石油化工2012，Vol.41Issue(7)：770-777,8.
TiO2/SiO2催化碳酸二甲酯与乙酸苯酯酯交换合成碳酸二苯酯
Transesterification of Dimethyl Carbonate and Phenyl Acetate to Diphenyl Carbonate over TiO2/SiO2 Catalysts
王立慧 1杨先贵 2刘吕花 1王公应1
作者信息
- 1. 中国科学院成都有机化学研究所,四川成都610041
- 2. 中国科学院研究生院,北京100049
- 折叠
摘要
Abstract
TiO2/SiO2 catalysts are prepared by an isochoric impregnation method and their activities in the transesterification of dimethyl carbonate(DMC) and phenyl acetate(PA) are examined. The effect of catalyst dosage, TiO2 content in TiO2/SiO2, calcination temperature, reaction temperature, reaction time and mole ratio of DMC to PA on the transesterification and catalyst stability is investigated. Under the optimized conditions: reaction temperature 170 ℃, reaction time 7 h, PA dosage 39.00 g, n(DMC) : n(PA) 1:2, TiO2loading 4%(w), catalyst calcination temperature 550 ℃ and catalyst dosage 1.6 g, the conversion of DMC and the total selectivity to both methyl phenyl carbonate and diphenyl carbonate reach 79.21% and 93.66%, respectively. The catalyst activity quickly falls with the increase of the reused times. The results of FTIR and XRD show that the loss of TiO2 in the catalyst is serious which inactivates the catalyst in the transesterification. A little of water in the reaction system is very disadvantageous to the transesterification.关键词
碳酸二甲酯/乙酸苯酯/碳酸二苯酯/酯交换/二氧化钛/二氧化硅催化剂Key words
dimethyl carbonate/ phenyl acetate/ diphenyl carbonate/ transesterification/ titanium oxide/silica catalyst分类
化学化工引用本文复制引用
王立慧,杨先贵,刘吕花,王公应..TiO2/SiO2催化碳酸二甲酯与乙酸苯酯酯交换合成碳酸二苯酯[J].石油化工,2012,41(7):770-777,8.
