Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal
Patent
1980-07-17
1983-02-22
Sebastian, Leland A.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Radioactive metal
423122, 423261, C01G 43025
Patent
active
043748074
ABSTRACT:
In a process for converting UF.sub.6 into UO.sub.2, the UF.sub.6 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 (AlF.sub.3) therein and thereby maximize the precipitation potential of AlF.sub.3. 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 AlF.sub.3 precipitate which contains substantially no uranium.
REFERENCES:
patent: 3338683 (1967-08-01), Grant
patent: 3737513 (1973-06-01), Wiewiorowski et al.
patent: 4235860 (1980-11-01), Wohleber et al.
patent: 4238469 (1980-12-01), Schmidt et al.
Ishimi Hiroshi
Shimauchi Hisaaki
Tanaka Chuzaburo
Sebastian Leland A.
Sumitomo Metal Mining Company Ltd.
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