C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/178
C22B 60/02 (2006.01) C22B 3/38 (2006.01) C22B 60/04 (2006.01) G21C 19/46 (2006.01) G21F 9/00 (2006.01)
Patent
CA 1106615
ABSTRACT OF THE INVENTION A process for rendering actinide values recoverable from sodium carbonate scrub waste solutions containing these and other values along with organic compounds resulting from the radio- lytic and hydrolytic degradation of neutral organophosphorous extractants such as tri-n butyl phosphate (TEP) and dihexyl- N,N-diethyl carbamylmethylene phosphonate (DHDECMP) which have been used in the reprocessing of irradiated nuclear reactor fuels. The scrub waste solution is preferably made acidic with mineral acid, to form a feed solution which is then contacted with a water-immiscible, highly polar organic extractant which selectively extracts the degradation products from the feed solu- tion. The feed solution can then be processed to recover the actinides for storage or recycled back into the high-level waste process stream. The extractant is recycled after stripping the degradation products with a neutral sodium carbonate solution.
328178
Horwitz E. Philip
Mason George W.
Meredith & Finlayson
United States Of America (government Of The) United States Depar
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