Solvent extraction of uranium(VI) and thorium(IV) in nitric acid solution by N,N,N',N'-tetrabutyladipicamide

Wang You-Shao，

Sun Guo-Xin，

Li Yu-Lan，

Bao Bo-Rong，

Liu Jian-Wei，

Sun Xiao-Yu，

Mao Jia-Jun

Nuclear Science and Techniques

Vol.08, No.2

pp.103-106

Published in print 01 May 1997

29500

N,N,N'N'-tetrabutyladipicamide(TBAA) has been synthesized, and applied to the extraction of U(VI) and Th(IV) from nitric acid solutions in a diluent composed of 0.50 volume fraction 1,2,4-trimethyl benzene(TMB) and 0.50 volume fraction kerosene(OK). The effects of the aqueous nitric acid concentration, extractant concentration, salting-out agent (LiNO₃) and temperature on extraction ability of TBAA for U(VI) and Th(IV) have been studied. Back extraction of U(VI) and Th(IV) from organic phases were performed by dilute nitric acid. The compositions of extracted complexes, equilibrium constants and enthalpies of extraction reactions have also been estimated. The IR spectra of extraction of U(VI) and Th(IV) have been studied.

N,N,N',N'-tetrabutyladipicamide(TBAA)Solvent extractionUranium(VI)Tho- rium(IV)Back-extractionSalting-out effectIR spectra

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