کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
68288 | 48510 | 2008 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Epoxidation of styrene to styrene oxide using carbon dioxide and hydrogen peroxide in ionic liquids Epoxidation of styrene to styrene oxide using carbon dioxide and hydrogen peroxide in ionic liquids](/preview/png/68288.png)
The epoxidation of styrene using hydrogen peroxide and compressed CO2 was conducted in 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]), 1-butyl-3-methylimidazolium hexafluoroborate ([bmim][PF6]), 1-butyl-3-methylimidazolium chloride ([bmim]Cl), 1,1,3,3-tetramethylguanidinium lactate [TMG][Lac], 1,1,3,3-tetramethylguanidinium trifluoroacetate [TMG][CF3COO], ethanol, and acetonitrile. It was demonstrated that the reaction could be carried out effectively in [bmim][BF4] or [bmim]Cl without any metallic catalysts. HCO4− produced from CO2 and H2O2 acted as the catalyst. The conversion of styrene and the yield of styrene oxide could reach 95% and 69%, respectively.
Epoxidation of styrene to styrene oxide using carbon dioxide and hydrogen peroxide in ionic liquids was studied. The various reaction parameters in the epoxidation of styrene were investigated. The pressure of CO2, equivalents of KOH and H2O2, reaction time and different ionic liquids had influence on the conversion of styrene and the yield of styrene oxide. Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Catalysis A: Chemical - Volume 279, Issue 2, 18 January 2008, Pages 235–238