WHEN TO STOP ADDING SODIUM META BISULFITE IN OUR AQUA REGIA SOLUTION? | GOLD PRECIPITATION REACTION
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- เผยแพร่เมื่อ 13 ม.ค. 2025
- This is the best part of gold recovery process, but how to till that I precipitate the gold in my aqua regia solution? so watch this video..
That's awesome I'm glad you said somthing alot of ppl wouldn't understand why the drop was different
Because of two different reason,
1 pH of solutions
2 the amount of gold in solution
Great job with detailed explanation. This will help many new learners.
Thank you very much brother..
Nitric should first be completely consumed before moving on to precipitation. If too much nitric has been added in the initial dissolution, then the aqua regia solution should be boiled down to a syrup in order to drive off the excess nitric acid. Then re diluted with HCL and H20 for filtering and THEN precipitation.
I also learn a lot of knowledge from you and also from my other viewers, highly appreciated..
best practice using aqua regia is done by slowly add nitric not mixing directly 3:1 ratio or 4:1 ratio, and I also realized that when make gold recovery in small amount of scrap during precipitation you have already got precipitation but you never notice it, unlike large amount of gold, in addition watch sreetips video he never neutralized aqua regia because he use nitric correctly drop by drop
Why does the gold sediment float in the water one by one when the water is stirred? Please tell me what todo❤❤❤
Thanks for watching and reaching me, the mean cause is our precipitant, the precipitation of smb are very tiny particle and easily float, all you need to do is to wait a couple hours to sank the gold into the buttom of your beaker then decant the eccess solution carefully then by washing you need always hot distilled water and always wait all the gold set back again to the buttom of your beaker the the final depends on you if you dry or capture through filter paper.
Good Sir Very nice knowledgeable style of teaching.👍✨👍
Thànk you buddy boy❤
I just boil it down then filter. Make nitrated cofee filters as they are resistant to it and easily burn to recover the materials soaked in them. Then i keep cooking till it starts crystalizing let cool saving the gold as HAuCl4. This then gets fed into an electrolytic cell eventually that makes 3 or 4N gold plus chlorine that gets used to recover other noble metals. Also jewlers like the chloroauric acid to feed their electroplating machines and they pay more than the gold value for it. ❤
Good to know brother, thanks
Why didn't you add in the Ure into AuCl3 before adding the SMB?
Cause I know that no more excess nitric acid in my aqua regia solution brother..
Hello, the nitric acid and hydrochloric acid required for aqua regia have a certain purity level. For example, the purity of HNO3 sold in the market may be 52%, and HCl may be 25%. Can aqua regia be prepared from two acids at these purity levels?
yes, that is also possible, 52% hno3, and 25% hcl, 3:1 ratio, if you can't find higher concentrations. but good concentrations of aqua regia 68% hno3 and 29% to 35% hcl.
@@PoorMiners321thanks
@@PoorMiners321thanks
Thankz for the tips bro..
Always welcome
Low acidity, put it on the hot plate and boil after SMB. Works fine
Yeah you can do also, forcing precipitation but sometimes that precipitation are soluble in boiling hcl, unlike the natural precipitation by sulfurazations
Should you neutralize first the acid before putting sodium metabisulfite?
minsan hindi ko na nag neuralize kasi hindi ako nag mix ng 3:1 ratio sa aqua regia kaya dipindi nalang po sa inyo kung kinakailangan e neutralize e pwedi rin pero dapat natutu kayo kung bakit hindi na kinakailangang e neutralize ang solution
Instead of urea If we use sodium hydroxide solution to kill its nitric acid, will that work?
Isn't work brother, you neutralize also hydrochloric acid which is very important in aqua regia, and also you can precipitate all metals in your solution.
Thank you for these useful videos. I am asking if there is a yellow gold deposit
Sometimes nothing but you need to confirm first by stannous test..
