硫代杯[4]冠-4在硝酸体系中对Sr2+的萃取

doi:10.11949/j.issn.0438-1157.20141122

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

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 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

收稿日期:2014-07-25 修回日期:2014-12-02 出版日期:2015-03-05 发布日期:2015-03-05
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)。

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 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).

摘要/Abstract

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

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

中图分类号:

O625

李洁, 周丽娟, 张东翔, 刘聪, Tarasov V. V.. 硫代杯[4]冠-4在硝酸体系中对Sr²⁺的萃取[J]. 化工学报, 2015, 66(3): 1035-1041.

LI Jie, ZHOU Lijuan, ZHANG Dongxiang, LIU Cong, Tarasov V. V.. Extraction of Sr²⁺ with thiacalix[4]arene-biscrowns 4 in HNO₃ solution[J]. CIESC Journal, 2015, 66(3): 1035-1041.

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硫代杯[4]冠-4在硝酸体系中对Sr²⁺的萃取

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

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