Kinetics of the transesterification of methyl methacrylate and <em>n</em>-butanol with tetrabutyl titanate as catalyst

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Abstract Due to the problems such as the equipment corrosion and environmental pollution, the production process of butyl methacrylate is gradually replaced with the more environment-friendly transesterification process. In this paper, the reaction and mechanism of the synthesis of butyl methacrylate by transesterification of methyl methacrylate and n-butanol with tetrabutyl titanate as catalyst were initially investigated. Based on the Lewis acid catalysis theory, the mechanism of the reaction was proposed through the reasonable assumptions and simplifications, and the kinetic models based on idea solutions(IS) and non-ideal solutions(NIS) were established, respectively. Through the transesterification experiments, the effects of factors such as reaction temperature, initial molar ratio of reactants and the catalyst amount on the reaction rate were studied, and the model parameters of the kinetic model and the thermodynamic data were obtained from the regression of the experimental data. The results show that the transesterification reaction is an endothermic reversible reaction, the standard molar reaction enthalpy is 14.406 kJ·mol^-1, and the activation energies of the forward and reverse reactions are 70.2 and 51.1 kJ·mol^-1, respectively. The comparison between the calculated values and the experimental data demonstrates that the derived kinetic model is highly reliable and will provide some theoretical guidance for the synthesis of butyl methacrylate by transesterification of methyl methacrylate and n-butanol with tetrabutyl titanate catalyst.

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	PENG Shiren
	WANG Yan
	CAI Wangfeng

Keywords： transesterification reaction methyl methacrylate reaction kinetics butyl methacrylate 1-butanol tetrabutyl titanate

Received 2022-01-24;

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PENG Shiren, WANG Yan, CAI Wangfeng.Kinetics of the transesterification of methyl methacrylate and n-butanol with tetrabutyl titanate as catalyst[J] Chemcial Industry and Engineering, 2024,V41(1): 1-11

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