Metal recovery

Details Metal recovery Metal recovery

C - Chemistry, Metallurgy

22

B

53/375

C22B 15/00 (2006.01) C22B 3/26 (2006.01) C22B 3/44 (2006.01)

Patent

CA 1125519

ABSTRACT OF DISCLOSURE A method of recovering metal values selected from gold, silver, copper and nickel from an activated carbon support 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 pre-treatment reagent, followed by desorbing the metal values from the support with water having a low concentration of metal cations such as deionised water, the method being characterised by the pre-treatment reagent which is a mixture of an organic solvent such as an alcohol or a ketone and an alkali metal cyanide or hydroxide solution.

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