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双功能离子液体[A336][P507]在盐酸和硝酸介质中对Sc(Ⅲ)的萃取

沈璐 ,  陈继 ,  邓岳锋

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引用本文: 沈璐, 陈继, 邓岳锋. 双功能离子液体[A336][P507]在盐酸和硝酸介质中对Sc(Ⅲ)的萃取[J]. 应用化学, 2016, 33(3): 330-335. doi: 10.11944/j.issn.1000-0518.2016.03.150305 shu
Citation:  SHEN Lu, CHEN Ji, DENG Yuefeng. Extraction of Sc(Ⅲ) Using a Bifunctional Ionic Liquid [A336][P507][J]. Chinese Journal of Applied Chemistry, 2016, 33(3): 330-335. doi: 10.11944/j.issn.1000-0518.2016.03.150305 shu

双功能离子液体[A336][P507]在盐酸和硝酸介质中对Sc(Ⅲ)的萃取

  • a.

    a. 中国科学院长春应用化学研究所稀土资源利用国家重点实验室 长春 130022;

  • b.

    b. 中国科学院大学 北京 100049

    • 通讯作者: 陈继,研究员;Tel/Fax:0431-85262646;E-mail:jchen@ciac.ac.cn;研究方向:离子液体在稀土绿色冶金过程中的基础及应用
  • 基金项目:

    国家自然科学基金（51174184） 

摘要: 利用双功能离子液体萃取剂三辛基甲基氯化铵2-乙基己基磷酸2-乙基己基酯盐（[A336][P507]）在HCl和HNO3介质中对Sc（Ⅲ）的萃取和分离。研究表明，萃取剂在低酸度条件下，对Sc（Ⅲ）有较好的萃取能力；但是当水相酸度从0.5 mol/L增加到4 mol/L，Sc（Ⅲ）的萃取率有较大程度的下降。并且讨论了在HCl介质和HNO3介质中，[A336][P507]萃取Sc（Ⅲ）的机理，由于Sc（Ⅲ）的半径最小，而且在萃取过程中存在P=O与P-O的竞争作用，使得其萃合物结构与轻稀土不同。水相中加入盐析剂NaCl或NaNO3对Sc（Ⅲ）的萃取有一定的促进作用；萃取过程的热力学参数的结果表明，萃取反应是放热反应。还研究了混合稀土中Sc（Ⅲ）和其它稀土离子的分离，在较低酸度的条件下萃取剂[A336][P507]对其它稀土离子的萃取可以忽略不计，因此该萃取体系对Sc（Ⅲ）和其它稀土离子有较好的分离效果，显示了本研究潜在的应用价值。

English

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  • 收稿日期:  2015-08-24
  • 网络出版日期:  2015-10-21
通讯作者: 陈斌, bchen63@163.com
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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