有机杂化介孔 Beta 分子筛的合成及在苯甲醇烷基化反应中的应用

Through the dual strategy by introducing a hierarchical pore structure and an organic hybrid modification in zeolites，an existing problem of low catalytic selectivity，caused by quantities of side reaction of benzyl alcohol self-etherification in micropores，and the low catalytic activity in the alkylation reaction of benzyl alcohol and mesitylene has been solved. We developed an organic hybrid mesoporous Beta zeolite with high activity and high selectivity to alkylation products，which has greatly increased the number of accessible active centers on external specific surface，effectively reduced the self-etherification side reaction of benzyl alcohol in micropores，and immensely improved its alkylation catalytic activity and selectivity to alkylation product in the reaction of benzyl alcohol and trimethylbenzene. Eventually，we realized the increasing conversion of benzyl alcohol from 66.8% to 99.7% and the increasing selectivity to 2-benzyl-1，3，5-triethyl benzene from 14.8% to 50.7%. This work will provide a new thinking of the development of catalysts with high activity and selectivity in Friedel-Crafts alkylation.