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研究了氯化四-(对氯苯基)铁卟啉T(p-Cl)PPFeCl催化氧化邻硝基甲苯的表观动力学。在确定邻硝基苯甲醛和邻硝基苯甲酸为主要产物的基础上,建立了连串反应模型和速度方程。根据不同温度条件下所测得的反应速率常数,确立了邻硝基甲苯氧化生成邻硝基苯甲醛的第一步反应为一级反应,且表观活化能为99.5kJ/mol;而邻硝基苯甲醛氧化生成邻硝基苯甲酸的第二步反应为1/2级反应,且表观活化能为82.9kJ/mol。通过比较两步反应的表观活化能和反应速率常数,发现升高温度有利于邻硝基苯甲醛的生成,且反应速率较快。
The apparent kinetics of the catalytic oxidation of o-nitrotoluene with tetrakis (p-chlorophenyl) iron porphyrin T (p-Cl) PPFeCl was studied. Based on the determination of o-nitrobenzaldehyde and o-nitrobenzoic acid as the main products, a series of reaction models and velocity equations were established. According to the reaction rate constant measured under different temperature conditions, the first step reaction of o-nitrotoluene to o-nitrobenzaldehyde was established as the first order reaction, and the apparent activation energy was 99.5 kJ / mol. The second reaction of the oxidation of benzaldehyde to o-nitrobenzoic acid is ½ reaction, and the apparent activation energy is 82.9kJ / mol. By comparing the apparent activation energy and the reaction rate constant of the two-step reaction, it was found that the increase of temperature is in favor of the formation of o-nitrobenzaldehyde and the reaction rate is faster.