Coupled cationic and anionic method of separating uranium

Details Coupled cationic and anionic method of separating uranium Coupled cationic and anionic method of separating uranium

1973-11-01

1976-06-29

Lechert, Jr., Stephen J.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 10, 423253, 2523011R, B01D 1100

Patent

active

039668720

ABSTRACT:
Uranium is separated from contaminating metal ions in an aqueous feed liquor containing the uranyl ion. The liquor is extracted with a first, non-interfering, waterimmiscible, organic solvent containing a reagent which reacts with the uranyl ion to form a complex soluble in the organic solvent. The organic solvent is scrubbed with water if necessary, then stripped with a stripping liquor of an aqueous sulfuric acid liquor having a pH of about 0.5 to about 6 containing a reducing ion or an aqueous carbonate solution having a pH of about 8 to about 9. If the sulfuric acid liquor is used the stripped uranous ion is oxidized and the sulfuric acid liquor is diluted to prevent the precipitation of a uranium complex. The stripping liquor is extracted with an amine liquor comprising a second, noninterfering, water-immiscible, organic solvent and a tertiary or quaternary amine. The amine liquor is stripped with an ammonium carbonate solution to precipitate a uranium complex. The uranium complex is filtered off and may be calcined to produce U.sub.3 O.sub.8 or UO.sub.2.

REFERENCES:
patent: 2859094 (1958-11-01), Schmitt et al.
patent: 3052513 (1962-09-01), Crouse
patent: 3083076 (1963-03-01), Drobnick et al.
patent: 3835214 (1974-09-01), Hurst et al.

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