Process for the separation of rare earths and uranium of a UF.su

Details Process for the separation of rare earths and uranium of a UF.su Process for the separation of rare earths and uranium of a UF.su

1986-06-25

1988-05-17

Miller, Edward A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 8, 423 15, 423 18, 423 211, 423 215, C01G 4300

Patent

active

047449608

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.

REFERENCES:
patent: 2815264 (1957-12-01), Calkins et al.
patent: 3659128 (1975-11-01), Angstadt
patent: 3937783 (1976-02-01), Wamser et al.
patent: 4461748 (1974-07-01), Sabot et al.
Bailar et al., Comprehensive Inorganic Chemistry, vol. 4, pp. 50-53, Pergamon Press (1973), Oxford.

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