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

Extraction of U(VI) and Th(IV) with a novel extractant N, N'-tetrahexylmalonamide (THMA) in toluene 1 first-author 1 1 2 2 2 Shanghai Institute of Nuclear Research, the Chinese Academy of Sciences, Shanghai 201800 Shanghai Institute of Nuclear Research, the Chinese Academy of Sciences, Shanghai 201800 Department of Applied Chemistry, Institute of Shandong Building Materials Industry, Jinan 250022 Department of Applied Chemistry, Institute of Shandong Building Materials Industry, Jinan 250022 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 UO 2 (NO 3 ) 2 (THMA) 2 , Th(NO 3 ) 4 (THMA) 2 and Th(NO 3 ) 4 (THMA) 3 are proved. Malonamide Solvent extraction Uranyl nitrate Thorium nitrate N N'-tetra-hexylmalonamide (THMA) References Musicas C , Hubert H . Solvent Extr Ion Exch , 1987 , 5 ( 5 ): 877 Solvent Extr Ion Exch Wang You-Shao . PhD Thesis , Shanghai Institute of Nuclear Research, the Chinese Academy of Sciences , 1997 PhD Thesis Cuillerdier C , Musicas C , Nigond L . Sep Sci Technol , 1993 , 28 ( 1 〜3 ): 155 Sep Sci Technol Sun Guo-Xin , Wang You-Shao , Bao Bo-Rong et al . Nucl Sci Tech , 1997 , 8 ( 3 ): 190 Nucl Sci Tech Wang You-Shao , Sun Guo-Xin , Li Yu-Lan et al . Nucl Sci Tech , 1997 , 8 ( 4 ): 232 Nucl Sci Tech The Project Supported by the National Natural Science Foundation of China 1997-12-08 1998-05-01 2021-02-05 1998 Nuclear Science and Techniques 2 9