膜科学与技术

双极膜电渗析应用于制备Et4NBF4的研究

作者：唐聪，吕雅月，苗孟杰，吴思梵，阮慧敏，沈江南

单位：浙江工业大学化工学院，杭州 310014

关键词：双极膜电渗析；四乙基四氟硼酸铵；四乙基氢氧化铵

出版年,卷(期):页码： 2021,41(5):97-104

摘要：

本实验利用双极膜电渗析技术（BMED）辅助制备四乙基四氟硼酸铵（Et4NBF4）：以Et4NCl为原料，利用双极膜电渗析将其原位转化为四乙基氢氧化铵（Et4NOH），后加入HBF4中和生成Et4NBF4。实验主要探究了阳离子交换膜种类、料液浓度、电流密度等实验条件对BMED膜堆性能的影响。结果表明：在BMED膜堆进料浓度为0.4mol/L以及电流密度为12mA?cm-2的最佳实验条件下，Et4NCl的转化率可达到97%以上，电流效率达到96%，而能耗仅为0.77kWh?kg-1Et4NOH，最终得到的Et4NOH产品中Cl-含量均低于300ppm。

In this experiment, bipolar membrane electrodialysis technology (BMED) was used to assist the preparation of tetraethyltetrafluoroborate (Et4NBF4): Et4NCl was used as raw material, and it was in situ converted into tetraethylammonium hydroxide (Et4NOH) by bipolar membrane electrodialysis, and then HBF4 was added to neutralize and generate Et4NBF4. The experiment mainly explores the influence of experimental conditions such as cation exchange membrane type, material liquid concentration and current density on the performance of BMED membrane reactor. The results showed that under the optimal experimental conditions of BMED membrane heap feed concentration of 0.4mol/L and current density of 12mA·cm-2, the conversion rate of Et4NCl reached more than 97%, the current efficiency reached 96%, and the energy consumption was only 0.77kWh·kg-1 Et4NOH, the resulting Et4NOH product Cl- content was less than 300ppm.

唐聪（1995-07-26），男，湖北武汉，硕士研究生，海洋化学与化工，E-mail：1244368673@qq.co

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