Extraction of uranium from phosphoric acid using supported extractants
US4402917A · kind A · utility
7Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1980 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Sep 5, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B60/0243
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Uranium is extracted from phosphoric acid with organophosphorus extractants supported or impregnated on polymeric resins, and especially macroreticular resins. Suitable extractants include mono and dialkylphenyl esters of phosphoric acid. Uranium may be stripped from the supported or impregnated resins with hotter or more concentrated phosphoric acid, optionally with oxidation to hexavalent form, or with aqueous fluoride solutions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.