Title:
【発明の名称】金属コバルト粉の製造方法
Document Type and Number:
Japanese Patent JPH08503999
Kind Code:
A
Abstract:
A process for the production of powdered metallic cobalt by reduction of cobaltous ammonium sulphate solutions. A soluble silver salt, preferably silver sulphate, is added in an amount to provide a soluble silver to cobalt weight ratio in the range of 1 to 10 g silver:1 kg cobalt, an organic dispersant such as bone glue or polyacrylic acid, or mixture thereof, is added in an amount of 0.01. to 2.5% of the weight of the cobalt, an ammonia to cobalt mole ratio of about 1.5:1 to 3.0:1 is established, and the solution is heated to a temperature in the range of 150 to 250 DEG C., preferably about 175 DEG C., with agitation under a hydrogen pressure of 2500 to 5000 kPa for a time sufficient to reduce the cobaltous sulphate to cobalt metal powder.
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Inventors:
Curie, John, Sea.
Sutherland, Bruce, Earl.
Chaye, Hugh, Sea.
Sutherland, Bruce, Earl.
Chaye, Hugh, Sea.
Application Number:
JP51050194A
Publication Date:
April 30, 1996
Filing Date:
October 26, 1993
Export Citation:
Assignee:
Sherit Incorporated
International Classes:
B22F9/26; B22F9/24; B23D61/18; B24D3/06; B24D3/10; C22B3/26; C22B3/44; C22B23/00; C22C19/07; C22C26/00; C22B; (IPC1-7): B22F9/26
Attorney, Agent or Firm:
Nobuo Tabuchi (1 outside)