SCI和EI收录∣中国化工学会会刊

›› 2017, Vol. 25 ›› Issue (9): 1176-1181.DOI: 10.1016/j.cjche.2017.03.025

• Separation Science and Engineering • 上一篇    下一篇

Using bipolar membrane electrodialysis to synthesize di-quaternary ammonium hydroxide and optimization design by response surface methodology

Jiangnan Shen, Zhendong Hou, Congjie Gao   

  1. Center for Membrane Separation and Water Science & Technology, Zhejiang University of Technology, Hangzhou 310014, China
  • 收稿日期:2016-12-19 修回日期:2017-03-04 出版日期:2017-09-28 发布日期:2017-10-11
  • 通讯作者: Jiangnan Shen,E-mail:shenjn@zjut.edu.cn

Using bipolar membrane electrodialysis to synthesize di-quaternary ammonium hydroxide and optimization design by response surface methodology

Jiangnan Shen, Zhendong Hou, Congjie Gao   

  1. Center for Membrane Separation and Water Science & Technology, Zhejiang University of Technology, Hangzhou 310014, China
  • Received:2016-12-19 Revised:2017-03-04 Online:2017-09-28 Published:2017-10-11

摘要: Bipolar membrane electrodialysis (BMED) has already been described for the preparation of quaternary ammonium hydroxide. However, compared to quaternary ammonium hydroxide, di-quaternary ammonium hydroxide has raised great interest due to its high thermal stability and good oriented performance. In order to synthesize N,N-hexamethylenebis(trimethyl ammonium hydroxide) (HM(OH)2) by EDBM, experiments designed by response surface methodology were carried out on the basis of single-factor experiments. The factors include current density, feed concentration and flow ratio of each compartment (feed compartment:base compartment:acid compartment:buffer compartment). The relationship between current efficiency and the above-mentioned three factors was quantitatively described by a multivariate regression model. According to the results, the feed concentration was the most significant factor and the optimum conditions were as follows:the current efficiency was up to 76.2% (the hydroxide conversion was over 98.6%), with a current density of 13.15 mA·cm-2, a feed concentration of 0.27 mol·L-1 and a flow ratio of 20 L·h-1:26 L·h-1:20 L·h-1:20 L·h-1 for feed compartment, base compartment, acid compartment, and intermediate compartment, respectively. This study demonstrates the optimized parameters of manufacturing HM(OH)2 by direct splitting its halide for industrial application.

关键词: Di-quaternary ammonium hydroxide, Bipolar membrane electrodialysis, Response surface methodology, N,N-hexamethylenebis(trimethyl ammonium, hydroxide)

Abstract: Bipolar membrane electrodialysis (BMED) has already been described for the preparation of quaternary ammonium hydroxide. However, compared to quaternary ammonium hydroxide, di-quaternary ammonium hydroxide has raised great interest due to its high thermal stability and good oriented performance. In order to synthesize N,N-hexamethylenebis(trimethyl ammonium hydroxide) (HM(OH)2) by EDBM, experiments designed by response surface methodology were carried out on the basis of single-factor experiments. The factors include current density, feed concentration and flow ratio of each compartment (feed compartment:base compartment:acid compartment:buffer compartment). The relationship between current efficiency and the above-mentioned three factors was quantitatively described by a multivariate regression model. According to the results, the feed concentration was the most significant factor and the optimum conditions were as follows:the current efficiency was up to 76.2% (the hydroxide conversion was over 98.6%), with a current density of 13.15 mA·cm-2, a feed concentration of 0.27 mol·L-1 and a flow ratio of 20 L·h-1:26 L·h-1:20 L·h-1:20 L·h-1 for feed compartment, base compartment, acid compartment, and intermediate compartment, respectively. This study demonstrates the optimized parameters of manufacturing HM(OH)2 by direct splitting its halide for industrial application.

Key words: Di-quaternary ammonium hydroxide, Bipolar membrane electrodialysis, Response surface methodology, N,N-hexamethylenebis(trimethyl ammonium, hydroxide)