Process for producing cobalt powder
US4233063A · kind A · utility
21Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1979 |
| Grant date | Nov 11, 1980 |
| Priority date | — |
| Expiry date | May 14, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F9/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Cobalt is recovered from by-product streams from a basic process by heating the by-product streams containing ammonia for a sufficient period of time at a pH of about 8 to about 10 to produce an ammonia enriched vapor and an aqueous mixture comprising a solution substantially free of ammonia and another cobalt containing precipitate. The basic process is the type wherein cobalt ions in solution are complexed with ammonia in the presence of halide ions to form an ammine halide solution which is digested to form a cobalt containing precipitate. The precipitate is subsequently reduced to form a cobalt metal powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.