Process and apparatus for recovering precious metals from...

Details Process and apparatus for recovering precious metals from... Process and apparatus for recovering precious metals from...

C - Chemistry, Metallurgy

22

B

53/168, 53/220,

C22B 7/00 (2006.01) C22B 11/04 (1980.01)

Patent

CA 1152756

Abstract of The Disclosure Process and apparatus for recovering a precious metal, either as pure metal or in alloyed form, from a bimetallic material in which the precious metal is mechanically bonded to a base material comprising at least one base metal, e.g., copper, brass or bronze. The base material is leached off with An ammoniacal solution of an ammonium salt, preferably ammonium carbonate, using a leaching liquid containing reactive oxygen. The base metal or metals are recovered as metal com- pounds by thermally decomposing the resulting pregnant leach liquor; and the ammonia and ammonium salt are reconstituted for recycling. The method and apparatus are particularly suited for recovering karat gold from filled gold scrap.

358626

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