@@PoorMiners321 I am sure after filtration by the stannous test that the solution contains gold, but I suspected that this black spot is due to some minerals
hello Mr, I would like to know a method with which I can extract gold from a refractory ore
Very simple brother, crush refractory ore into tiny pieces with 600 mesh strainer then go a head for panning to separate heavy gold metal from lightweight minerals then collect gold, very long process but i recommend you to see some of my video
I am just starting e scrap gold recovery but at the end something wrong every time.may be because of lack of knowledge....
Please mention how to recognise by it's colour wether which camical need urea, sulfamic acid,smb,or HCL.kindly reply 😊
Thank you very much brother, some tips here, For those new to gold recovery, the first thing to do is always dissolved base metal, do not disslove directly into aqua regia, collect gold foils by filtering, dissolved gold foils in aqua regia, note! aqua regia is difficult to master, to make aqua regia you need to cover your gold foils with hcl, and slowly add nitric acid, if you see that everything is dissolved, stop adding hno3 the gold is already in the solution , neutralize aqua regia by adding sulfamic if necessary, by adding small amount.
For SMB you need to check the purity of the smb you will use, its sulfur must be at 67%, if it is below 67% sulfur, it will be difficult for you to precipitate the gold so there will be no result from what you did.
@@PoorMiners321 Thank you very much your guidance very much needed ۔Yes I started with HCl then added nitric to it but gold didn't resolve۔۔۔then I added sulfuric acid drop by drop after 24 hours, filter the solution but still gold foil remains ۔I kept filter paper aside and started the next step to remaining aqua regia neutralize with sulfamic acid then used smb for participation but gold didn't drop and colour of solution is dark green colour ۔ please help ۔thank you
@saminakader571 ah you didn't dissolve your gold foils brother, then you add sulfuric drop by drop? That's wrong, add few amounts only maybe 2 to 3ml, if hcl and nitric acid isn't dissolve your gold foil check the concentration of your hcl 29% and up is working well, even if your nitric acid 50% to 68% its working better.
@@PoorMiners321 thank you for your kindness ۔
I dissolve metabisulfite in cold water and the temperature of the acid is about 50 degrees, although I also tested at low temperatures of about 20 degrees, but no color change occurs. I try to extract gold from the soil but I did not succeed. I first wash and heat the soil with nitric and sulfuric acid and then add the acid, but again I can't do sedimentation.
In your case,
have you test your solution have gold in it? if you are very sure that theres gold, then this is your problem,
higher acidity, you disslove your gold bact to solution again, you have excess nitric acid, then contamination by late adding urea, then sulfuric also cause that your gold goes to the solution for ever..
here is the last choice to recover your gold.
don't just throw away that solution, boil it at leat 10 minutes boiling as in boiling, then slowly drop sodium sulfite, not sodium metabisulfite, sodium sulfite and sodium metabisulfite is different, continue boiling until you got precipitation forming as a black powder in a beaker then refine it.
The temperature isn't affect the process, the main cause here is higher acidity, excess oxidizer,
good evening sir wla po b kau platinum or palladium process
So far wala po boss kasi wala pa po tayong oxy acetylene, mataas ang melting points ng platinum groups of metal hindi kaya ng map gas lang.
Plz help me I lost my gold Sir when i add sodium metabisulfite into the solution I got white colour crystals at the bottom of beaker. What is this stuff?
@talkoftoday191 same problem here what did you do to solve the issue
Ok first thing you gonna do here is to filter white precipitate, separate the liquid then add zinc powder to your filtered solution, if zinc powder unavailble to you add zinc bar, then the white precipitate that you capture in your filter paper try to redissolve into aqua regia mabe 100ml hcl and 20ml 68% hno3 , then precipitate again using iron sulfate..
Posible cause of white precipitations.
1. Maybe your solutions is low acidity.
2. Maybe the gold are small amount and large amount of base metal and your process are directly dissolve into aqua regia.
