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
马淑清 1李昌文 2王琪慧 1陈雪琳 1秦亚茹 1石成龙1
作者信息
- 1. 青海民族大学化学化工学院,西宁 810007
- 2. 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
- 折叠
摘要
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.
Abstract
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.
关键词
双咪唑离子液体/恒界面池法/动力学/锂Key words
Diimidazole ionic liquid/Constant interface cell method/Kinetics/Lithium引用本文复制引用
基金项目
青海省自然科学基金(2020-ZJ-953Q)
青海民族大学校级规划项目(2022GH12)
出版年
2024
NETL
NSTL
维普
万方数据