对甲酚氧化合成对羟基苯甲醛

研究了对甲酚经空气氧化合成对羟基苯甲醛反应过程。研究发现，在试验条件下对甲酚氧化反应是受氧传质控制的反应。通过使用特制的气体分布器，可以有效地强化传氧速度，提高总反应速度。从拟一级反应模型出发，提出该氧化反应的宏观动力学方程，计算了反应的表观活化能。

Study on Preparation of p Hydroxybenzaldehyde by p Cresol Oxidation

The experimental study on the preparation of p hydroxybenzaldehyde by p cresol oxidation has been carried out in this work.In a 1 liter stirred tank reactor,the experiments were conducted by changing the agitation speed and air flow rate.The results show that the rate of this oxidation reaction significantly depends on the mass transfer rate of oxygen.In order to improve the transfer process,a specially designed porous sparger was installed to generate very small gas bubble in the liquid phase.A simple empirical expression for this oxidation reaction was assumed,and the rate constant as well as the apparent activation energy were calculated from the Arrhenius plot by using the experimental data.