Control of Competing Hydrogenation of Phenylhydroxylamine to Aniline in a Single-Step Hydrogenation of Nitrobenzene to p-Aminophenol

被引：33

作者：

Nadgeri, Jayprakash M. ^{[1
]}

Biradar, Narayan S. ^{[1
]}

Patil, Priyanka B. ^{[1
]}

Jadkar, Sachin T. ^{[1
]}

Garade, Ajit C. ^{[1
]}

Rode, Chandrashekhar V. ^{[1
]}

机构：

[1] Natl Chem Lab, Chem Engn & Proc Dev Div, Pune 411008, Maharashtra, India

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2011年 / 50卷 / 09期

关键词：

PLATINUM CATALYSTS; CARBON; SUPPORT; OXYGEN;

D O I：

10.1021/ie102544a

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Two steps involving catalytic hydrogenation of nitrobenzene to phenylhydroxylamine (PHA) in acid medium and its rearrangement to p-aminophenol (PAP) were studied separately in a batch reactor, using a well-characterized 3% Pt/C catalyst. The first step of hydrogenation of nitrobenzene to PHA could be carried out at 303 K and a H(2) pressure of 0.69 MPa with complete conversion of nitrobenzene, while the achieved selectivity to PHA was higher than 90% with some formation of aniline, even at lower temperature. The second step of PHA rearrangement to PAP could be achieved under a hydrogen atmosphere at elevated temperature of 353 K to give a maximum selectivity to PAP of 74%.

引用

页码：5478 / 5484

页数：7

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