Sulfide precipitation method of separating uranium from group I

Details Sulfide precipitation method of separating uranium from group I Sulfide precipitation method of separating uranium from group I

1973-08-23

1977-01-11

Hunt, Brooks H.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 8, 423 11, 423 15, C01G 4300

Patent

active

040027163

ABSTRACT:
Uranium is separated from analytical Group II and Group III metal ions in an aqueous liquor containing uranyl ions. The liquor is extracted with a non-interfering, water-immiscible, organic solvent containing a reagent which will react with the uranyl ions to form a complex soluble in the solvent. If the liquor is acidic, the solvent is washed with water. Then to the solvent is added an aqueous solution containing about 0.5 to 1.0 mole per liter of (NH.sub.4).sub.2 CO.sub.3 or NH.sub.4 HCO.sub.3 ions and sufficient sulfide ions to precipitate the metal ions as sulfides. The solvent and the aqueous solution are separated and the sulfides filtered from the aqueous solution. The ammonium-uranyl-tricarbonate in the aqueous solution can then be precipitated by increasing the concentration of (NH.sub.4).sub.2 CO.sub.3 or NH.sub.4 HCO.sub.3 ions to about 1.5 to 2.5 moles per liter. The precipitate is filtered and calcined to obtain U.sub.3 O.sub.8 or UO.sub.2.

REFERENCES:
patent: 2815263 (1957-12-01), Eldredge
patent: 2949339 (1960-08-01), Marvin
patent: 3178257 (1965-04-01), Hart
patent: 3239306 (1966-03-01), Reusser et al.
patent: 3239307 (1966-03-01), Reusser
Palei, Analytical Chemistry of the Elements-Uranium, 1970, p. 265.
Hurst et al., ORNL-TM-2522 "Solvent Extraction of Uranium from Phosphoric Acid" pp. 1-39.

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