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微通道反应器中苄亚甲基二氯水解制苯甲醛连续流工艺

严生虎1,陈代祥1,沈 卫2,沈介发1,马 兵2,刘建武1,张 跃1   

  1. 1常州大学化工设计研究院,江苏 常州213164;2康宁中国(上海)管理有限公司,上海 200040
  • 出版日期:2013-02-05 发布日期:2013-02-05

Continuous process for the hydrolysis of benzal chloride to benzaldehyde in a micro-channel reactor

YAN Shenghu1,CHEN Daixiang1,SHEN Wei2,SHEN Jiefa1,MA Bing2,LIU Jianwu1,ZHANG Yue1   

  1. 1 Research Institute of Chemical Engineering,Changzhou University,Changzhou 213164,Jiangsu,China; 2 Corning China (Shanghai) Regional Headquarters,Shanghai 200040,China
  • Online:2013-02-05 Published:2013-02-05

摘要: 以苄亚甲基二氯为原料,盐酸为催化剂,在微通道反应器中连续合成了苯甲醛。考察了苄亚甲基二氯水解反应的温度、盐酸催化剂起始浓度、反应物料摩尔比以及停留时间对反应的影响。实验确定了较优的工艺参数组合:在起始浓度为20%(质量分数)的盐酸催化下,水解反应温度为140 ℃,盐酸与苄亚甲基二氯物料摩尔比为15∶1,停留时间为370 s时,苄亚甲基二氯的转化率达到69.2%,GC选择性超过99.9%。与传统生产工艺相比,实现了连续化操作,缩短了反应时间;采用盐酸作催化剂,避免了传统金属催化剂残留对产品的影响。

关键词: 苄亚甲基二氯, 微通道反应器, 苯甲醛, 水解反应

Abstract: With the catalysis of hydrochloric acid,benzaldehyde was continuously synthesized from benzal chloride in a micro-channel reactor. The effects of temperature,catalyst starting concentration,reactant mole ratio,and residence time on the hydrolysis reaction were investigated. At optimized reaction condition i.e.,20% catalyst starting concentration,140 ℃,n(hydrochloric acid)∶n(benzal chloride)=15∶1 and residence time of 370 s,the conversion of hydrolysis of benzal chloride reaches 69.2%,with a benzaldehyde selectivity (GC) beyond 99.9%. Compared to traditional industrial techniques,this makes the process continuously and time effectively. With hydrochloric acid as the catalyst,it avoided the pollution to final product caused by traditional metal catalyst residues.

Key words: benzal chloride, micro-channel reactor, benzaldehyde, hydrolysis

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