Regeneration of cyanide by oxidation of thiocyanate

Details Regeneration of cyanide by oxidation of thiocyanate Regeneration of cyanide by oxidation of thiocyanate

C - Chemistry, Metallurgy

01

C

C01C 3/02 (2006.01) C01C 3/08 (2006.01) C22B 3/06 (2006.01) C22B 11/08 (2006.01)

Patent

CA 2156440

Provided is a method for regenerating cyanide from thiocyanate. The method comprises contacting the thiocyanate with an oxidizing gas containing ozone, generally a mixture of oxygen and ozone. The pH of the contacting medium is generally less than 7.0 to assure that HCN is the predominant species relative to CN-. The method has important applications to processes involving cyanidation procedures, such as gold leaching, plating and coal conversion.

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