Method for producing fine spherical particles of carbonate or hydroxide of nickel, cobalt or copper
US6197273A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2000 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Mar 22, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/62
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides a process for production of fine spherical particles of a carbonate or a hydroxide of nickel, cobalt or copper which comprises: dissolving a carbonate or a hydroxide of nickel, cobalt or copper having the general formula (I) EQU M(CO.sub.3).sub.x/2.(OH).sub.y wherein M represents Ni, Co or Cu, and x and y are numerals satisfying the followings: 0.ltoreq.x.ltoreq.2, 0.ltoreq.y.ltoreq.2 and x+y=2, in aqueous ammonia, converting the resulting solution to a W/O emulsion containing droplets of the solution in a non-aqueous medium, and then removing volatile components including ammonia from within the droplets, thereby precipitating a basic carbonate or a hydroxide of a metal selected from nickel, cobalt and copperin the droplets. The fine spherical particles of a carbonate or a hydroxide of nickel, cobalt or copper obtained according to the process of the invention are especially useful as a precursor for the manufacture of uniform, fine spherical particles of nickel, copper or cobalt metal, as well as useful as themselves as a catalyst for use in organic synthesis, a carrier, a pigment, a filler or a glaze.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.