以硅溶胶和三氯化钛为原料合成Ti-MCM-41分子筛 Ⅲ.Ti-MCM-41分子筛的催化活性  

Synthesis of Ti-MCM-41 Using Colloidal Silica and Titanium Trichloride Ⅲ. Catalytic Activity of Ti-MCM-41 Molecular Sieve

作　　者：于健强[1] 李灿[1] 许磊[2] 李美俊[1] 辛勤[1] 刘中民[2] 

机构地区：[1]中国科学院大连化学物理研究所催化基础国家重点实验室,大连116023 [2]中国科学院大连化学物理研究所,大连116023

出　　处：《催化学报》2001年第4期335-338,共4页

摘　　要：考察了以硅溶胶和TiCl3水溶液为原料合成的含钛中孔分子筛Ti MCM 4 1对苯乙烯 ,α 甲基苯乙烯和环己烯氧化反应的催化性能 .结果表明 ,对于CC双键位于端部的苯乙烯和α 甲基苯乙烯 ,发生的主要反应是CC双键的氧化断裂 ,而对于CC双键位于中间的环己烯 ,发生的主要反应是环氧化反应 .The catalytic properties of the Ti-MCM-41 molecular sieve synthesized from colloidal silica and TiCl 3 were tested in the epoxidation of styrene, α-methyl styrene and cyclohexene using 30%H 2O 2 solution as the oxidant. The catalysts show excellent catalytic properties and the substrate conversion and the product selectivity are comparable with those in the case of Ti-MCM-41 synthesized from organic precursors. The results obtained from the three olefins with different structure indicate that the main procedure of the oxidation of olefins with terminal CC bond is the oxidative cleavage, while that of cyclohexene is the epoxidation.

关 键 词：中孔分子筛 TI-MCM-41 苯乙烯 Α-甲基苯乙烯 环乙烯 选择氧化 环氧化 催化活性 硅溶胶 三氯化钛 合成 含钛分子筛 

分 类 号：O643.3[理学—物理化学]