高校化学工程学报2011，Vol.25Issue(6)：1026-1032,7.
由苯“一锅法”制备环己醇催化反应研究——ZnSO4对HZSM-5催化环己烯水合反应的影响
Study on the One-pot Catalytic Synthesis of Cyclohexanol from Benzene——Influence of ZnSO4 on the Hydration of Cyclohexene Catalyzed by HZSM-5
摘要
Abstract
One-pot catalytic synthesis of cyclohexanol from benzene was studied, and the influence of compounds involved in benzene selective hydrogenation on the hydration of cyclohexene was investigated. It was found that the ZnSO4 which was used as promoter for increasing cyclohexene selectivity shows great negative impact on the cyclohexene hydration. When ZnSO4 concentration in water is 0.2 mol-L"1, the cyclohexanol yield is only 1.0%. NH3-TPD, Py-IR, FT-IR and XRD were used respectively to investigate the change of HZSM-5, the catalyst for cyclohexene hydration. It could be concluded that the ZnSO4 leads to the dealuminization of HZSM-5 during reaction, which results in the decrease of Al-OH on the surface of HZSM-5. In other words, the amount of BrSnsted acid sites on HZSM-5 decreases, thereby its catalytic performance for cyclohexene hydration decreases. The substitution for ZnSO4 was explored, and it was found that the A12(SO4)3 shows relatively weak effect on HZSM-5. When Al2(SO4)3 concentration is 0.2 mol-L"1, the cyclohexanol yield is 7.0%. Therefore Al2(SO4)3 can be used as the promoter for benzene selective hydrogenation in the one-pot synthesis of cyclohexanol from benzene.关键词
环己醇/一锅法/HZSM-5.ZnSO4/脱铝Key words
cyclohexanol/ one-pot reaction/ HZSM-5/ ZnSO4/ dealuminization分类
化学化工引用本文复制引用
薛伟,王冬冬,李芳,魏珺芳,王延吉..由苯“一锅法”制备环己醇催化反应研究——ZnSO4对HZSM-5催化环己烯水合反应的影响[J].高校化学工程学报,2011,25(6):1026-1032,7.基金项目
973计划前期研究专项(2010CB234602):国家自然科学基金资助项目(20706011,20876033,21176056):河北省自然科学基金资助项目(B2010000023). （2010CB234602）
