet extractor works really well for rinsing precipitate & limits waste byproducts.
But I’m not extracting with a solvent. I’m rinsing a solid (gold sponge) free of ferrous sulfate. So I could use water as the solvent, put gold in the cellulose thimble filter, turn on the heat, and let it go indefinitely.
The SO2 Gas precipitation was a treat to see . Thank you !
Fantastic!!
Thnx 4 showing us these alternative methods.
Brilliant presentation.
Cheers!!
Cool name mate✌🏼💗😊👩🏼🔬
@@donnakawana Cheers! It's an ode 2 Jimi Hendrix & Prince. :)
@@Psychedelicide I can dig it... That's really cool✌🏼💗😊
This is likely to be the best 37 minutes of the remainder of my day
I must completely agree with you!!
That new light in then hood and the new SO2 precipitation works like a champ..! Delicious..!
These reactions are fascinating and that gas precipitation was like magic. Brilliant and such a beautiful bar of gold. 👍
Love your content! Worked as an office administrator in a lab and this makes me miss my chemists!
Very interesting. I have done crude refining of Gold with Aqua Regia and Copper. An uncle who worked at the mint in Ottawa gave me a tour of the place. The highlight of the tour was melting 999 Gold in a large crucible and pouring an ingot. They threw Carbon granules on top of the Gold while it was still glowing.. I often wondered why. They had Gold stacked like cordwood in the basement. He told me I could take any Gold I could get out of the building with, but I declined the offer.
And ive always loved the sound of the quench when there is a delay between the sound of it quenching and the exact moment it hits the water. You can here it hit the pan before even hearing it sizzle and quench to a finish. 👍👍
I love your videos.
A thought crossed my mind. If you allow your gold to sit and dwell in hcl, and hit it with an ultrasonic cleaner, would you be able to use far less hcl to was the gold?
I don’t know about that. The problem is that the HCl would tend to dissolve the stainless steel ultrasonic
Your new light may have brightened up the fume hood, but that bar brightened up the video. Very impressive !!!!!
do the fumes produced by the aqua rega contain any dissolved gold?
The fumes consist entirely of nitrous oxide; it is possibly that some gold-bearing solution may splash up during the boil, but you'll note that sreetips washes down the sides of the beaker before each transfer operation to recapture anything that may have splashed.
None.
I use a clear glass saucer to cover the reaction. I do notice that a small amount of gold bearing solution tends to condense on the saucer. I do believe that a trace of gold may depart the beaker with the fumes during the dissolve. My opinion.
@@sreetips that isn’t gold solution that’s condensing on your watch glass. It’s ‘fuming nitric acid.’ N2O5 that has supersaturated a bit of water. It’s red from the NOx fumes, not from any gold.
@@B-System Nitrous oxide is colorless and mostly odorless. Those fumes are nitrogen oxides that include a small amount of N2O, but mostly nitrogen dioxide NO2, N2O4, N2O5.
They’re just called NOx to include all those different N compounds.
This was freakin awesome ……thanks so much for sharing
Gg! We use fresnel lenses and solar panels to do our gold refinements. This helps save a lot of money on propane/torch costs however we do this a lot breaking down old electronics circuit boards etc. Keep up the good work!
I never would have guessed you could 'hide' 2+ ounces of gold in 3 liters of clear liquid. That was a cool magic trick.
Awesome reaction! No one could say that there was 70 g of gold in that solution when it got colorless with the SO2 gas. 👏👏
Wow,you made gold dissappear i never thought i would see that. Science never fails to amaze me. Who came up with this and how many fails would they have to go through? Looks like i got some homework. Thanks i really enjoyed this video.
The lattice of gold forming on the walls of the beaker remind me of the first couple days of a new silver cell cycle!
Beautifully done! Great video. You suggested I might do a channel on copper work, and after looking into it, I really appreciate the amount of work and care you have to put into every video. So now with a little better understanding, WOW, Thank you for all the work, and great content!
Man, it's so amazing to see such a clear, colorless solution knowing how much gold is suspended within it. I definitely watched that part about 4 times lol🤦
Very nice. That was a cool reaction. Clear liquid then boom.
You my friend are very good at this stuff. I have learned so much today thanks for the amazing content. And for the explanation to the process
Fantastic video. Love the SO2 precipitation. Feels like real-life magic every time.
excellent video and the new fume hood with the added lighting is working out great. thank you for another informative and pleasing to watch video. stay Blessed
That colour change made me smile...That's one of the reasons I love chemistry
That was a great idea...again...thank you so much for sharing this kind of information
This was great! Educational as always. I learned that Ferrous Sulfate (Iron) looks just like gold in solution. That explains how I am being tricked into thinking there might be gold.
Test with stannous to find the truth.
Talkien used to say that there is no difference between magic and an advanced enough technology. This is a good example 👏
Using the glass rod to help pour the iron sulfate into the funnel accurately and without splashes was smart, I had never seen anyone do this!
