Recovery of precious metals and copper from copper/gold ores...

Details Recovery of precious metals and copper from copper/gold ores... Recovery of precious metals and copper from copper/gold ores...

C - Chemistry, Metallurgy

22

B

C22B 3/00 (2006.01) C22B 3/24 (2006.01) C22B 3/42 (2006.01) C22B 3/44 (2006.01) C22B 11/08 (2006.01) C22B 15/00 (2006.01)

Patent

CA 2326168

A process for the selective recovery of precious metals from a medium loaded with precious metals and base metals. The selective recovery of precious metals is achieved by exposing the medium to an aqueous solution containing a complex of formula MX2-, wherein M is a metal of group IB or IIB of the Periodic Table of Elements, and X is a monovalent radical. A second invention relates to the removal of copper from the medium whereby elution of copper is achieved by exposing the medium to an aqueous solution capable of oxidising Cu(I) to Cu(II) whilst not eluting precious metals from the medium.

Cette invention concerne un procédé qui permet d'extraire de manière sélective des métaux précieux dans un milieu qui est porteur de métaux précieux et de métaux communs. Cette extraction sélective des métaux précieux se fait en exposant le milieu à une solution aqueuse qui contient un complexe correspondant à la formule MX¿2??-¿ où M est un métal du groupe IB ou IIB du tableau de classification périodique des éléments, tandis que X représente un radical monovalent. Une seconde invention concerne l'extraction du cuivre de ce milieu. L'élution du cuivre se fait en exposant le milieu à une solution aqueuse capable d'oxyder le Cu(I) en Cu(II) sans pour autant éluer les métaux précieux dudit milieu.

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