Recovery of precious metals

Details Recovery of precious metals Recovery of precious metals

C - Chemistry, Metallurgy

07

C

53/233, 402/364,

C07C 279/04 (2006.01) C01G 5/00 (2006.01) C01G 7/00 (2006.01) C07D 233/48 (2006.01) C22B 3/26 (2006.01) C22B 11/08 (2006.01)

Patent

CA 1340385

Recovery of precious metals such as gold and silver from aqueous cyanide solutions thereof, by contact with a reagent containing a guanidine functionality. The guanidine reagent extracts the precious metal from the aqueous solution which is subsequently stripped from the guanidine reagent and recovered by conventional methods. Certain novel guanidine compounds suitable for extracting gold and silver are disclosed.

527385

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