Cyclohexene epoxidation using molecular oxygen on polyoxometalate hybrid catalysts

被引：0

作者：

Ding Z.-J. ^{[1
,2
]}

Wang Y.-Y. ^{[1
,2
]}

Wang D. ^{[1
,2
]}

Liu S.-S. ^{[1
,2
]}

Jameel U. ^{[1
,2
]}

Zhu M.-Q. ^{[1
,2
]}

机构：

[1] Research Institute of Zhejiang University in Quzhou, Quzhou

[2] College of Chemical and Biological Engineering, Zhejiang University, Hangzhou

来源：

Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2019年 / 33卷 / 05期

关键词：

Catalyst; Cyclohexene; Epoxidation; Nano-gold; Polyoxometalate;

D O I：

10.3969/j.issn.1003-9015.2019.05.010

中图分类号：

学科分类号：

摘要：

Catalytic epoxidation of cyclohexene with molecular oxygen has disadvantages of low conversion and selectivity, and need large amount of solvents. Polyoxometalate hybrid catalysts were prepared with nano-gold and polyoxometalate (POMs) as active centers and ZSM-5 as support. Bi and Co were loaded via formaldehyde, hydrazine hydrate and hydrogen reduction methods, respectively. The effects of different metals, supporting methods and reaction conditions on catalytic epoxidation of cyclohexene under solvent-free conditions were investigated. The results show that Bi supported via formaldehyde reduction method is better than others and the optimum loading content is 0.5%. The catalysts prepared by mixing BMo11 and PMo11 with mass ratio of 1:1 had better catalytic performance (Total POMs loading content w=6.67%). The optimum reaction conditions was: cyclohexene 2.0 g, 3 drops of TBHP (about 0.04 g), 0.02 g catalyst 1%Au-0.5%Bi/PMo11-BMo11/ZSM-5-m (modified), reaction pressure 0.5 MPa, reaction temperature 80 ℃ and reaction time 18 h, and the conversion of cyclohexene was 39.3% and the selectivity of cyclohexene oxide was 40.9%. © 2019, Editorial Board of Journal of Chemical Engineering of Chinese Universities". All right reserved."

引用

页码：1098 / 1106

页数：8

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