3. Maybe your using more water to wash during filtrations.
4. Maybe your smb are low sulfur content. Recommended smb sulfur content 60% and above.
5. Maybe you add too much neutralizing agent like urea or sulfamic.
Hello, when I add metabisulfite to acid, the solution turns black, but very soon after a second, it returns to the color of acid and the blackness is not stable. I add a little urea to the solution, but it does not change color anymore. What is the cause of this defect? After adding urea, I also added hydrochloric acid, but it still does not change color, please guide me
Nice work😁, Good day sir I Am not expert sir but, I had accumulated knowledge to do this task, I realy relate your problem we back 9 years ago.
so this is how to do next, do this job in order..1, extract the gold from with water and nitric acid alone,
2, wash the material with distelled water multiple times not tap water
3, add hydrochloric acid double times with your materials.
4 , heat hydrochloric acid at 85c is better to react faster if nitric acid is apply, start dropping nitric acid to form aqua regia start at 3ml if the reaction has very slow then add more,when reaction goes stronger wait until reaction has stop, then drop 1 shot of sulfuric acid small amount 2ml to 3ml, then add more nitric, if you see that there's no reaction when you add nitric then its time to stop adding nitric and cool your aqua regia solution
5. if solution has cool down then filter it multiple times,
6, add small amount of urea halt table spoon to 1 table spoon or diesel exhaust fluid,
7, add smb, depends on amount of your aqua regia, some people dissolve it in water but for me i dont like that because you cant estemate if you got precipitation or not, that process is good for expert not for the beginners.
Nitric still alive & you but urea you killed Nitric & HCL so you should add some HCL much better with rocks Settlement done by ley soda first time
Excellent video
God Bless You
Thank you❤
nice very helpfull video thank you
Thanks,❤
Hello. Is it possible to set up Polish translation of your videos? I kindly ask for it.
Ok brother, I add polish translation today.
Thank you for the useful info.
your always welcome and Thank you very much❤
Hey bro listen after I added SMB it precipitated gold, but the solution still has gold in it. How do I get the rest out?
Do you neutralize nitric? If not then its imposible to get gold out from solution, contenue add smb until foaming comes on the top of solution, then add distilled water to dilute solution.
Yeah I did with sulfamic acid. But after I add smb first I get gold not all of it though. My stanneous is still positive. So do I know add hcl and heat it to add sulfamic then smb again. Right ...
@andrebattis9410 don't add sulfamic again it contaminate your solution, filter it to get the precipitated gold, then the filter solution add hcl and heat then add smb
@andrebattis9410 if you dont get precipitation, calculate the estimated gold you have in solution, sometimes the stannous test turn purple because of too much adding smb, if you think that there's missing gold last option is to add zinc powder to cement out the remaining gold in your solutions.
Try ferrous sulphate
Im dumb af im frustated right now XD
Thank you for your video
never did i thought of many variables that could go wrong
Somehow i panicking because twice i failed to get the gold out of solution
When i added SMB i also add Zinc Powder, would that upset the reaction?
if that would messing all the stuff how could i solve it back ?
Thank you for your video brother it helps me learn from the mistake
Yes you can, the reason not getting precipitaion first improper ways of using aqua regia, second, your smb is low sulfur, I try many times and I failure because I found out that the smb I use is low sulfur contain thats why we don't get gold precipitations, thanks brother.
Sir when i add sodium metabisulfite into the solution I got white colour crystals at the bottom of beaker. What is this ??
your solution maybe low acidity or contamenated with other base metal,
so you do this, contenue add smb until there are foams,
then if the solution got foaming, stop adding smb, then allowed to settle down all precipitation, maybe 10 to 12 hours, then after settle down filter it with filter paper, to capture all precipitation including white precipitate, then dry it to your beaker or steel plate, then dissolve again with hot aqua regia,
to dissolve in aqua regia add hydrochloric acid much to covered the material, then heat is apply, when hydrochloric acid are heated, slowly drop nitric to form aqua regia, start it with 3ml nitric acid, if you see that all you precipitation dissolve then stop adding nitric acid.
Thank you for your quick response may god bless you.
