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
收藏
页码：5478 / 5484
页数：7
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