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.
出处
《化学反应工程与工艺》
EI
CAS
CSCD
北大核心
2006年第2期97-102,共6页
Chemical Reaction Engineering and Technology
关键词
间二甲苯
本体共聚
催化氧化
动力学
m-xylene
isophthalic acid
catalytic oxidation
kinetics
