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

›› 2011, Vol. 19 ›› Issue (1): 140-144.

• PRODUCT ENGINEERING AND CHEMICAL TECHNOLOGY • Previous Articles Next Articles

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

ZHANG Qiaoling, LIU Youzhi, LI Guangming, LI Junping

Research Center of Shanxi Province for High Gravity Engineering and Technology, College of Chemical Engineering and Environment, North University of China, Taiyuan 030051, China

Received:2010-05-19 Revised:2010-11-07 Online:2011-02-28 Published:2011-02-28
Supported by:
Supported by the Science and Technology Key Projects of Shanxi Province(20090321113)

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

张巧玲, 刘有智, 李光明, 李军平

Research Center of Shanxi Province for High Gravity Engineering and Technology, College of Chemical Engineering and Environment, North University of China, Taiyuan 030051, China

通讯作者: LIU Youzhi, E-mail: qlzhang_65@sohu.com
基金资助:
Supported by the Science and Technology Key Projects of Shanxi Province(20090321113)

Abstract

Abstract: 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.

Key words: impinging stream-rotating packed bed, coil pipe, diazonium salt, p-hydroxybenzaldehyde

摘要： 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.

关键词: impinging stream-rotating packed bed, coil pipe, diazonium salt, p-hydroxybenzaldehyde

ZHANG Qiaoling, LIU Youzhi, LI Guangming, LI Junping. Preparation of p-Hydroxybenzaldehyde by Hydrolysis of Diazonium Salts Using Rotating Packed Bed[J]. , 2011, 19(1): 140-144.

张巧玲, 刘有智, 李光明, 李军平. Preparation of p-Hydroxybenzaldehyde by Hydrolysis of Diazonium Salts Using Rotating Packed Bed[J]. , 2011, 19(1): 140-144.

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

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

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