Dowex 50Wx8-catalyzed reactions occurring in systems containing acetic acid, benzyl alcohol, benzyl acetate, and water were studied over a range of catalyst loadings, temperatures, and feed compositions. The initial esterification rate is found to depend on these reaction conditions. The presence of water rather than ester in the feed is found to exert a more adverse effect on the esterification rate. Water is found to swell the resin significantly more than the other three components present in the system. The swelling and adsorption data indicate that adsorption behavior over Dowex 50Wx8 is complex. Although, the Langmuir−Hinshelwood (LH) model can successfully predict the esterification kinetics, it cannot validate the hydrolysis data. A new form of modified LH model indirectly accounting for changes occurring in the resin phase-component activities during the course of the reaction is presented. This is capable of predicting esterification and hydrolysis kinetics as well as the equilibrium behavior.

中文翻译：

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Dowex 50 Wx8催化乙酸苄酯酯化和水解的动力学研究

研究了在含有乙酸，苯甲醇，乙酸苄酯和水的系统中发生的Dowex 50Wx8催化反应，这些反应是在一定的催化剂负载量，温度和进料组成范围内进行的。发现初始酯化速率取决于这些反应条件。发现进料中存在水而不是酯对酯化速率产生更不利的影响。发现水比系统中存在的其他三种组分明显更多地溶胀树脂。溶胀和吸附数据表明在Dowex 50Wx8上的吸附行为很复杂。尽管Langmuir-Hinshelwood（LH）模型可以成功预测酯化动力学，但无法验证水解数据。提出了一种新形式的改进的LH模型，该模型间接考虑了反应过程中树脂相组分活性中发生的变化。这能够预测酯化和水解动力学以及平衡行为。