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Q&As since 1989


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How to obtain yellow gold precipitate

2006

Dear Sir,

I would like to ask you a question about yellow gold powder. I wanted to know how to obtain yellowish precipitate of gold from cyanide or gold chloride solution. I have tried with some solutions but the gold is always brown in color.

Hope you would be able to reply back to me.

Yours Sincerely,
Raj Mani

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2006

Hi,
If it is gold chloride, add conc. sulfuric acid and boil , god reduces, or pass sulfur dioxide gas into it , or add sodium metabisulphite to reduce the gold in yellow form.or you can also add sodium borohydride , but reaction is very vigorous.If gold is in Potassium cyanide form , slowly add sulfuric acid into it under fume hood, and heat it, we can reduce gold out of it, see that you perform this GPC reaction in fume chamber to expel HCN gases liberated from it.

Hope this will help .

Panjala Mukesh
fashion jewelry mfgr.
Hyderabad, India

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hello. Since chlorine is produced through electrolysis, is it possible to separate chlorine from gold chloride solution leaving gold in solid state behind?
balasarravanan palanirajh

July 17, 2008