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topic 15640

Gold precipitation


Explain to me gold precipitation with sodium metabisulphite, and give their reactions, ok? I am a diploma chemical engineer

Bhavin Sadadiya
- Surendranagar, Gujarat, India

(2002)  2nd request


I want to know the process of gold leaching with HCl by using 35% Hydrogen Peroxide [linked by editor to product info at Amazon] as an oxidizing agent. please give me the answer of my question.

Thnx for favorable reply bye,

Bhavin Sadadiya
- Surendranagar, Gujarat, India


I'm very interested in your question. If now you have answer of your question. Please tell me . I'm studying gold leaching.

Thank you,

Chanwit Tuandum
- Thailand



There are several excellent books on precious metal refining available from International Precious Metal Institute (IPMI) as follows; "Refining Precious Metal Wastes" [link is to info about book at Amazon] by C.M.Hoke and "Small Scale Refining of Jewellers' Waste" [link is to product info at Amazon] by Roland Loewen. The books should answer most of your questions.

Good Luck & Best regards,

Jim Sivertsen
United Precious Metal Refining Co. Inc. - Alden, New York, U.S.A.


Some very fine precious metals are lost in furnacing within slags. Recovery using gravity concentration of slags is not the answer.

Is there a chemical method of extraction. CLS does not work because soda ash re-precipitates the metals at ph 7.

Can someone explain if simply hydrochloric acid will produce a chloride and what the reagent is to precipitate the metals. Sodium metabilsulphite works well under certain conditions and is selective as a reagent.

Don Buckley
hobbyist - Braidwood, NSW, Australia


I would like to find out is it possible to precipitate gold using sulphur dioxide.

Palesa Diale
Technician - Randburg, South Africa


Sulphur dioxide, which is available in compressed liquid form in tanks, but is not cheap, can be bubbled through a glass tube to precipitate auric chloride to gold mud powder. Some experts prefer this method.

Wilson Wheatcroft
- Holbrook, Arizona

February 26, 2008

I am jeya , a student of B.Tech Biotechnology . I have a question about the actual mechanism and percentage of recovery of gold using Chlorella vulgaris from goldsmith effluent.
To have a comparative study between Chlorella vulgaris and Scenedesmus quadricauda.

jeya ramasamy
student - Coimbatore,Tamil nadu, India

December 28, 2010

i did not neutralize the nitric acid and tried to precipitate with sodium metabisulphite, can neutralize acid after what is the process to save gold

reggie vega
hobby - tukwila Washington

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