用共沉淀法制备了SO4 2 -/ZrO2 -Al2 O3 固体超强酸 ,并采用低温陈化和添加稀土La对其制备方法进行改进 .通过样品催化正丁烷异构化反应考察了该固体超强酸中nZr和nAl的最佳配比为 1∶2 .该法制备的样品的IR显示 ,在 1393cm-1处的吸收峰强度较常温陈化样品大大增加 .XRD分析表明 ,低温陈化和加入稀土添加剂的样品在6 5 0℃焙烧温度下 ,出现了亚稳态的ZrO2 四方晶相的晶体是表面酸性和催化活性增加的微观原因 .样品催化合成八乙酸蔗糖酯反应结果同样证明 ,在相同的时间内 ,低温陈化和添加稀土添加剂的样品具有较好的催化活性 The solid superacid SO42- / ZrO2-Al2 O3 was prepared by co-precipitation method, and its preparation method was improved by aging at low temperature and addition of rare earth La. The solid superacid The optimal ratio of nZr to nAl is 1: 2. The IR of the sample prepared by this method shows that the intensity of the absorption peak at 1393cm-1 increases greatly compared with that of the aged sample at room temperature.XRD analysis shows that the low temperature aging and the addition of rare earth The results show that the crystallinity of the metastable ZrO2 tetragonal phase is the micro-reason of the increase of surface acidity and catalytic activity at the calcination temperature of 650 ℃ .The results of the catalytic synthesis of sucrose acetate octaacetate by the sample also prove that in the same Time, low temperature aging and adding rare earth additives sample has good catalytic activity