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Document Type and Number:
Japanese Patent JPH0319169
Kind Code:
B2
Abstract:
PURPOSE:To recover effectively uranium excellent in the purity by dissolving the nucleus fuel scrap contg. Gd2O3 in a mineral acid to solvent-extract uranium, washing an organic phase contg. uranium and thereafter back-extracting it with an aqueous system. CONSTITUTION:The nucleus fuel scrap contg. Gd2O3 is dissolved in a mineral acid such as nitric acid added with NaNO3. A solvent such as tributylphosphate is added to this soln. to solvent-extract uranium. The organic phase contg. utanium is washed with water or dilute nitric acid to transfer Gd content or the like to an aqueous phase. In this washing, the volume ratio of aqueous phase/organic phase is regulated to <=1/10. Uranium is back-extracted from the washed organic phase by using water or dilute mineral acid. In this way, uranium can be recovered in the excellent purity.

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Inventors:
TANAKA CHUZABURO
YAMA TERUYOSHI
MYAJIMA YOSHIKI
Application Number:
JP7621285A
Publication Date:
March 14, 1991
Filing Date:
April 10, 1985
Export Citation:
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Assignee:
SUMITOMO METAL MINING CO
International Classes:
C22B60/02; C01G43/00; G21C3/62; G21C19/48; G21F9/34



 
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