Document Type and Number:
Japanese Patent JPS5760291
Kind Code:
B2
Abstract:
In a process for converting UF6 into UO2, the UF6 is brought into contact with an aqueous aluminum nitrate solution. The resultant product is solvent extracted with tributyl phosphate to remove uranyl nitrate. The raffinate has a fluorine/aluminum (F/Al) weight ratio within the range of from about 0.5 to about 1.2. A sufficient quantity of hydrofluoric acid is added to the raffinate to minimize the solubility of aluminum fluoride (AlF3) therein and thereby maximize the precipitation potential of AlF3. Generally this occurs when sufficient hydrofluoric acid has been added to cause the F/Al weight ratio to be within the range of from about 1.8 to about 2.2. As a result of this treatment, the raffinate is divided into an uranium-containing aqueous solution and an AlF3 precipitate which contains substantially no uranium.
Inventors:
ISHIMI HIROSHI
SHIMAUCHI HISAAKI
TANAKA CHUZABURO
SHIMAUCHI HISAAKI
TANAKA CHUZABURO
Application Number:
JP9698779A
Publication Date:
December 18, 1982
Filing Date:
July 30, 1979
Export Citation:
Assignee:
SUMITOMO METAL MINING CO
International Classes:
C01B9/08; C01B21/46; C01F7/50; C01G43/025; C02F1/58; C22B60/02