I liked the pouring down the glass rod... Fancy! ;) lol
well BECAUSE OF YOU , i am fixing to do my first batch of gold , i have tore apart 12 desk tops and 11 lap tops , , i have bought everything i think i need to do all of this i know i need a few other chemical's , i know i need the stuff to test for gold in the solutions , if i calculated it right i am looking at about 3 ounces ,
Good luck with your recovery experiments.
Very nice gold bar thanks for sharing sreetips
I think the SO2 gas precipitation method is so spectacular to watch .👍👍👏👏
It’s my favorite
SO2 is always awesome to watch! What had me wondering was why your first batch was so dark? It cleared up pretty well after it filtered but it was so dark I was wondering if it wasn't loaded with pgms? Dropping it with ferrous sulfate would have eliminated the pgms, and would explain the massive amount of rinsing! Great processing, gorgeous bar!
The karat gold I started with had much white gold so PGMs was a good possibility. Part of the reason I chose copperas. I didn’t mention this in the video but I should have for clarity.
@@sreetips great result in any case!
You are extremely thorough. I'm actually surprised you don't distill the distilled water before you use it! Haha! Seriously, love the video's. It's satisfying how you make sure to rinse and re-rinse everything..
Awesome video. I have seen this process before but dont remember where or when. Thanks for sharing.
33:45 My favourite part! 🤩👉🔥🧱🔥
totally love watching that process, thank you sir!
My thought on ferrous sulfate is that it would be extremely useful to use when you do your stockpot, paper storage, or slime filter refinings. It would let you drop just the gold out so you don't have to worry so much about the PGMs following the gold.
Adding in iron makes for a more voluminous waste stream.
SMB adds more Na to the stream.
SO2 adds, really, nothing to the waste stream.
@@williamfoote2888 does the SO2 also precipitate other metals besides the gold? I do not know. The only down side I can see to the SO2 precipitation method is it makes the gold a little "sticky," but the benefit of not needing any additional rinses easily makes up for that.
@@beauhodges7957 It's a 'redox reaction'. The gold (+2) is reduced to the metal (0) and the sulfur (+4) in the SO2 is oxidized to 'sulfate' (+6).
What you wind up with is gold metal and a dilute solution of hydrochloric and sulfuric acids. Very clean. Filter the deposited gold , rinse it with water a couple times drain it, and you're ready to melt it.
In Sreetips work, he's very careful to keep other metals out.
I do know that SO2 is used to reduce Cr6+ in (CrO4)-2 to Cr3+, as a means to treat waste chromates.
I can't think of any other industrial uses besides 'bleaching' paper...
@@williamfoote2888 thanks for the information. I love how we learn from Sreetips and from each other.
Thank you for sharing this process. It’s pretty much like I remember it from almost 50 years ago.
Some people think it is magic. I've had one or two who thought the crystals from the silver cell were just grown over and over without buying and running new silver through the process.
Some people don't use their brain for anything more than to hold a hat!
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@@donnakawana And hats have gone out of fashion.
I’ve had folks ask if I’m creating silver from nothing in my silver cell.
OMG ,,,,, that looks BEAUTIFUL , , and i am very interested in this new method , i also noticed u are NO LONGER caring if its a dry powder anymore , and the 3 torch system , very cool
Totally cool...I just showed my co-worker he was blown away...
My actual job is regarding precious metal extraction from E-waste using only environmentally friendly methods. My recommendation is to look towards aprotic conditions, the reduction potentials become much more favourable
I like the more creative video thumbnails and titles. You've come a long way in the last few years Sreetips.
One of the things you have to watch out for is that stannous chloride will turn black in the presence of gold *salts* but will do nothing in the presence of gold *particles*. If you have small enough gold particles (smaller than a micron), they'll stay in a colloidal solution and you'll just lose them. They won't show up on a stannous chloride test. If you have a known quantity of gold and you're not getting a stoichiometric yield, that might be why. It depends a lot on the conditions of the precipitation as to the size of particles you'll produce and how much they'll aggregate.
Excellent video great content thank you for sharing this six stars brother
Honestly not gonna lie, that is how you should do it every time. That’s the coolest piece of chemical reaction eye candy ever.
Tho I was a bit disappointed you forgot to test it before you dropped it on the gas drop, but the reaction made up for it.
The best description of the reaction... I was literally excited watching... My husband said "Your the only woman I Kno that tells at a chemical reaction video as if watching football!!¿" 🤣😂🤣 Guilty as charged!! ✌🏼😊💗🧪👩🔬
I always seem to forget the stannous test at a critical time. Realized it during editing.
@@sreetips Still cool to watch. I showed my wife and son as well. Everytime I watch your videos I try to figure out what the actual chemical reactions are that are taking place. Its interesting to watch, and neat to see the process on how its done. I'd do it if I had the patience you have, but I don't...
