用阳离子交换树脂催化酯化合成乙酸异丙酯动力学研究

在间歇反应釜中,采用强酸型阳离子交换树脂(Amberlyst 15-Wet)作催化剂,在液-固两相体系中对乙酸异丙酯合成反应过程进行了研究,系统地考察了搅拌速度、催化剂粒径、温度、催化剂浓度、酸醇比对酯化反应速率的影响。同时通过拟均相动力学模型对反应过程进行了模拟,计算得到了相关的动力学参数。计算结果与与实验值吻合良好,能较好地描述乙酸和异丙醇合成乙酸异丙酯的酯化反应过程。

Kinetics of Isopropyl Acetate Synthesis over Cation-exchange Resin Catalyst

The use of strong acid-cation exchange resin(Amberlyst 15-Wet) as a catalyst in the liquid-solid two-phase system for isopropyl acetate synthesis process was studied.The influences of operation parameters on the rate of esterification,such as speed of agitation,catalyst particle sizes,temperature,catalyst concentration,and mole ratio of acetic acid to isopropanol were investigated.Pseudo homogeneous kinetic model was performed to obtain the parameters related to intrinsic kinetics.A good agreement between the model results and the experimental results was obtained.The kinetic model was found to describe the esterification process pretty well.