Process for the recovery in the form of tetravalent fluoride of uranium extracted from phosphate-bearing solutions with the addition of metalic ions
US4758411A · kind A · utility
1Cited by
9References
12Claims
0Family size
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Inventor
Key dates
| Filing date | Nov 6, 1985 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Nov 6, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the recovery of uranium which has been extracted from phosphate-bearing solutions by means of an organic solvent and which is re-extracted from said solvent by means of hydrofluoric acid is disclosed. The process is characterized in that sodium ions are introduced into the solution of hydrofluoric acid, while aluminum and magnesium ions may also be added to the sodium ions. That solution may be produced by recycling of a fraction of the suspension of fluoride from the re-extraction step, after having separated the solvent, and to which a make-up of sodium, aluminum and magnesium ions and hydrofluoric acid was added.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.