高校化学工程学报2012，Vol.26Issue(4)：629-634,6.
改性聚苯乙烯-二乙烯苯纤维固载过氧磷钨酸催化剂的制备及其催化环己烯环氧化反应的研究
Preparation of Catalyst Consisting of Peroxide Phosphotungstic Acid Supported on Modified Polystrene-Divinylbenzene Fiber and its Catalytic Performance when Used in Epoxidation of Cyclohexene
韩瑞峥 1石晓华 1任红海 1蒋登高1
作者信息
- 1. 郑州大学化工与能源学院,河南郑州450001
- 折叠
摘要
Abstract
A new type of supported catalyst, {PO4[WO(O2)2]4}37PSN, was synthesized by loading the peroxide phosphotungstic acid on the modified polystyrene-divinylbenzene fiber. The structures of the synthesized catalysts were characterized by FT-IR, DTA-TG, BET-BJH, respectively, and the amounts of nitrogen, phosphorus, tungsten were determined by EDS (Energy Dispersive Spectrum). The catalyst prepared was used in the epoxidation of cyciohexene with hydrogen peroxide as the oxidant. The important reaction conditions, such as the amounts of catalyst and additive catalyst used, reaction time and reaction temperature, were examined. The experimental results show that the catalyst reveals relatively high catalytic performance with 88% conversion for cyclohexene and 96.5% selectivity for cyclohexene oxide under the suitable conditions as follows: ?cyclohexene):?hydrogen peroxide)=1.75:l, /w(catalyst):w(total reactants)=l:20, m(additive):w(catalyst)=l:10, the reaction temperature of 60 "C and the reaction time of 5 h. In addition, the catalyst used repeatedly for 10 times can still possess both its
high catalytic activity and selectivity.关键词
杂多酸/固载型催化剂/催化氧化/环氧环己烷Key words
heteropolyacid/ supported catalyst/ catalytic oxidation/ cyclohexane oxide分类
化学化工引用本文复制引用
韩瑞峥,石晓华,任红海,蒋登高..改性聚苯乙烯-二乙烯苯纤维固载过氧磷钨酸催化剂的制备及其催化环己烯环氧化反应的研究[J].高校化学工程学报,2012,26(4):629-634,6.
