Compositions – Absorptive – or bindive – and chemically yieldive
Reexamination Certificate
2005-04-04
2009-02-17
Bos, Steven (Department: 1793)
Compositions
Absorptive, or bindive, and chemically yieldive
C252S364000, C423S009000, C423S010000, C423SDIG014
Reexamination Certificate
active
07491345
ABSTRACT:
Extraction mixture capable of recovering actinide elements such as U, Pu and transplutonium elements from radioactive liquid waste in reprocessing of spent nuclear fuel. One embodiment of the extraction mixture includes a solution of bidentate organophosphorus extractant, dihexyl-N, N-diethylcarbamoyl phosphonate in a polar diluent, wherein bis-tetrafluoropropyl ether of diethylene glycol is used as the polar diluent at the following ratio of components: 0.1-1.2 M/L of bidentate extractant and the rest of diluent. Another embodiment of the extraction mixture includes a solution of bidentate organophosphorus extractant, phenyloctyl-N,N-diisobutylcarbamoylphosphine oxide in a polar diluent, wherein a mixture of metanitrobenzotrifluoride with trialkylphosphate is used as the polar diluent at the following ratio of components: 0.1-1.2 M/L of bidentate extractant, 0.3-1.1 M/L of TBP, and the rest of MNBTF.
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E.P. Horwitz et al. “The Truex Process—A Process for the Extraction of the Transuranic Elements From Nitric Acid Wastes Utilizing Modified Purex Solvent,” Solvent Extraction and Ion Exchange, vol. 3 (1&2), 1985. pp. 75-109.
Babain Vasily Alexandrovich
Fedorov Yury Stepanovich
Ozawa Masaki
Romanovsky Valery Nikolaevich
Shadrin Andey Yurievich
Bos Steven
Japan Nuclear Cycle Development Institute
Wenderoth , Lind & Ponack, L.L.P.
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