Production of ultrafine cobalt powder from dilute solution

Details Production of ultrafine cobalt powder from dilute solution Production of ultrafine cobalt powder from dilute solution

1977-05-12

1978-06-06

Stallard, W.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 5BA, 75119, C22B 2304

Patent

active

040934500

ABSTRACT:
A process for producing ultrafine cobalt powder includes providing an aqueous solution of cobalt ammine carbonate, with the concentration of cobalt ions being in the range of from about 1 to about 20 grams per liter (gpl). The solution is heated to drive off ammonia and carbon dioxide and precipitate ultrafine cobalt oxide. The cobalt oxide precipitate is then separated from the solution and heated in a reducing atmosphere to reduce the cobalt oxide to ultrafine cobalt powder.

REFERENCES:
patent: 2744003 (1956-05-01), Schaufelberger et al.
patent: 2853374 (1958-09-01), Schaufelberger
patent: 3775098 (1973-11-01), Kunda et al.
patent: 3975217 (1976-08-01), Kunda et al.

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