化学学报 ›› 1989, Vol. 47 ›› Issue (6): 557-562. 上一篇    下一篇

研究论文

螯合-酸性磷萃取剂对铀(VI)的协同萃取

毛家骏;王丽娟;陈与德   

  1. 复旦大学原子核科学系
  • 发布日期:1989-06-15

Synergistic extraction of uranium (VI) with chelating-acidic organophosphorus extractants

MAO JIAJUN;WANG LIJUAN;CHEN YUDE   

  • Published:1989-06-15

本文研究了螯合-酸性磷协同萃取体系─1-苯基-3-甲基-4-(2'-氯苯甲酰基)-5-吡唑啉酮(PMCBP)与磷酸二(2-乙基己基)酯(HDEHP)和2-乙基己基膦酸-单-2-乙基己基酯(HEHEHP)的氯仿溶液从硫酸介质中对铀(VI)的萃取。实验发现均有明显的协同效应存在。采用斜率法测定了协萃配合物的组成为UO2HA2X和UO2HA2HXX'的混合物, 计算了它们的萃取平衡常数, 讨论了协萃机理。

关键词: 反应机理, 铀, 苯 P, 苯甲酸 P, 平衡常数, 吡唑酮 P, 螯型络合物萃取, 协同萃取, 乙基己基膦酸单乙基己酯, 磷酸二(乙基己基)酯

A study of the synergistic extration of U(VI) from H2SO4 solution with the chelating agent 1-phenyl-3-methyl-4-(2'-chlorobenzoyl)pyrazo-5-one together with di-(2-ethylhexyl)phosphoric acid and also mono-(2-ethylhexyl)-2-ethylhexylphosphate is described. The synergistic extration species is not an individual complex, but rather a mixture of uranyl complexes. The mechanisms of extration are discussed.

Key words: REACTION MECHANISM, URANIUM, BENZENE P, BENZENECARBOXYLIC ACID P, EQUILIBRIUM CONSTANT, PYRAZOLONE P, CHELATE COMPLEX EXTRACTION, SYNERGIC SOLVENT EXTRACTION, ETHYLHEXYL PHOSPHONIC ACID MONOETHYL HEXYLESTER, DI(ETHYLHEXYL) PHOSPHORIC ACID

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