Catalytic hydrogen reduction of metals from solutions

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

1975-11-19

1976-11-02

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75108, 75117, 75119, C22B 1512, C22B 2304

Patent

active

039895092

ABSTRACT:
An improved method is provided for efficiently precipitating 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 improvement 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 aliphatic olefinic hydrocarbon containing 4 to 10 carbon atoms.

REFERENCES:
patent: 2734821 (1956-02-01), Schaufelberger
patent: 2740708 (1956-04-01), Papee
patent: 2805139 (1957-09-01), McGauley
patent: 2853374 (1958-09-01), Schaufelberger
patent: 2853380 (1958-09-01), Evans et al.
patent: 3156556 (1964-11-01), Meddings et al.
patent: 3694185 (1972-09-01), Kunda et al.
patent: 3775098 (1973-11-01), Kunda et al.

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