Process for the production of dicalcium phosphate
US4524054A · kind A · utility
4Cited by
2References
10Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 5, 1984 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Jan 5, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05B3/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the recovery of phosphate values from a phosphate ore, wherein the ore is leached with a mixture comprising water, sulphur dioxide and an organic carbonyl compound; the leach liquor containing dissolved phosphate values and calcium hydroxysulphonate is separated from any gangue and other insoluble material; and the leach liquor is treated to recover therefrom a phosphate-rich product and at least part of the sulphur dioxide and the carbonyl compound; characterized in that the leaching is carried out under conditions such that substantially no calcium hydroxysulphonate is precipitated at the leaching stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.