Process for making into useful products the uranium and rare earths contained in impure UF.sub.4 resulting from the extraction of uranium from phosphoric acid
US4585626A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1983 |
| Grant date | Apr 29, 1986 |
| Priority date | — |
| Expiry date | Jul 25, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B60/026
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for making into useful products the uranium and rare earths contained in impure uranium tetrafluoride resulting from the recovery of uranium from phosphoric acid, comprising dissolving it in a hot condition in a nitric medium in the presence of an aluminum compound, treating the resulting solution with a solvent for extracting uranyl nitrate, which contains a phosphoric ester, and separating from the aqueous phase from which the uranium is removed, the solvent which is charged with uranyl nitrate to be made into a useful product, which provides that, in order to achieve easy separation of the aqueous phase from which the uranium has been removed, from the uranyl nitrate extraction solvent: PA0 (a) The operation of dissolution of UF.sub.4 is carried out in two steps at a suitable temperature, the first step comprising introducing insufficient amounts of nitric acid and the aluminum compound for complete dissolution of the impure uranium tetrafluoride and keeping the resulting suspension in an agitated condition for a period of time of at least 0.5 hour, and the second step comprising introducing amounts of nitric acid and the aluminum compound, which are at least sufficien…
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