Essentially complete recovery of uranium, yttrium, thorium and rare earth values from phosphate rock during wet-process production of phosphoric acid therefrom
US4636369A · kind A · utility
1Cited by
12References
11Claims
0Family size
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Key dates
| Filing date | Nov 10, 1983 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Nov 10, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B60/0291
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The uranium, yttrium, thorium and rare earth values contained in a phosphate rock are essentially totally recovered therefrom by, during the wet-process preparation of phosphoric acid from said phosphate rock, acidulating same in the presence of aluminum and/or iron, and optionally silica, and thence recovering said values from the phosphoric acid thus produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.