Recovery of metal values

Details Recovery of metal values Recovery of metal values

C - Chemistry, Metallurgy

22

B

53/370

C22B 7/00 (2006.01) C22B 3/14 (2006.01) C22B 11/08 (2006.01) C22B 15/00 (2006.01)

Patent

CA 1097508

ABSTRACT OF DISCLOSURE The invention provides a method of recovering metal values selected from gold, silver, copper and nickel from a support such as activated carbon having one or more of these values adsorbed thereon in the form of an alkaline earth metal ionic complex, the metal value forming part of the anionic portion thereof, including the steps of contacting the support with a solution selected from the group of an alkali metal cyanide solution, an alkali metal hydroxide solution and a mixture thereof, followed by desorbing the metal values from the support with water having a low concentration of metal cations, preferably deionised or softened water.

282762

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