Production of pure cobalt metal powder

Details Production of pure cobalt metal powder Production of pure cobalt metal powder

1985-10-31

1986-09-16

Doll, John

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05BA, 75 97A, 75103, 75108, 75119, 423143, 423139, 423413, 423594, 423150, C22B 1500

Patent

active

046120394

ABSTRACT:
A method is disclosed for producing pure cobalt metal powder. The method involves reducing a cobalt containing source material to produce an intermediate cobalt metal, contacting this intermediate with an ammoniacal ammonium halide solution and a catalyst with oxidation to form a solution of hexamminecobalt(III) ions, removing insoluble material, and adding a sufficient amount of a halide salt to the solution to precipitate hexamminecobalt(III) halide which is separated from the mother liquor. The hexamminecobalt(III) halide precipitate is dissolved in water and the pH is adjusted to greater than about 10 with a base, while the solution is heated at a sufficient temperature for a sufficient time to form an insoluble cobalt oxide containing material which is separated from its mother liquor and reduced to pure cobalt metal powder.

REFERENCES:
patent: 4184868 (1980-01-01), Ritsko et al.
patent: 4208380 (1980-05-01), Hamalainen et al.
patent: 4214894 (1980-07-01), Ritsko et al.
patent: 4214896 (1980-07-01), Cherecnowsky
patent: 4278463 (1981-07-01), Vanderpool et al.

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