Purification of phosphorus containing scheelite ore
US6051196A · kind A · utility
4Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1999 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Feb 9, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01F11/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for purifying a phosphorus containing scheelite ore is described wherein the calcite phase is selectively dissolved prior to dissolution of the apatite phase. Selective dissolution of the calcite produces several benefits: (1) a usable calcium solution, (2) enhanced apatite dissolution, and (3) lower volumes of toxic acid solution for disposal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.