为实现甲苯的低温烷基化反应，提高乙苯产率，利用超声空化强化甲苯烷基化反应。首先以单因素实验为基础，考察了甲苯体积分数、乙醇质量分数对产物分布的影响，并结合空化产物的分析对反应历程进行了推导；通过响应面法与单因素实验考察甲苯烷基化生成乙苯的最佳工艺条件为：甲苯质量分数为20%、超声功率为850 W、超声时间为90 min、pH为6。最佳工艺条件下，乙苯最佳产率为34%。

Toluene alkylation can be enhanced through ultrasonic cavitation to increase the yield of ethyl benzene under lower temperature.Based on single factor experiment,the impacts of the volumetric fraction of toluene and the mass fraction of ethanol on product distribution are investigated.Combined with analysis on cavitation products,the reaction process is deduced.Response surface method is utilized to obtain the optimal process conditions for the synthesis of ethyl benzene from toluene alkylation as follows:the mass fraction of toluene is 20%,ultrasonic power is 850 W,and the ultrasonic time is 90 min.The optimal yield of ethyl benzene reaches 29.54% under the optimal conditions.

魏威(1995-),男,本科,研究方向为过程强化,1648182708@qq.com