Process and apparatus for dissolving a mixture of oxides of uran

Details Process and apparatus for dissolving a mixture of oxides of uran Process and apparatus for dissolving a mixture of oxides of uran

1996-09-06

1998-04-28

Mai, Ngoclan

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

422159, 4221841, 422225, 422227, 422255, 205 44, 205 46, B01F 100

Patent

active

057458359

ABSTRACT:
A process and apparatus for dissolving a mixed oxide or mixture of oxides of uranium and plutonium. The powder is added with nitric acid to a chamber to dissolve uranium oxide, and the solution is circulated through a circuit of the apparatus with a portion of the solution passing through a filter. At least a portion of the filtered solution containing dissolved uranium oxide is removed from the apparatus, while returning non-filtered circulating solution containing non-dissolved plutonium oxide to the chamber. The removal of solution is then terminated, a monovalent silver salt is added and divalent silver is generated in-situ by electrolysis, the divalent silver causing dissolution of the plutonium oxide.

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patent: 5190623 (1993-03-01), Sasaki et al.
Electrogenerated Ag II for Recovery of PuO.sub.2 From Waste, ENC '94, Mouliney et al, Oct. 2-6, 1994, Lyon, France.

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