Authors:
Jianfei DingCollege of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224051, Jiangsu, People's Republic of China

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Ligen ChenCollege of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224051, Jiangsu, People's Republic of China

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Rong ShaoCollege of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224051, Jiangsu, People's Republic of China

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Jun WuCollege of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224051, Jiangsu, People's Republic of China

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Wantian DongShanghai Fine Chemical Co., Ltd, Shanghai 201505, People's Republic of China
China Research Institute of Daily Chemical Industry, Taiyuan 030001, Shanxi, People's Republic of China

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Abstract

The catalytic hydrogenation of p-nitrophenol to produce p-aminophenol (PAP) was carried out over the catalyst nickel supported on active carbon (AC). The calcination temperature was one of the most important technical conditions: temperature higher than 450 °C would result in the reduction of NiO to Ni phase by AC and the loss of support. The surface area and nickel dispersion over catalyst decreased obviously after 450 °C calcination temperature because of the loss of support and the Ni phase sintering. Addition of K2O enhanced the alkalinity of the Ni/AC catalyst, and the p-nitrophenol stuff performed rather stronger acidity. Therefore, the level of p-nitrophenol adsorption over Ni/AC catalyst was improved, and the reaction efficiency was enhanced consequently. The p-nitrophenol conversion and PAP selectivity reached 97.7 and 99.3% over Ni–K2O/AC catalyst, respectively. During the process of catalytic hydrogenation, higher PAP selectivity was kept successively. It indicated that no side reactions happened during the catalytic hydrogenation of p-nitrophenol.

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Reaction Kinetics, Mechanisms and Catalysis
Language English
Size B5
Year of
Foundation
1974
Volumes
per Year
1
Issues
per Year
6
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1878-5190 (Print)
ISSN 1878-5204 (Online)