Process to regenerate cyanide from thiocyanate Process to recover gold from ore and process to oxidize thiocyanate to free cyanide in a column reactor

摘要

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.