Process for producing nickel hydroxide from elemental nickel
US5545392A · kind A · utility
6Cited by
2References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1995 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Mar 13, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides a method of producing nickel hydroxide from elemental metal. Elemental nickel is first introduced into an aqueous ammonia or ammonia/ammonium salt solution capable of dissolving nickel. The potential, as measured by a standard calomel electrode, is allowed to reach a negative or reducing level. Oxygen is added to the aqueous solution at a rate that maintains the negative potential to facilitate the conversion of elemental nickel to nickel hydroxide. Nickel hydroxide may be readily precipitated from the aqueous solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.