带多台侧反应器的间歇反应精馏生产氯化苄非稳态模拟与过程设计  

Unsteady State Simulation and Process Design of a Batch Reactive Distillation Column with Multiple Side Reactors for Benzyl Chloride Production

作　　者：孙玉玉[1] 汤吉海[1] 陈献[1] 崔咪芬[1] 费兆阳[2] 乔旭[2] 

机构地区：[1]南京工业大学化学化工学院,江苏省工业节水减排重点实验室,江苏南京210009 [2]南京工业大学材料化学工程国家重点实验室,江苏南京210009

出　　处：《高校化学工程学报》2015年第2期388-394,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(20176038,61203020);江苏省产学研前瞻性联合研究项目(BY2011105)

摘　　要：建立了带多台侧反应器的间歇反应精馏过程,采用Aspen Plus模拟软件构建该过程的非稳态模拟方法。以甲苯氯化生产氯化苄为对象,研究了侧反应器台数、侧线采出率和采出位置、氯气分配、反应精馏时间及再沸器蒸发量等设计参数对间歇反应精馏过程的影响规律。模拟结果表明反应能力和分离达到最佳匹配的最优设计参数为:精馏塔塔板数8块、侧反应器2台、氯气分配7:3、从第3块塔板侧线采出、采出率85%、再沸器蒸发量25 kmol?h?1。在此结构参数和操作条件下完成50 kmol甲苯氯化所需时间为9 h,甲苯的转化率和氯化苄的选择性均可达到98.0%以上。A batch distillation column coupled with multiple side reactors was established to produce benzyl chloride through toluene chlorination, and its unsteady state process was simulated using Aspen Plus. The influences of reactor number, extraction ratio, extraction position, chlorine distribution, distillation time and boil-up ratio on the performance of batch reactive distillation were investigated. The simulation results indicate that the best match between reaction and separation can be achieved, and the optimal parameters are as follows： column tray 8, side reactor number 2, chlorine distribution 7：3, 85% of the liquid flow extracted from the 3rdstage into the 2nd reactor and boil-up ratio 25 kmol？h？1. Under the optimum conditions, 50 kmol toluene can be converted to benzyl chloride in 9 h with both conversion and selectivity up to 98.0%.

关 键 词：间歇反应精馏 侧反应器 非稳态模拟 过程设计 氯化苄 

分 类 号：TQ021.8[化学工程]