CIESC Journal ›› 2015, Vol. 66 ›› Issue (3): 1035-1041.DOI: 10.11949/j.issn.0438-1157.20141122

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Extraction of Sr2+ with thiacalix[4]arene-biscrowns 4 in HNO3 solution

LI Jie1, ZHOU Lijuan1, ZHANG Dongxiang1, LIU Cong1, Tarasov V. V.2   

  1. 1 School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China;
    2 Mendeleev University of Chemical Technology, Moscow 125190, Russia
  • Received:2014-07-25 Revised:2014-12-02 Online:2015-03-05 Published:2015-03-05
  • Supported by:

    supported by the National High Technology Research and Development Program of China (2013AA051401).

硫代杯[4]冠-4在硝酸体系中对Sr2+的萃取

李洁1, 周丽娟1, 张东翔1, 刘聪1, Tarasov V. V.2   

  1. 1 北京理工大学化工与环境学院, 北京 100081;
    2 俄罗斯门捷列夫化工大学, 莫斯科 125190
  • 通讯作者: 张东翔
  • 基金资助:

    国家高技术研究发展计划项目(2013AA051401)。

Abstract:

In the high-level radioactive waste liquid separation process of spent fuel reprocessing, new separation materials are of great significance for the efficient extraction of strontium. In the paper, 1, 2-alternate thiacalix[4]biscrowns 4 (TCACE) was synthesized by using calix[4]arene and triethylene glycol di(p-toluenesulfonate). TCACE was characterized by FT-IR, 1H NMR and MS. The influence of different diluents on extraction rate was studied, and CH2Cl2 was chosen as diluent by optimization. Extraction rate of Sr2+ was excellent and average mass transfer coefficient was 1.36×10-5 m·s-1 under the conditions of CH2Cl2 as organic solvent, nitrate acid concentration was 3 mol·L-1, TCACE concentration was 1×10-3 mol·L-1, Sr2+ concentration was 5×10-4 mol·L-1, extraction was conducted for 80 min and at 25℃. Different technological conditions on extraction for Sr2+ were studied. Furthermore, the extraction measurement equation was also studied. The extraction complex was {Sr(NO3)2}·{TCACE} as shown by experiment. The extraction effects for other metal ions Mo6+, Ni2+, Ag+, Sn4+ with TCACE were also studied. It was found that TCACE showed excellent selectivity for Sr2+.

Key words: thiacalix[4]arene-biscrowns 4, synthesis, Sr2+, extraction, separation

摘要:

乏燃料后处理的高放废液分离过程中,发展新型分离材料实现对锶的高效萃取至关重要。合成了1,2交替构象的硫代杯[4]冠-4(TCACE),利用FT-IR、1H NMR和MS对目标产物进行了表征。研究不同稀释剂对萃取的影响,优化得出CH2Cl2为稀释剂,在硝酸浓度为3 mol·L-1,有机相中硫代杯[4]冠-4浓度为1×10-3 mol·L-1,水相中Sr2+浓度为5×10-4 mol·L-1,萃取温度为25℃,萃取80 min条件下,平均传质系数为1.36×10-5 m·s-1,Sr2+的分配比为0.69。分析了不同条件对硫代杯[4]冠-4对Sr2+的萃取影响,研究了萃取计量方程式,实验结果表明萃合物为{Sr(NO3)2}·{TCACE}。研究了TCACE对其他金属离子Mo6+、Ni2+、Ag+、Sn4+等的萃取效果,表明对Sr2+具有较好的选择性。

关键词: 硫代杯[4]冠-4, 合成, Sr2+, 萃取, 分离

CLC Number: