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Study on the preparation of Et4NBF4 by bipolar membrane electrodialysis

Authors： TANG Cong, LV Yayue, MIAO Mengjie, WU Sifan, RUAN Huimin, SHEN Jiangnan

Units： College of Chemical Engineering, Zhejiang University of Technology

KeyWords： Bipolar membrane electrodialysis; Tetraethylammonium tetrafluoroborate; Tetraethylammonium hydroxide

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2021,41(5):97-104

Abstract：

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.

Funds：

国家自然科学基金项目(21676249，21878273)

AuthorIntro：

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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