Silver recovery method and apparatus

Details Silver recovery method and apparatus Silver recovery method and apparatus

C - Chemistry, Metallurgy

22

B

53/229, 23/412

C22B 11/08 (2006.01) C22B 7/00 (2006.01)

Patent

CA 1143950

Abstract A silver recovery method and apparatus performing highly specific separation of silver from source material containing organic and inorganic materials, including transition metals, comprising the steps of digesting source material with nitric acid solution to form an acidic reaction mixture; thereafter adding increments of sodium or potassium cyanide solution to the separated liquid phase of the reaction mixture; discontinuing addition of cyanide solution when silver(I) cyanide precipitate ceases to form after incremental additions of cyanide solution; and separating silver(I) cyanide precipitate of high purity from the liquid phase of the reaction mixture.

342797

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