MgSO_4/离子交换树脂催化合成醋酸正丁酯动力学  

Kinetics of Butyl Acetate Synthesis with MgSO_4 Modified Ion Exchange Resins

作　　者：任晓乾[1] 刘艳秋[1] 梁金花[2] 陈刘龙 孙守飞[1] 姜岷[2] 

机构地区：[1]南京工业大学化学化工学院 [2]南京工业大学生物与制药工程学院,江苏南京210009

出　　处：《高校化学工程学报》2014年第2期252-257,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：材料化学工程重点实验室开放项目;国家重点基础研究规划(973项目;2009CB724701)

摘　　要：在间歇釜式反应器中研究了用负载MgSO4改性强酸性大孔离子交换树脂来催化合成醋酸丁酯。在消除内外扩散的条件下,测定了催化剂用量和反应温度对反应体系中醋酸浓度随时间的变化的影响。在催化剂用量与反应物总质量比为0.005-0.04,温度为353.2-373.2 K和常压下,建立了可逆二级反应动力学方程,用初始速率法回归出催化剂用量的影响函数·（x）,确定了指前因子k0为5.84×1010 L·（mol·min）-1,活化能Ea为87409.57 J·mol-1,温度对平衡常数影响不大,平衡常数为3.86。在实验范围内对获得的动力学方程进行了验证,计算值与实验值符合良好。The reaction kinetics of the liquid phase synthesis of butyl acetate with MgSO4 modified strong-acidcationic-exchange resins as catalyst was investigated in a stirred batch reactor. Without internal and externaldiffusion, the influence of catalyst dosage and reaction temperature on the concentration change of acetic acidwith reaction time was determined. The reaction condition is： mass fraction of catalyst to the total reactant0.005-0.04, temperature 353.2-373.2 K, and pressure 101.3 kPa, and the parameters of the kinectic model for thereversible second-order reaction were obtained. The catalyst dosage influence was evaluated by the initial reactionrate method. The frequency factor is 5.84 · 10^101· L.（mol.min）-1 and the activation energy is 87409.57 J.mo1-1. Theaccuracy of the reaction kinetic equation was testified under the above experimental conditions and the resultshows that the calculated values are consistent with experimental values.

关 键 词：离子交换树脂 醋酸正丁酯 硫酸镁 反应动力学 

分 类 号：TQ225.24[化学工程—有机化工]