Kinetic study of transesterification of methyl acetate with ethanol catalyzed by 4-(3-methyl-1-imidazolio)-1-butanesulfonic acid triflate

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• 作者：Yanmei Peng ; Xianbao Cui ; Ying Zhang ; Tianyang Feng ; Zheng Tian ; Lexing Xue
• 关键词：Transesterification ; Reaction kinetics ; Ionic liquid catalyst ; Ethyl acetate ; UNIQUAC
• 刊名：Applied Catalysis A: General
• 出版年：2013
• 出版时间：10 September, 2013
• 年：2013
• 卷：466
• 期：Complete
• 页码：131-136
• 全文大小：591 K

文摘

The chemical equilibrium and reaction kinetics for transesterification of methyl acetate with ethanol to form ethyl acetate and methanol catalyzed by an ionic liquid 4-(3-methyl-1-imidazolio)-1-butanesulfonic acid triflate ([HSO₃-bmim]CF₃SO₃) were studied. The reaction enthalpy was obtained experimentally and theoretically. The effects of temperature, initial molar ratio of ethanol to methyl acetate and catalyst concentrations to the reaction rate were investigated. The reaction mechanism of transesterification catalyzed by ionic liquids is proposed. Based on the reaction mechanism, an ideal-solution model (IM) and a non-ideal-solution model (NIM) were used to correlate the reaction kinetics data. The NIM was more reliable to describe the reaction kinetics. Compared with sulfuric acid, the ionic liquid catalyst was more active.