甲苯-乙醇烷基化影响因素的考察

Investigation of Factors Affecting Alkylation of Toluene with Ethanol

采用HZSM-5沸石催化剂,在反应温度为340℃、甲苯/乙醇摩尔比为1的条件下,考察了空速、N_2/(甲苯+乙醇)摩尔比对烷基化反应的影响。提出了一种筛选反应条件的优化方法。通过用B、La、P、B-La单双离子改性的ZSM-5沸石催化剂进行甲苯/乙醇烷基化反应,都得到了较理想的反应结果。其中用单一硼离子改性的ZSM-5沸石催化剂,甲苯转化率可达22.90％,对甲乙苯选择性为98％。

The effect on alkylation of WHSV and N_2/ (toluene + ethanol)(tool)with HZSM5 zeolite catalyst at temperature 340℃ and unit toluene/ethanol tool ratio was investigated. A new optimization method of selecting reaction condition was presented. The alkylation of toluene with ethanol on B, La, P, B-La modified ZSM-5 zeolite catalysts gave good results. The conversion of toluene and the selectivity of p-ethyltolnene on boron modified ZSM-5 zeolite catalyst were 22.90% and 98.00% respectively.