2-丁基-1-正辛醇萃取硼酸的动力学研究  

Kinetics of Extraction of Boric Acid with 2-Butyl-1-n-octanol

作　　者：彭小五 李丽娟[1,2] 时东 张利诚[1,2,3] 李慧芳 宋富根[1,2] 聂锋 姬连敏[1,2] 宋雪雪 曾忠民[1,2] PENG Xiao-wu;LI Li-juan;SHI Dong;ZHANG Li-cheng;LI Hui-fang;SONG Fu-gen;NIE Feng;JI Lian-min;SONG Xue-xue;ZENG Zhong-min(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China;Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources,Xining,810008,China;University of Chinese Academy of Sciences,Beijing,100018,China)

机构地区：[1]中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁810008 [2]青海省盐湖资源开发工程技术研究中心,青海西宁810008 [3]中国科学院大学,北京100049

出　　处：《盐湖研究》2020年第3期79-84,共6页Journal of Salt Lake Research

基　　金：青海省自然科学基金青年项目(2020-ZJ-962Q);青海省重点研发项目(2019-GX-166);中科院国际合作项目(122363KYSB20190033)。

摘　　要：采用恒界面池法研究了2-丁基-1-正辛醇萃取剂萃取硼酸的动力学,考察了相界面面积、搅拌转速、反应物浓度和反应温度等因素对萃取速率的影响。结果表明萃取体系的萃取过程发生在两相界面区域,萃取反应受扩散和化学反应共同控制,主要扩散阻力区集中在水相,2-丁基-1-正辛醇/煤油从卤水中萃取硼酸的动力学速率方程为,其萃取硼酸的表观活化能为19.038 kJ·mol^-1。The kinetics of extraction of boric acid by 2-butyl-1-n-octanol extractant was investigated by constant interface cell method.The effects of interface area,stirring speed,reactant concentration and reaction temperature on the extraction rate were investigated.The results showed that the extraction process of the extraction system occurred in the two-phase interface regions,and the extraction reaction was controlled by diffusion and chemical reaction.The main diffusion resistance zone was located in the water phase.The kinetic rate equation for the extraction of boric acid by 2-butyl-1-n-octanol/kerosene was established as R=7.231×10^-3[H 3BO 3][R(OH)]2,and the apparent activation energy of the systems was 19.038 kJ·mol^-1.

关 键 词：萃取动力学 硼酸 2-丁基-1-正辛醇 恒界面池法 

分 类 号：O613.8[理学—无机化学]