Method of recovering uranium

Details Method of recovering uranium Method of recovering uranium

1980-12-24

1984-10-09

Doll, John

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 15, 423 17, 423253, C01G 4300

Patent

active

044760990

ABSTRACT:
Uranium is recovered from a carbonate leach solution containing a dissolved uranium salt and a monovalent ion. The pH of the leach solution is adjusted to about 5 to about 7.5, and preferably to about 6 to about 7. Phosphate ion is then added to typical in-situ leach solutions in an amount from about 10 to about 30 mole % in excess of the amount needed to stoichiometrically react with the uranium in said solution. This results in the precipitation of a compound made up of the monovalent ion, uranium, and the phosphate ion, which is insoluble in the solution. The precipitate is then separated from the solution preferably by means of a centrifuge or a vortex clarifier. It can then be dissolved in acid, and the uranium extracted into an organic solvent such as DEHPA-TOPA in kerosene.

REFERENCES:
patent: 2780519 (1957-02-01), Kaufman
patent: 2797143 (1957-06-01), Arendale
Mellor, A Comprehensive Treatise on Inorganic and Theoretical Chemistry, vol. XII, Longmans Green & Co., (1932), pp. 128-138.
Klygin et al., in Chemical Abstracts, vol. 56, (1961), #1996h.

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