中华医学超声杂志

应用化学 ›› 1993, Vol. 0 ›› Issue (4): 72-74.

• 研究简报 • 上一篇    下一篇

二(2,4,4-三甲基戊基)膦酸萃取稀土离子

张晓凤, 李德谦   

  1. 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 130022 长春
  • 收稿日期:1992-08-10 修回日期:1992-12-16 出版日期:1993-08-10 发布日期:1993-08-10
  • 基金资助:
    国家自然科学基金资助课题

EXTRACTION OF RARE-EARTH IONS(Ⅲ) WITH BIS(2,4,4-TRIMETHYLPENTYL) PHOSPHINIC ACID

Zhang Xiaofeng, Li Deqian   

  1. Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun
  • Received:1992-08-10 Revised:1992-12-16 Published:1993-08-10 Online:1993-08-10

PDF

565

被引次数

93 | 13

摘要： 2-乙基己基膦酸单2-乙基己基酯(HEH/EHP)是目前稀土湿法冶金工业中应用最广泛的萃取剂。但存在重稀土离子反萃取酸度高,某些中、重稀土离子对的分离系数小、选择性不高等缺点。所以研究优于HEH/EHP的新萃取体系已引起人们极大的关注。近年来发现,二(2,4,4-三甲基戊基)膦酸(HBTMPP,HL)有可能是萃取稀土元素的有效萃取剂。由于其分子中不含酯氧原子,使得它的pKa值比HEH/EHP高。

关键词: 二(三甲基戊基)膦酸, 稀土离子(Ⅲ), 萃取平衡

Abstract: The extraction behavior of trivalent rare-earth ions (except Sc, Pm) in hydrochloric acid solution using a n-octane solution containing his(2,4,4-trimethylpentyl) phosphinic acid(HBTMPP) was studied. The mean separation factor (βzz+1) for the system was found to be 3.24. The system showed an advantage of higher selectivity and easier stripping ever that With HEH/EHP. The extraction mechanism for Er(Ⅲ) and Tm(Ⅲ) ions has been investigated by the method,of solpe analysis.The equilibrium constants of the extraction have been calculated and the IR and 1H NMR spectra of the Er (Ⅲ) complex have been discussed.

Key words: bis(trimethylpentyl) phosphinic acid, rare earth ions(Ⅲ), extraction

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