中文摘要：

采用浸渍法对HY／SBA-15微孔介孔复合分子筛进行Ce改性，制备了催化剂Ce—HY／SBA-15。X射线衍射和高倍透射电镜的表征结果表明，Ce改性后的催化剂保持了HY／SBA-15微孔、介孔结构，Ce离子均匀地分散在分子筛的孔道里，没有出现团聚；Py—FFIR和NH3-TPD的表征结果表明，Ce的负载使羟基表现出更强的B酸强度。以Ce—HY／SBA-15为催化剂催化合成乙酸正丁酯，通过实验确定了较佳的制备条件：反应时间为2．0h、酸醇物质的量比为1：1．2、催化剂质量分数为10％时酯化率最高，并考察了三种分子筛催化剂的重复使用性能，结果证明了Ce的负载和HY的结构有利于提高催化剂的酸催化活性。

英文摘要：

Ce-HY/SBA-15 catalyst was prepared by the impregnation method, the Ce was loaded on the HY/SBA-15 mi- croporous mesoporous composite molecular sieve. The results of X ray diffraction and HTEM show that the Ce-modified molec- ular sieve maintained microporous and mesoporous structures of HY/SBA-15, while Ce ions were homogeneously dispersed in the molecular sieve pores with no agglomeration. The results of Py-FTIR and NH3-TPD show that the B acid strength of hydroxyl was stronger for the introduction of Ce. N-butyl acetate was synthetized by using Ce-HY/SBA-15 as catalyst, the suitable conditions were determined by experiment, the esterification rate is the highest when the reaction time is 2.0 h, the mole ratio of alcohol to acid is 1 ： 1.2 ,and the mass fraction of catalyst is 10%. The esterification results illustrate that the structure of Ce loaded and HY could enhance the acid catalytic activity of the catalyst.