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。
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 ~C, 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.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2013年第2期299-302,339,共5页
Chemical Industry and Engineering Progress
