关键词:

阳离子交换树脂, 醋酸甲酯, 水解, 反应动力学模型, 模拟与优化

Abstract: The hydrolytic kinetics experiments for methyl acetate with 001×7(732) cationexchange resin were carried out in a batch fullystirred reactor in the ranges of 40—55℃ of reaction temperature, 100—600 g·L^-1 of catalyst concentration and 0.5∶1—9.0∶1 of molar ratio of water to MeOAc, while the effect of resin particle size was neglectedBased on some experimental phenomena and absorption characteristics of some components on catalytic sites in the process of hydrolysis reaction, one pseudohomogeneous and two heterogeneous hydrolytic kinetic models were established, and the parameters were estimated based on experimental dataAn optimal heterogeneous hydrolytic kinetic model, which showed good agreement with the experimental data, was obtainedThe optimal model was based on the proposed mechanism that both methyl acetate and water were absorbed on catalytic sites and the surface reaction was the ratecontrolling stepSome operational parameters of methyl acetate catalytic hydrolysis with 001×7(732) cationexchange resin were optimized through the simulation calculations based on this modelThe obtained optimal values were as follows: 55℃ of reaction temperature, 260 g·L^-1 of catalyst concentration and 1.5∶1 of molar ratio of water to MeOAcUnder the conditions of the optimized operation parameters, the hydrolytic conversion of methyl acetate reached 348% close to the equilibrium
hydrolytic conversion after 90 min of the hydrolysis reaction.
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Key words:

阳离子交换树脂, 醋酸甲酯, 水解, 反应动力学模型, 模拟与优化