Process for production of CoCl.sub.2 solution from cobaltic oxide-hydrate
US4394366A · kind A · utility
1Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1981 |
| Grant date | Jul 19, 1983 |
| Priority date | — |
| Expiry date | May 4, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01G51/085
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention is concerned with a process for dissolving oxidic trivalent cobalt compounds in hydrochloric acid while avoiding the generation of chlorine. It includes the following steps (a) slurrying in water the trivalent cobalt compound to be dissolved and (b) treating the resulting slurry with a reduction agent from the group consisting of methanol, formaldehyde and formic acid and with hydrochloric acid. The contact of the hydrochloric acid with the slurry should occur in the presence of the reducing agent. The rate of acid addition should be controlled to maintain the slurry at a pH above 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.