间二甲苯液相催化氧化动力学研究  

Kinetics of Liquid Phase Catalytic Oxidation of m-Xylene to Isophthalic Acid

作　　者：张永昭[1] 李希[1] 丁干红[1] 成有为[1] 

机构地区：[1]浙江大学材料与化工学院,浙江杭州310027

出　　处：《化学反应工程与工艺》2006年第2期97-102,共6页Chemical Reaction Engineering and Technology

摘　　要：通过对四个不同初始反应物浓度下的实验数据拟合，得到反应动力学模型的动力学参数。利用此模型得到的180℃，185℃，190℃，195℃下的反应速率常数与Arrhenius方程相符合，得到180～195℃反应活化能40～76kJ／mol，其巾间羧基苯甲醛（3-CBA）氧化活化能最高，说明其受温度的影响最大，间甲基苯甲酸（MT）氧化活化能次之。MT氧化为3CBA为反应控制步骤。A kinetics model was proposed to describe catalytic oxidation of MX to isophthalic acid. The model parameters were obtained by fitting of experimental data at four different initial MX concentrations. The reaction rate constants obtained at 180℃, 185℃, 190℃ and 195℃ accorded with Arrhenius equation satisfactorily. The activation energies of four steps ranged from 40kJ/mol to 76kJ/mol. Among them, the activation energy of 3 earboxybenzaldehyde to isophthalie acid step was the highest and that of m-toluie acid to 3-earboxybenzaldehyde was the second highest. Catalytic oxidation of m-toluie acid to 3-carboxybenzaldehyde was the control step of the reaction system.

关 键 词：间二甲苯 本体共聚 催化氧化 动力学 

分 类 号：TQ031.7[化学工程] TQ245.12