Gold chloride to metallic gold
- Thread starter Shakir
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Most gold chlorides we deal with are in solution and not in solids so if it’s in solution it’s very easy to precipitate the gold out of the solution the details of which are clearly explained here on the forum.
Thanks for your reply and guidance,, I used to work on sedimentary soils, sometimes I face difficulties separating silver from gold,, such ores can be very rich more than what one can imagine,, its simple to precipitate silver alone, but not gold ; silver tends to protect gold in different ways, so I use copper to precipitate silver and gold from aqua regia together with continuous heating,, the precipitate doesnt melt and turns black just like slag !! That’s why I thought of this idea, silver will convert into metallic, but not sure of what exactly happens to gold precipitate ,,.. That ore contains silver, gold and iron carbonates, they react vigorously with any single acid (even vinegar!!) .. and I can find no way but to dissolve everything. Anyway, exploring and finding new ways and methods is another story; all the fun is there!!
Maybe its time to discuss every aspect, thank you
The Gold Silver separation is easy.
There will be "no" Silver in Aqua Regia.
Just traces.
But seriously, you are not leaching soil with acids are you!
Soil/Ore need different treatment than jewelry/e-waste.
Read the links I gave you and search the forum.
Soil treatment is different from electronic parts, minerals come in different complexes in nature, minerals carbonates (for example) dissolve easily in any single acid, you may not believe gold and silver dissolve in hcl alone, but they do!! Now, minerals of that kind does not behave like metallic ones; silver does not precipitate out just by adding hcl to nitric solution that contains silver, leaching such ore dissolve everything no matter what acid is used !! You cant see silver or gold particles in such ore,, its something like the precipitate that comes out of aqua regia, but already made naturally !! To make it clearer; when different metals are in solution, and precipitated out using sodium carbonate, the result would be different minerals carbonates mixed together, and there is no way to leach it, right? Gold chloride, gold nitrate, gold carbonate, gold carbides, gold sulfide .. all are out there, mixed with other minerals .. So, most of techniques and methods mentioned in this forum will not simply work ,, .I am just looking for finding a method that convert gold chloride along with silver chloride into metallic forms before melting,, if there is a way, or anyone has an idea ,, I would be grateful ,,,
Martijn
Well-known member
Well, there is a difference between recovering and refining. Both can be done in several ways.
For ore you could consider smelting.
Acids on ore is a bit like russian roulette...
edited : for the AgCl there is the sulfuric on iron way. but both simultaniously, will be hard due to the silver reaction to chloride.
As Yggdrasil said there will not be any AgCl worth recovering in gold Chloride.
For ore you could consider smelting.
Acids on ore is a bit like russian roulette...
https://goldrefiningforum.com/threads/when-in-doubt-cement-it-out.30236/
edited : for the AgCl there is the sulfuric on iron way. but both simultaniously, will be hard due to the silver reaction to chloride.
As Yggdrasil said there will not be any AgCl worth recovering in gold Chloride.
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You are plain wrong mate.
And it was not that you can't leach precious metals with acids.
Because you can, but here is the problem, unless you have made a proper assay you will not know if there are Mercury, Arsenic, Cadmium or a number of other toxic elements in it.
But seriously go and Study the links I gave you, we have had thousands of users coming with similar claims to this forum.
No one has bee able to prove their claims.
If Silver is in solution it WILL create Silver Chloride if it come in contact with another dissolved Chloride,
no exception as to my knowledge.
This is why the separation of Silver from other Nitrates or Sulfates are considered a safe bet.
If you some how do not manage to get Silver Chloride from a solution like this,
it because there are no Silver in solution.
Simple.
Martijn
Well-known member
Go ahead. where do you want to start?
I already tried smelting, it doesnt work !! Silver carbonates evaporate at low temperatures, around 300 C
He said cement it, not smelt it.
You really need to start studying.
I extracted silver from that ore easily, just adding SMB or iron sulfate, converted it with lye and sugar into metallic silver, and then melted it,, it was no problem,, Assaying a sample is unavailable in my country due to restrictions and banning,, thats why I am a little bit confused,, gold is there too,, but problematic .. You, or anyone, can check sedimentary soils in nature, specially of yellow, brown and black colors that dyes hands easily,, if there is an xrf device around, that would help alot,,,
Did he? I need to start learning reading, then
Not sure pal, I was told that oxalic acid precipitates metallic gold,, but not sure what would happen if silver is there, too !!
Martijn
Well-known member
Could be. Citric acid also works i think.
But where did you hear that? Any source?
We try to keep the chemistry inorganic. Oxalic acid is organic.
Someone else might have the knowledge to understand your question better.
This forum is great and one of its kind, I keep visiting it from time to time to learn things, but it really should cover all aspects regarding precious metals chemistry, its a suggestion, hoping to make it the No.1 destination of people interested in its topics,, thank you.
Martijn
Well-known member
I did say consider smelting, and you say it evaporates, or does it decompose at 210 C? releasing the carbon and becoming an oxide? And how does it behave in a flux or when roasted?
do you actually have silver carbonate? how do you know?
Martijn
Well-known member
All aspects that have been asked on this forum are covered, just not conveniently categorized in a single thread, you will have to puzzle and search for it, then when you think you have found the consensus, there will always be someone that disagree.
We have the entire DNA strand, but it's scattered in pieces over thousands of posts.
One thing we do agree on are proven methods and practices that work, and Misss Hoke's fine work, retouched and updated by Dave if i'm correct.
If you have a specific question about a subject you will get the replies you need. "let's discuss everything" is a bit vague.
One gets lost searching google for the right info, they say carbinate minerals decomposes at 200 C, others say they evaporate at around 300 C !! I, myself, would go with both, I roast the soil and find not well melted bars shaped under the surface (closer to heat resource) but not at the top of the soil!! I have seen evaporation myself when smelting, now that cant be sulfur or sulfides of any kind as the soil was already roasted. I assume its a carbonate ore due to the violent of reaction with any single acid, such a thing happen when an acid reacts with an alkali,, it bubbles ( mostly due to carbon dioxide release),, thats what I see when adding sodium carbonate to an acid,, I have no other way to find out what exactly it is, or what it contains, but experimenting this way
