醋酸与环己烯酯化合成醋酸环己酯宏观动力学

Macrokinetics for Synthesis of Cyclohexyl Acetate by Esterification of Cyclohexene and Acetic Acid

以磺酸型苯乙烯阳离子交换树脂（D006型）为催化剂,醋酸与环己烯直接加成酯化制备醋酸环己酯。考察了环己烯-醋酸、醋酸环己酯-醋酸2个二组分物系的吸附平衡常数之间的关系。在消除外扩散影响的条件下,研究醋酸与环己烯加成酯化反应的宏观反应动力学,在搅拌转速600 r/min、反应温度343.15~363.15 K、催化剂用量（w）5%~15%的范围内测定了宏观反应动力学数据。采用LHHW动力学模型进行数据回归,得到醋酸与环己烯加成酯化反应的指数前因子和活化能分别为5.33×109 L2/（mol·g·min）和93.06 k J/mol,该酯化反应为放热反应,标准反应焓为-40.51 k J/mol。该模型通过了统计检验,表明模型可靠。

Cyclohexyl acetate was synthesized by the addition esterification of cyclohexene and acetic acid using sulfonic acid type styrene cation exchange resin（D006） catalyst. The adsorption equilibriums of two binary systems,namely cyclohexene-acetic acid and cyclohexyl acetate-acetic acid were investigated,and the macrokinetics of the esterification reaction were studied,in which the influence of the external diffusion was eliminated. The experimental data for the esterification macrokinetics were determined under the conditions of stirring speed of 600 r/min,temperature of 343.15-363.15 K and catalyst dosage of 5%-15%（w）. A LHHW macrokinetics model was established and the model parameters were regressed with the experimental data. The results showed that the pre-exponential factor and the activation energy of the esterification reaction were 5.33×109 L2/（mol·g·min） and 93.06 k J/mol,respectively. The esterification reaction is exothermal reaction and the standard reaction enthalpy is-40.51 k J/mol. Furthermore,the statistical test indicated that the macrokinetics model was reliable.