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 (4): 232

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N,N,N',N'-tetrabutylmalonamide as a new extractant for extraction of nitric acid and uranium(VI)

Wang You-Shao1, Sun Guo-Xin1, Li Yu-Lan1, Bao Bo-Rong1, Sun Xiao-Yu2 and Mao Jia-Jun2   

  1. 1 Shanghai Institute of Nuclear Research, the Chinese Academy of Sciences, shangha?r 201800;
    2 Centre of Analysis and Rescarch, Tongji University, Shanghai 200092
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Wang You-Shao, Sun Guo-Xin, Li Yu-Lan, Bao Bo-Rong, Sun Xiao-Yu and Mao Jia-Jun. N,N,N',N'-tetrabutylmalonamide as a new extractant for extraction of nitric acid and uranium(VI).Nuclear Science and Techniques, 1997, 8(4): 232

Abstract: N,N,N',N'-tetrabutylmalonamide (TBMA) is synthesized and used for extraction of uranyl(II) ion from nitric acid media in a diluent composed of 50% 1,2,4-trimethyl benzene (TMB) and 50% kerosene(OK). The effects of nitrie acid concentration, extractant concentration, temperature, salting-out agent (LiNO3) and back extraction on distribution coefficients of uranyl(II) ion have been studied. The extraction of nitrie acid is also studied. The main adduct of TBMA and HNO3 is HNO3-TBMA, and there are more than two kinds of adducts in 3.0 mol/L nitrie acid solutions, such as HNO3-TBMA, (HNO3)2-TBMA and (HNO3)3-TBMA. The complex formation of uranyl(II) ion, nitrate ion and TBMA (1:2:1) as extracted species is further confirmed by IR spectra of the saturated extraction of uranyl(II) ion with TBMA, and the values of thermodynamic parameters have also been calculated.

Key words: N,N,N',N'-tetrabutylmalonamide(TBMA), Solvent extraction, Uranium(VI), Saltingout agent, Back extraction