中华医学超声杂志

应用化学 ›› 1998, Vol. 0 ›› Issue (1): 89-91.

• 研究论文 • 上一篇    下一篇

两相滴定法对HEH/EHP萃取锶(Ⅱ)的机理研究

乐善堂1, 孙都成2, 马根祥3, 李德谦3   

  1. 1. 湖北师范学院化学系 武汉;
    2. 新疆大学化学系 乌鲁木齐;
    3. 中国科学院长春应用化学研究所稀土化学与物理开放实验室 长春 130022
  • 收稿日期:1997-06-19 修回日期:1997-09-10 出版日期:1998-02-10 发布日期:1998-02-10
  • 基金资助:
    国家科委攀登项目;湖北省高校重点科研基金

Extraction Mechanism of Sr(Ⅱ) with HEH/EHP by Two-Phase Titration Method

Yue Shantang1, Sun Ducheng2   

  1. 1. Department of Chemistry, Hubei Normal University, Wuhan;
    2. Department Of Chemistry, Xinjiang Univeristy, Urumchi;
    3. Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1997-06-19 Revised:1997-09-10 Published:1998-02-10 Online:1998-02-10

PDF

383

被引次数

3

摘要： 由于2-乙基己基麟酸单(2-乙基己基)醋a比二(2-乙基己基)磷酸(HDEHP)的高,从而用HEH/EHP萃取金属离子时所需的水相酸度低,反萃容易,国内外对HEH/EHP萃取金属离子的机理研究较多[1~3],且用于工业生产.但用两相滴定法研究较少[4,5].在确定机理和萃合物组成时,两相滴定法比传统的斜率法快速简便,试剂消耗少.

关键词: 2-乙基已基膦酸单(2-乙基已基)酯, 锶, 萃取, 机理, 两相滴定法

Abstract: The extraction mechanism of Sr(Ⅱ) from HNO3 medium with HEH/EHP in n-oc-tane has been investigated by a two-phase titration method and the extracted complex hasbeen determined to be SrA2· 3.9HA.The extraction equilibrium constant calculated was logKex = -5.42.

Key words: ethylhexylphosphonic acid mono-ethylhexyl ester, strontium, extraction, mechanism, two-phase titration method

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