Hydrogenation of nitrobenzene to p-aminophenol in a four-phase reactor:: reaction kinetics and mass transfer effects

被引：173

作者：

Rode, CV ^{[1
]}

Vaidya, MJ ^{[1
]}

Jaganathan, R ^{[1
]}

Chaudhari, RV ^{[1
]}

机构：

[1] Natl Chem Lab, Homogenous Catalysis Div, Poona 411008, Maharashtra, India

来源：

CHEMICAL ENGINEERING SCIENCE | 2001年 / 56卷 / 04期

关键词：

catalytic hydrogenation; p-aminophenol; kinetics; mass transfer; four-phase system; reaction engineering;

D O I：

10.1016/S0009-2509(00)00352-3

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The kinetics of catalytic hydrogenation of nitrobenzene in acid medium to p-aminophenol was investigated in a batch slurry reactor in a temperature range of 323-353 It. Aniline was formed as a byproduct (upto 20%). The initial rate data were analyzed to assess the mass transfer effects and it was found that gas-liquid mass transfer resistance was important under certain reaction conditions. A Langmuir-Hinshelwood type rate model has been proposed based on the initial rate data in the kinetic regime and considering the reaction taking place in both organic as well as aqueous phase. Since this was a four-phase system, the rate equation was suitably modified to include gas-liquid and liquid-liquid mass transfer steps. The kinetic parameters evaluated from a semibatch reactor model were found to represent the observed experimental data very well indicating the applicability of the proposed rate model. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1299 / 1304

页数：6

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