用水蒸汽热处理和酸洗交替进行的方法,将氢型丝光沸石脱铝,用脉冲色谱法对所得样品进行催化性质的研究。结果显示出,样品的活性中心数目随硅铝比的改变而发生变化,异丙苯裂解和二甲苯异构化反应的催化活性也发生变化。我们认为脱铝丝光沸石催化性质的改变,主要是由于在脱铝过程中,晶体结构发生改变所致。 Hydrogen-type mordenite was dealuminated by a steam heat treatment and pickling, and the resulting samples were investigated for their catalytic properties by pulse chromatography. The results showed that the number of active centers of the samples changed with the change of Si / Al ratio, and the catalytic activity of cumene cracking and xylene isomerization also changed. We believe that the change of the catalytic properties of dealuminated mordenite is mainly due to the change of the crystal structure during the dealumination.