微通道反应器中邻氯甲苯选择性氧化反应的动力学研究

KINETICS OF SELECTIVE OXIDATION OF o-CHLOROTOLUENE TO O-CHLOROBENZALDEHYDE IN A MICROCHANNEL REACTOR

在微通道反应器中,以Co(OAc)_(2)·4H_(2)O/Mn(OAc)_(2)·4H_(2)O/KBr催化体系催化分子氧选择性氧化邻氯甲苯(OCT)合成重要化工中间体邻氯苯甲醛(OCBD),该工艺属绿色、安全工艺。研究了反应过程的动力学,提出了一种选择性氧化OCT的集总动力学方案和动力学模型。通过消除传质和氧气的影响,在动力学控制的条件下获得了一系列动力学数据,并通过Matlab软件将实验数据进行非线性拟合,结果表明基于动力学模型得到的计算值与实验值符合性良好。

The selective oxidation of o-chlorotoluene(OCT)to the important chemical intermediate o-chlorobenzaldehyde(OCBD)by molecular oxygen under the catalytic system of Co(OAc)_(2)·4H_(2)O/Mn(OAc)_(2)·4H_(2)O/KBr in a microchannel reactor is a green and safe process.In order to understand the nature of the process deeply and lay the foundation for process scale-up,the kinetics of the selective oxidation was studied.A lumped kinetic scheme and kinetic model for the selective oxidation of OCT were proposed.By eliminating the influence of mass transfer and oxygen,a series of kinetics data were obtained under the condition of kinetics control,and the experimental data were nonlinear fitted by Matlab software.The results showed that the calculated values on the model were consistent with the experimental data.