中华医学超声杂志

应用化学 ›› 1992, Vol. 0 ›› Issue (4): 21-25.

• 研究论文 • 上一篇    下一篇

二(2-乙基己基)膦酸从盐酸介质中萃取钪(Ⅲ)、钇(Ⅲ)、镧系离子(Ⅲ)和铁(Ⅲ)

薛理珍, 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, 长春 130022
  • 收稿日期:1991-01-09 修回日期:1991-08-20 出版日期:1992-08-10 发布日期:1992-08-10
  • 基金资助:
    国家自然科学基金

EXTRACTION OF SCANDIUM(Ⅲ),YTTRIUM(Ⅲ),LANTHANIDE(Ⅲ) AND IRON(Ⅲ) FROM HYDROCHLORIC ACID SOLUTIONS WITH DI-(2-ETHYLHEXYL) PHOSPHINIC ACID

Xue Lizhen, Li Deqian   

  1. Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1991-01-09 Revised:1991-08-20 Published:1992-08-10 Online:1992-08-10

PDF

432

被引次数

11

摘要： 本文研究了二(2-乙基己基)膦酸(H[DEHP])的正辛烷溶液从盐酸介质中萃取钪(Ⅲ)、钇(Ⅲ)、镧系离子(Ⅲ)和铁(Ⅲ)的平衡规律。结果表明,H[DEHP]对上述离子的萃取次序是Sc3+>Fe3+>Lu3+>Yb3+>Er3+>Y3+>Ho3+。讨论了Sc(Ⅲ)与Fe(Ⅲ)、Y(Ⅲ)、Ln(Ⅲ)(镧系离子)以及Fe(Ⅲ)与重镧系离子(Ⅲ)分离的可能性,并与HEH[EHP]萃取上述离子的性能进行了比较。借助IR、NMR和斜率法,饱和法研究了低酸度下H[DEHP]萃取Sc(Ⅲ)、Y(Ⅲ)和Ln(Ⅲ)的平衡反应,计算了浓度平衡常数和萃取反应的热力学函数。

关键词: 二(2-乙基己基)膦酸, 萃取机理, 钪、钇、镧系离子, 铁

Abstract: The extraction equilibrium of Sc(Ⅱ), Y(Ⅲ), Ln(Ⅲ)(Ln=Ho, Er, Yb, Lu) and Fe(Ⅲ) from HCl solutions with H(DEHP) in n-octane has been investigated. The order of extractability of the above elements is found as follows:ScLu>Yb>Er>Y>Ho. Y lies between Ho and Er. It is possible to separate Se(Ⅱ) from Fe(Ⅲ) and Ln(Ⅲ), and heavy lanthanide(Ⅲ) each other by H(DEHP).By the methods of slope analysis, saturation capacity and IR, NMR·spectra, the composition of extracted complexes of Sc(Ⅲ) and Yb(Ⅲ) with H(DEHP) has been determined to be Sc(HL2)3 and YbL3(HL2). The extraction mechanism of rare earths(Ⅲ) has been obtained.The equilibrium constants and thermodynamic functions of extraction reactions have also been calculated.

Key words: diethylhexyl phosphinic acid, extraction mechanism, scandium(Ⅲ), yttrium(Ⅲ), lanthanide(Ⅲ), iron(Ⅲ)

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