OXALATE COMPLEXATION IN DISSOLVED CARBIDE SYSTEMS
It has been shown that the oxalic acid produced in the dissolution of mixed uranium, plutonium carbides in nitric acid can account for the problems of incomplete uranium and plutonium extraction in the Purex process. Moreover, it was demonstrated that other identified products such as benzene polycarboxylic acids are either too insoluble or insufficiently complexing to be of concern. The stability constants for oxalate complexing of (UO-2)**2+ and Pu**4+ ions (as UO-2(C-2O-4), Pu(C-2O-4)-2+ and Pu(C-2O-4)-2, respectively) were measured in nitrate solutions of 4.0 molar ionic strength (0-4 HNO-3) by extraction of these species with TBP.
Bibliographic Reference: RADIOCHIMICA ACTA, VOL. 33 (1983), PP. 229-232
Record Number: 1989122078100 / Last updated on: 1987-01-01
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