Method for separation of cobalt from nickel
US4965116A · kind A · utility
0Cited by
8References
4Claims
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Assignee
Inventors
Key dates
| Filing date | Sep 11, 1989 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Sep 11, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B23/0484
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method is disclosed for separating cobalt from nickel which consists essentially of adjusting the pH of a cobalt chloride solution containing nickel to about 3 to about 5 with a base, adding hypochlorite to the resulting pH adjusted solution in an amount equal to at least the stoichiometric amount required to oxidize essentially all of the cobalt to the .sup.+3 state, while maintaining the pH at about 3 to about 5 by addition of a base, to form a solid containing at least about 60% by weight of the cobalt in the .sup.+3 state and a liquor containing essentially all of the nickel, and removing the solid from the liquor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.