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咪唑类离子液体[C10mim][NTf2]萃取铈(IV)

郭庆伟,路文娟,王维,卢艳敏,张艺,杨延钊*   

  1. (山东大学化学与化工学院，特种功能聚集体材料教育部重点实验室 济南 250100)
  • 收稿日期:2011-08-22 修回日期:2011-09-20 出版日期:2012-07-10 发布日期:2012-07-10
  • 通讯作者: 杨延钊，教授; Tel:0531-88365431; Fax:0531-88564464; E-mail:yzhyang@sdu.edu.cn; 研究方向：分离与纯化
  • 基金资助:
    国家自然科学基金（20876089,21076115）山东省自然科学基金（ZR2010BM019）资助项目

Extraction of Cerium(Ⅳ) by Ionic Liquid [C10mim][NTf2]

GUO Qingwei, LU Wenjuan, WANG Wei, LU Yanmin, ZHANG Yi , YANG Yanzhao*   

  1. (School of Chemistry and Chemical Engineering,Shandong University,Ji′nan 250100)
  • Received:2011-08-22 Revised:2011-09-20 Published:2012-07-10 Online:2012-07-10
  • Contact: YANG Yan-Zhao

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摘要： 以咪唑类离子液体1-癸基-3-甲基咪唑三氟磺酰亚胺盐[C10mim][NTf2]为萃取剂，研究了其对铈(Ⅳ)的萃取行为，分别考察了萃取时间、料液浓度、硝酸浓度、离子液体咪唑环上烷基链长、无机盐浓度和温度对萃取过程的影响。 热力学计算表明，萃取过程是自发的放热过程。 推测可能的萃取机理是阴离子交换机理。 对萃取液进行了反萃考察，在硫酸浓度为1.0 mol/L时，反萃率为85.1%。

关键词: 离子液体, [C10mim][NTf2], 铈(IV), 萃取

Abstract: The extraction behavior of Ce(Ⅳ) from HNO3 medium by ionic liquid [C10mim][NTf2] was investigated. The effects of various parameters including time, feed concentration, HNO3 concentration, alkyl chain length, salt concentration and temperature on the extraction efficiency of Ce(Ⅳ) was measured. Enthalpy value of the extraction was calculated, which indicated the extraction of Ce(Ⅳ) is a spontaneously exothermic process. A plausible anion exchange mechanism was proposed for this process. The backward extraction efficiency of the Ce(Ⅳ) was 85.1% using 1.0 mol/L H2SO4 as strippant.

Key words: ionic liquids, [Cnmim][NTf2], cerium, extraction

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