Catalytic hydrogen reduction of metals from solutions

Details Catalytic hydrogen reduction of metals from solutions Catalytic hydrogen reduction of metals from solutions

C - Chemistry, Metallurgy

22

B

53/378

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

Patent

CA 1077279

CATALYTIC HYDROGEN REDUCTION OF METALS FROM SOLUTIONS Abstract of Disclosure An improved method is provided for efficiently pre- cipitating metal powder selected from the group consisting of nickel, cobalt and copper from aqueous solutions using sulfur- free hydrogen at elevated pressure and temperature, the improve- ment residing in adding to the solution a small but effective amount of a catalyst as an anti-plating agent, said catalyst comprising an alkali metal or ammonium salt of a copolymer of maleic acid anhydride and an unsaturated branched chain ali- phatic olefinic hydrocarbon containing 4 to 10 carbon atoms.

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