Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal
Patent
1977-06-01
1981-11-03
Schafer, Richard E.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Radioactive metal
423251, C01G 5600
Patent
active
042985790
ABSTRACT:
Conversion of plutonium nitrate containing americium as a contaminant into plutonium dioxide while concurrently preventing americium contaminant from passing into the plutonium dioxide product. Discontinuous precipitation of plutonium oxalate is effected by maintaining the Pu nitrate-nitric acid solution containing americium in a reaction vessel at 60.degree.-95.degree. C., adding granular solid oxalic acid or solid ammonium oxalate in freeflowing form substantially free of clusters and lumps in stoichiometric deficiency of up to 7% of oxalic acid for reaction with the Pu in the solution; separating resultant Pu oxalate precipitate into which at least a portion of the americium contaminant has been prevented from entering, and calcining the purified Pu oxalate precipitate to PuO.sub.2.
REFERENCES:
patent: 2833800 (1958-05-01), Mastick et al.
patent: 2867640 (1959-01-01), Gofman
patent: 2868620 (1959-01-01), Garner
patent: 2906597 (1959-09-01), Ritter et al.
patent: 4025602 (1977-05-01), Campbell et al.
Doty, J. W. et al., "Preparation of Micron-Sized 238 PuO.sub.2 " In J. of Nuc. Matr. 35(2): 247-249, 1970.
Koch Karl-Heinz
Kuhn Karl-Dieter
Alkem GmbH
Lerner Herbert L.
Schafer Richard E.
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