首页|双咪唑离子液体体系从盐湖卤水中萃取锂的动力学研究

双咪唑离子液体体系从盐湖卤水中萃取锂的动力学研究

Study on Kinetics of Extraction of Lithium from Salt Lake Brine by Diimidazole Ionic Liquid System

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文章采用恒界面池法研究TBP-[C4(mim)2][FeCl4]-MIBK体系从溶液中萃取锂的动力学过程.考察了搅拌速率、恒界面面积、温度、[C4(mim)2][FeCl4]浓度、TBP浓度等因素对萃取速率的影响.实验结果表明,双咪唑离子液体体系萃取锂的反应主要发生在两相界面区域.萃取反应的表观活化能为Ea=13.671 kJ/mol,萃取反应受扩散控制.TBP-[C4(mim)2][FeCl4]-MIBK体系萃取锂的动力学方程为:RLi=1.291×10-2[Li+]0.995[TBP]2.051[C4(mim)2·FeCl4-]0.937.
In this paper,the kinetic process of lithium extraction from solution by TBP-[C4(mim)2][FeCl4]-MIBK system was studied by constant interface cell method.The effects of stirring rate,constant interface area,temperature,[C4(mim)2][FeCl4]concentration and TBP volume fraction on the extraction rate were investigated.The experimental results showed that the extraction reaction of lithium by diimidazole ionic liquid system mainly occurred in the two-phase interface region.The apparent activation energy of the extraction reaction was Ea=13.671 kJ/mol and the extraction reaction was controlled by diffusion.The kinetic equation of lithium extraction by TBP-[C4(mim)2][FeCl4]-MIBK system was RLi=1.291×10-2[Li+]0.995[TBP]2.051[C4(mim)2·FeCl4-]0.937.

Diimidazole ionic liquidConstant interface cell methodKineticsLithium

马淑清、李昌文、王琪慧、陈雪琳、秦亚茹、石成龙

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青海民族大学化学化工学院,西宁 810007

中国科学院青海盐湖研究所,西宁 810008

双咪唑离子液体 恒界面池法 动力学 锂

青海省自然科学基金青海民族大学校级规划项目

2020-ZJ-953Q2022GH12

2024

青海科技
青海省科学技术厅

青海科技

影响因子：0.052
ISSN：1005-9393
年,卷(期)：2024.31(1)
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