Extraction of Th(IV) from nitric acid with 4-benzoyl-2, 4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3- thione

Extraction of Th(IV) from nitric acid with 4-benzoyl-2, 4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3- thione 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 Naval Medical Research Institute, Shanghai, 200433 Naval Medical Research Institute, Shanghai, 200433 The BMPPT (4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione) was synthesized from BMPP. Its m.p. is 106-108℃. The results of the element analysis are as follows: C, 68.51%, H, 4.51%, N, 9.26%, S, 11.47%, which are in conformity with the theoretical value (C, 69.15%, H, 4.76%, N, 9.52%, S, 10.90%). The solvent extraction of Th 4+ from nitric acid solution by BMPPT in benzene was studied. The extraction ability of BMPPT is not so high as that of its parent (BMPP). The Th 4+ distribution ratio ( D Th ) increases with the increasing pH of the aqueous phase, and pH 1/2 for Th 4+ was 3.2 ([BMPPT]=0.10 mol/L). When the pH increases, the distribution ratio of Th 4+ increases linearly with the slope of 1.59. When the concentration of BMPPT increases, the distribution ratio of Th 4+ increases rapidly. The lg D Th -lg[BMPPT] is linear with the slope of 1.42 and the extraction mechanism is the cation ion-exchange. Solvent extraction 4-benzoyl-2 4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione (BMPPT) Th(IV) Distribution ratio of extraction References Smith B F , Jarvinen G D , Miller G G et al . Solvent Extraction and Ion Exchange , 1987 , 5 ( 5 ): 895 Solvent Extraction and Ion Exchange Ensor D D , Jarvinen G D , Smith B F . Solvent Extraction and Ion Exchange , 1988 , 6 ( 3 ): 439 Solvent Extraction and Ion Exchange Smith B F , Jarvinen G D , Jones M M et al . Solvent Extraction and Ion Exchange , 1989 , 7 ( 5 ): 749 Solvent Extraction and Ion Exchange Hannink N J , Hoffman D C , Smith B F . Solvent Extraction and Ion Exchange , 1992 , 10 ( 3 ): 431 Solvent Extraction and Ion Exchange Jarvinen G D , Smith B F , Ritchey J M . Inorganic Chimica Acta , 1987 , 129 : 139 Inorganic Chimica Acta Ma Heng-Li . Atomic Energy Science and Technology (in Chinese) , 1964 , 6 : 748 Atomic Energy Science and Technology (in Chinese) Wang Jin-Hua , Zhou Zu-Ming , Xu De-Min . Journal of of Nuclear and Radiochemistry (in Chinese) , 1992 , 14 ( 4 ): 226 Journal of of Nuclear and Radiochemistry (in Chinese) The Project Supported by the National Natural Science Foundation of China 1998-01-05 1998-05-01 2021-02-05 1998 Nuclear Science and Techniques 2 9