Process for the separation of rare earths and uranium of a UF.sub.4 concentrate and for putting them into useful form
US4744960A · kind A · utility
3Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1986 |
| Grant date | May 17, 1988 |
| Priority date | — |
| Expiry date | Jun 25, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01F17/206
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a proces for separating rare earths and uranium from a UF.sub.4 concentrate and for placing them into useful form, comprising attacking the UF.sub.4 concentrate with potassium hydroxide, followed by nitric acid dissolution of the resulting precipitate, and extraction of the solution using an organic solvent. The extraction results in an organic solution containing purified uranyl nitrate, and an aqueous solution from which rare earths are precipitated by means of a base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.