Once the foam stops is when you stop
foaming that quickly dissappearing is the good indecation that you got perfect precipitation and that is the right time to stop adding smb, but if your aqua regia solution first add smb it immediately foams and taking longer to dissappear that means you have excess oxidizer or excess nitric acid all you need to do is to add small amount of water and add add urea or exhaus fluids to kill nitric.
I have been adding too little SMB? I read molarity is 1:1 SMB:Au
What is white precipitate after SMB from AR?
is not enough brother..
low acidity and contaminated with other metals.. but still gold in it, you need to filter all precipitation wash it with distilled water and dissolve again to fresh hòt aqua regia..
dear sir how to separate platinum and gold
all you need to do is to disolution the platinum, alloyed with gold which dissolve in nitric acid so that in gold parting, for example, if platinum was present, some, or perhaps the whole of it would go into solution, then go ahead for aqua regia and precopitate with sodium meta bisulfite so that gold precipitate then platinum remain in solution as I know.
Nice video share
❤Thank you brother..
Obrigado Mestre.
Your welcome brother
SMB foodgrade??? Please
Yes sir,
Selam kardeşim Smb sicak su ile karıştırıp öyle atsan daha güzel olmaZmi böyle çok Smb harcarsin birde eski cokertileri de kulana bilirsin sade altın olduğuna inandigin eski atıkları tabi 😊
Thanks
ALLAAHU AKBAR.
SALAM DARI MUSLIM JAKARTA INDONESIA.
Thanks brother.
Actually when it turns brown
if your aqua regia has almost no base metal and if you think there is a lot of gold, its okay to turn brown, but if your aqua regia have more base metal, and when you add smb it turn brown is not good indecation, if you got precipotation you need to refine it,
Very good ❤
Thank you
Nice video
Thank you..
تحياتي لك صديقي قناتك رائعه ممكن طريقه تحضير بودره زنك
شكرا لك أخي، إنهم يبيعون مسحوق الزنك، لكن إذا لم يكن متوفرا في بلدك، يمكنك أيضا تثبيت معدن الزنك لمسحوق الزنك
هل ممكن شرح طريقه كيمائيه التحضير بودر زنك
Thanks for you
Thanks❤
Brother after adding SMB in my solution there is no reaction? What could be the reason
Low aciidity bro or maybe your smb expired..
@@PoorMiners321 SMB powder date 2023 to 2026, aqua regia was 60 ml. 3 part HCl 1 part nitric. It's My previous experiment. I am already working with a new one, I added urea then cold water then I mixed SMB with distilled water, after adding urea there was a reaction but after adding SMB there wasn't a reaction. Please help
Try to add another hcl, after adding hcl add directly smb dont dissolve in water
@@PoorMiners321 okay bro, I gonna to do it
Love you❤❤❤ so much
Thank you❤
Harika emeğinize sağlık
Thanks
0:17
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Thank you bro❤
White fooms & Bubbles is Sign to stop
Yes..
@Poor miners am not asking I am tilling you 😂🙏 otherwise you can get 100% pure gold without participating
Thanks..
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Hopeless. Nothing but mumbling and no clear advice or instructions !
I'm a gold dealer, I do this myself and was hoping for something new. Instead what I saw was a bumbling, mumbling bunch of procedures with no coherence and very unclear. Consider using subtitles if your English is poor and make everything clear. I'm experienced and just wasted my time but with a bit of effort you could make a really helpful video.
I apologize you brother this video is not totaly good that your looking for, this is a precipitations compilations of my gold recover video, so soon we make a complete refining process including the acid pH level, to precipitate gold, smb grades, types of filter papers and temperature.
He said too much water added during filtering so there’s not enough sulfur dioxide being produced from reaction with HCl. Adding more HCL will increase sulfur dioxide yield, and allow the gold to be displaced.
He put text on screen. Seems pretty clear to me.
Hay bhai apna number de do
Boss ano name mo sa fb usap tayo pa guide ako sana ma pansin
Oh, pontahan mo poor miners parin..