Sn修饰SBA-15、MCM-41催化剂的制备及顺酐酯化性能

以SBA-15和MCM-41分子筛为载体，负载无水四氯化锡，制备了SnCl4-SBA-15和SnCl4-MCM-41催化剂，考察了不同锡与硅物质的量比对催化顺酐与正丁醇酯化反应的影响。结果表明，SnCl4-SBA-15表现出比SnCl4-MCM-41更高的催化性能，顺酐转化率为99.8%，副产物较少，马来酸二丁酯的产率最高可达91.3%。采用X射线衍射、N₂物理吸附、傅立叶红外光谱和紫外-可见漫反射技术对催化剂进行表征，结果显示， SnCl₄-SBA-15具有较高的比表面积，较大的孔容和孔径，更有利于催化反应的进行。

Preparation and catalytic properties of tin-modified SBA-15 and MCM-41 catalysts for maleic anhydride esterification

Using SBA-15 and MCM-41 molecular sieves as the supports,SnC14-SBA-15 and SnC14-MCM- 41 catalysts were prepared. The influence of different Sn/Si molar ratio on the catalyst performance for the esterification of maleic anhydride with n-butanol was investigated. The results showed that SnC14-SBA-15 catalyst exhibited higher catalytic activity than SnC14-MCM-41 catalyst, and maleic anhydride conversion of 99.8% and the maximum yield of dibutyl maleate of 91.3% with lower byproducts were attained. The catalysts were characterized by XRD, N2-absorption, vr-IR, and DRUV-vis techniques. The characteriza： tion results indicated that SnCI4-SBA-15 catalyst possessed higher surface area, larger pore volume and pore size, which was beneficial to the catalytic reaction.