Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 1997, Vol. 8 ›› Issue (2): 103

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

Wang You-Shao1, Sun Guo-Xin1, Li Yu-Lan1, Bao Bo-Rong2, Liu Jian-Wei3, Sun Xiao-Yu3, Mao Jia-Jun3   

  1. 1 Shanghat Institute of Nuctear Mesearch, the Chinese Academy of octences, shanghar 201800;
    2 School of Chemistry and Chemical Engineering, Shanghai University, Shanghai 201800;
    3 Analysis and Research Centre, Tongji University, Shanghai 200094
Wang You-Shao, Sun Guo-Xin, Li Yu-Lan, Bao Bo-Rong, Liu Jian-Wei, Sun Xiao-Yu, Mao Jia-Jun. Solvent extraction of uranium(VI) and thorium(IV) in nitric acid solution by N,N,N',N'-tetrabutyladipicamide.Nuclear Science and Techniques, 1997, 8(2): 103

Abstract: 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.

Key words: N,N,N',N'-tetrabutyladipicamide(TBAA), Solvent extraction, Uranium(VI), Thorium(IV), Back-extraction, Salting-out effect, IR spectra