Method for separating and isolating precious metals from non...

Details Method for separating and isolating precious metals from non... Method for separating and isolating precious metals from non...

C - Chemistry, Metallurgy

22

B

C22B 11/08 (2006.01) B01D 61/02 (2006.01) B01D 61/58 (2006.01) C22B 3/20 (2006.01) C22B 3/22 (2006.01)

Patent

CA 2293691

A method for separating gold and/or silver from copper or other contaminant metals is provided in which a suitable filter membrane (64), particularly a nanofilter, is used to form a retentate (134) containing most of the multivalent metal cyanide complexes and a permeate (135) containing most of the precious metal cyanide complexes. The process is particularly applicable to the recovery of gold and/or silver from ores containing these metals and one or more contaminant metals. The precious metal can thereafter be recovered from the permeate (135) and the metal in the multivalent metal cyanide complex from the retentate (134).

Cette invention se rapporte à un procédé servant à séparer l'or et/ou l'argent du cuivre ou d'autres métaux contaminants. Dans ce procédé on utilise une membrane à filtre approprié (64), en particulier un nanofiltre, pour former un rétentat (134) contenant la majeure partie des complexes cyanure et métaux multivalents et une perméat (135) contenant la majeure partie des complexes cyanure et métaux précieux. Ce procédé est particulièrement approprié pour extraire l'or et/ou l'argent de minerais contenant ces métaux ainsi qu'un ou plusieurs métaux contaminants. Le métal précieux pet ensuite être extrait du perméat (135) et le métal du complexe cyanure et métaux multivalents peut être extrait du rétentat (134).

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