Abstract: Supported heteropoly acid PWH/SiO2 was prepared by impregnation. The optimum conditions of preparation （40% loading and calcination temperature of 200℃） were determined by alkylation of toluene with isopropanol，as well as characterization of XRD，FT-IR and N2-adsorption/desorption. The most favorable alkylation reaction conditions were as follows：reaction temperature 200℃，toluene/isopropanol ratio 4∶1，and space velocity 2h?1. Under the optimized conditions，conversion of isopropanol reached 92.94%，and selection of alkylation was 83.89%.

Key words: supported heteropoly acid, impregnation method, toluene, alkylation

摘要： 以等体积浸渍法制备了负载型杂多酸PWH/SiO2催化剂，采用高压流动微反装置研究了其催化甲苯与异丙醇烷基化反应结果的规律，关联表征结果确定制备负载磷钨酸的适宜条件为：负载量40%，焙烧温度200℃。其催化甲苯与异丙醇烷基化反应适宜反应条件是：反应温度为200℃，甲苯与异丙醇的摩尔比为4∶1，体积空速为2h?1，在此条件下，异丙醇的转化率最高达到92.94%，烷基化反应选择性达83.89%。

关键词: 负载型杂多酸, 浸渍法, 甲苯, 烷基化