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采用水热法合成了Ti-MCM-41分子筛,XRD、FT-IR、ICP-AES以及DRS-UV-Vis表征结果表明几乎所有的Ti均进入具有MCM-41结构的分子筛骨架中。所合成的Ti-MCM-41对环己烯催化环氧化反应具有较优异的催化性能。溶剂种类、Ti-MCM-41催化剂用量、环己烯/H2O2比、反应温度等工艺条件对Ti-MCM-41催化性能的影响考察表明,在催化剂用量23.33g/L、环己烯浓度2.67mol/L、H2O2浓度0.67mol/L、10mL乙腈为溶剂、70℃反应180min条件下,环己烯单程转化率及H2O2有效利用率最高分别可达23.85%和95.04%。
The results of XRD, FT-IR, ICP-AES and DRS-UV-Vis characterization showed that almost all Ti entered into the molecular sieve framework with MCM-41 structure. The synthesized Ti-MCM-41 cyclohexene-catalyzed epoxidation has more excellent catalytic properties. The effects of different kinds of solvents, Ti-MCM-41 catalyst, cyclohexene / H2O2 ratio and reaction temperature on the catalytic performance of Ti-MCM-41 showed that when the catalyst dosage was 23.33g / L and the concentration of cyclohexene was 2.67mol / L, H2O2 concentration 0.67mol / L, 10mL acetonitrile as solvent and the reaction temperature 70 ℃ for 180min, the highest conversion of cyclohexene and the highest utilization rate of H2O2 were 23.85% and 95.04%, respectively.