...one of the best reactions ive ever seen!!!!!!! amazing!!!!!!!
...I wonder what would happen if you stopped the gas flow at the colorless point? noone would ever believe it was a clear water like fluid filled with gold!!!! 🤑🤑🤑🤑
I did just that in the next video I published. After removing the gas delivery tube, it did just as I predicted, it continued to turn brown from clear, even with no gas flow.
Magic! Pure magic. I had to watch this one again. I think this process with the gas is less caustic waist also. The flash over to gold and mud was impressive! Just WOW.
From being a regular watcher & enjoyer of your efforts. Seems like this video's process is how you should be dong all of the refinings for best purity. sukss that it takes so much to rinse color off from the copperass but, since it only drops the gold & less chemical waste from gas precip, that bar of gold looked AWESOME. I enjoy your efforts Sreetips & ty for taking us along
From this day on, if I want high purity, I’m using this sequence.
Dude that was totally amazing and awesome thank you for your time
@28:43 it's neat that a portion of one of the heaviest elements (Gold) floats on top of the solution!
That's absolutely amazing to see the changes in the solution seems pretty efficient way for you to refine your gold not too many steps and not too many minutes spent 👍☺️
Beautiful gold bar :) In my opinion you would have a slightly higher yield, if during the rincing process you would add a tiny quantity of surfactant (basically a couple of drops of detergent) to your rince water and thus deminish the surface tension of the liquid, dropping more of the gold powder and flakes to the bottom of the flask. Just a suggestion of course, but worth a try... after all, after three or four rinces with pure water the soap will be washed away anyhow
Top notch 1st class Grade A interesting content and audio video presentation.💡🔊💰👍
My take away is: the gold refiner can implement a variety of techniques specific to the objective. However, I'm at a loss to understand the principal of achieving the demonstrated refinements. Especially so in regard to time, costs, efficiency, and my perceived valuation.
On a final note, I'm left curious regarding the potential practices in regard to the waste material generated by the initial copperas reaction. My cat like curiosity places my experimental hand dumping several spoonfuls of SMB into the waste solution - straight away - (Gasp) foolishly! I just have this overwhelming impulse to extract everything valuable.
I know I'll do the research in time but am confident that I'll see this waste again in a future cleanup.
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There was white gold in the mix. White gold is a known carrier of platinum group metals, especially palladium. Iron sulfate will precipitate only the gold leaving the traces of platinum group metals in solution. I’ll add the waste solution to my stock pot that full of copper. In the stock pot the PGMs will cement out on the copper and accumulate. Stock pot is the first step in the waste treatment process.
@@sreetips I understand. Thank you for sharing this interesting content. It was emotional observing the float gold; it really floated.
I find your video’s very interesting and relaxing. Beautiful work. Thank you
1900s==>book==>Hoke
2000s==>video==>Sreetips
You're reference book of future refiners' man. Respect.
When he says "I'm going to add some hydrochloric acid here to turn it green" - that bottle is clearly marked Muriatic acid. Which is great for etching glass. Pretty powerful stuff, but not Hydrochloric. No matter, very much enjoyed this!
Pause the video and look carefully right below “MURIATIC ACID” you will see “hydrochloric acid 31.45%” muriatic acid is hydrochloric acid.
@@sreetips Wow, thank you. I never knew that, and was taught in etching class it was something different! Now I know!
ohh men what a beautiful precipitations, very nice gold bar..
with the amount of gold you poured off you will need to do a temp waste pot clean up next. would have been a big boost to the total. gives you another video to do tho :)
Much more clingy behaviour from the gold sponge after an SO2 precipitation. Sure liked the sides of that big beaker.
this sends my brain in some weird directions
if this couldn't convince a king that you were a magician, nothing would
The gold glow shining on your fingers after the melt... like how I imagine it would look in a treasure chest
Love gas precipitation. It's glorious.
Another great refining and pour Kev. I don't think there's another YTer who could get away with calling a gold bar, 'scrumptious'. 🤣🤣👍👍
Is there any safe surfactant that could be added to lower the surface tension of the solution to help those flakes drop? Safe meaning not rendering your waste solution useless.
I would have filtered them out together with the precipitated gold, was pure without additional chemicals anyway.
A drop of dish soap. Not sure about that. If they float then their mass must be minimal. But in refining, every little bit counts.
@@sreetips Gold panners use jet dry as a surfactant to keep tiny flakes from floating away. Would definitely help with these larger flakes, assuming it wouldn't harm the solution. Just a thought.
Amazing 😍😍😍
With you're always being so meticulously careful not to have any ferrous metals in your equations I'm curious as to why you chose to use ferrous sulfate to precipitate the gold?
Is that form different somehow or behave differently, or why is it that you would use it in this case but avoid it like the plague any other time?
It’s very selective, brings down only the gold. A second refining afterwards got rid of any residue iron. To provide some variety for my channel to peak interest.