Preparation of p-Hydroxybenzaldehyde by Hydrolysis of Diazonium Salts Using Rotating Packed Bed

反应堆的一种新类型，与侵犯旋转溪流的包装的床(IS-RPB ) 和卷管子展示了，被设计并且过去常从重氮基盐由水解作用准备 p-hydroxybenzaldehyde (哲学学士) 。操作参数的影响例如反应温度，反应时间和高严肃因素，在哲学学士的收益上被调查。与传统的水壶类型反应堆相比，有新反应堆的哲学学士的收益显著地被增加，反应时间短得多。在最佳条件下面，哲学学士的收益从 51% ～ 84.1% 被增加。反应堆为用一个连续过程代替传统的批模式操作提供一个机会。

A new type of reactor,featured with impinging stream-rotating packed bed（IS-RPB）and coil pipes,was designed and used to prepare p-hydroxybenzaldehyde（PHB）by hydrolysis from diazonium salts.The influence of operating parameters,such as reaction temperature,reaction time and high gravity factor,on the yield of PHB was investigated.Compared with the traditional kettle-type reactor,the yield of PHB with the new reactor is increased significantly and the reaction time is much shorter.Under the optimum conditions,the yield of PHB is increased from 51%to 84.1%.The reactor offers an opportunity for replacing the traditional batch mode operation with a continuous process.