本文研究了 ZSM-5沸石分子筛催化剂的不同改性方法.并发现了一种新的改性方法,通过此法改性所制得的催化剂具有较高的催化活性和对二甲苯选择性.在温度范围为723～823 K,空速范围为6～14 h~(-1)条件下,研究了该催化剂的甲苯甲醇烷基化性能.结果表明:在实验条件下,CZSM-5具有很好的催化性能.当反应温度为773 K,空速为6 h~(-1)时,甲苯转化率为30.1%,对二甲苯选择性为94.3%. In this paper, different modification methods of zeolite ZSM-5 zeolite catalysts were studied, and a new modification method was found. The catalyst prepared by this method has higher catalytic activity and selectivity to para-xylene. The results showed that under the experimental conditions, CZSM-5 had a good performance in the alkylation of toluene with methanol at a temperature of 723-823 K and a space velocity of 6-14 h ~ (-1) When the reaction temperature is 773 K and the space velocity is 6 h ~ (-1), the conversion of toluene is 30.1% and the selectivity to p-xylene is 94.3%.