CAJ | 학술논문

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 均进入到具有 MCM-41结构的分子筛骨架.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23.33 g/L、环己烯浓度2.67 mol/L、H2O2浓度0.67 mol/L、10 mL 乙腈为溶剂、70oC 反应180 min 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%.
채용수열법합성료 Ti-MCM-41분자사,XRD、FT-IR、ICP-AES 이급 DRS-UV-Vis 표정결과표명궤호소유적 Ti 균진입도구유 MCM-41결구적분자사골가.소합성적 Ti-MCM-41대배기희최화배양화반응구유교우이적최화성능.용제충류、Ti-MCM-41최화제용량、배기희/H2O2비、반응온도등공예조건대 Ti-MCM-41최화성능적영향고찰표명,재최화제용량23.33 g/L、배기희농도2.67 mol/L、H2O2농도0.67 mol/L、10 mL 을정위용제、70oC 반응180 min 조건하,배기희단정전화솔급 H2O2유효이용솔최고분별가체23.85%화95.04%.
Ti-MCM-41 was synthesized by hydrothermal method and characterized by XRD, FT-IR, ICP-AES and DRS-UV-Vis techniques. The results indicated that the obtained samples exhibited a prefect MCM-41 structure and almost all of Ti atoms were incorporated into the framework of Ti-MCM-41, which gave an excellent catalytic performance in cyclohexene epoxidation with H2O2. The investigation of the effects of solvent types, Ti-MCM-41 amount, cyclohexene/H2O2 ratio and reaction temperature on the catalytic property of the as-prepared sample indicated that the cyclohexene conversion and H2O2 utilization could reach up to 23.85% and 95.04%, respectively under the conditions of catalyst amount being 23.33 g/L, cyclohexene and H2O2 amount being 2.67 mol/L and 0.67 mol/L, and acetonitrile as solvent and reaction at 70 oC for 180 min,.