Extraction of U(VI) and Th(IV) with a novel extractant N, N'-tetrahexylmalonamide (THMA) in toluene

Sun Guo-Xin，

Han Jing-Tian，

Bao Bo-Rong，

Bao Meng，

Cui Yu，

Liu Chang-Xin

Nuclear Science and Techniques

Vol.9, No.2

pp.115-117

Published in print 01 May 1998

30500

The dependence of THMA extraction behaviour for U(VI) and Th(IV) on nitric acid concentration, THMA concentration and molecular structure of extracted complex has been studied. For nitric acid solutions of 3.0 mol/L a coordinative mechanism may possibly dominate in the extraction of metal cations. The complex composition of UO₂ (NO₃)₂(THMA)₂, Th(NO₃)₄(THMA)₂ and Th(NO₃)₄ (THMA)₃ are proved.

MalonamideSolvent extractionUranyl nitrateThorium nitrateNN'-tetra-hexylmalonamide (THMA)

References

Musicas C, Hubert H. Solvent Extr Ion Exch, 1987, 5(5): 877

Wang You-Shao. PhD Thesis, Shanghai Institute of Nuclear Research, the Chinese Academy of Sciences, 1997

Cuillerdier C, Musicas C, Nigond L. Sep Sci Technol, 1993, 28(1 〜3): 155

Sun Guo-Xin, Wang You-Shao, Bao Bo-Rong et al. Nucl Sci Tech, 1997, 8(3): 190

Wang You-Shao, Sun Guo-Xin, Li Yu-Lan et al. Nucl Sci Tech, 1997, 8(4): 232