Preparation of magnetic [gamma]-AIsub 2 sub sub 3 supported palladium catalyst for hydrogenation of nitrobenzene

Spherical alumina support with magnetic core of 134 nm in diameter was prepared by the controlled hydrolysis of aluminums iso-propoxide. The magnetite ... nanoparticles were first synthesized by coprecipitation. Later silica film was coated onto the surface of ... nano particles with the sodium sili...

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Bibliographic Details
Published in:AIChE journal 2008-09, Vol.54 (9)
Main Authors: Lang, Yuqi, Wang, Qiaoqiao, Xing, Jianmin, Zhang, Bo, Liu, Huizhou
Format: Article
Language:English
Online Access:Get full text
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Summary:Spherical alumina support with magnetic core of 134 nm in diameter was prepared by the controlled hydrolysis of aluminums iso-propoxide. The magnetite ... nanoparticles were first synthesized by coprecipitation. Later silica film was coated onto the surface of ... nano particles with the sodium silicate acidification method. Alumina was supported on ... film by the controlled hydrolysis of aluminum alkoxide in a dilute solution consisting of cyclohexane and 2-propanol. Finally, magnetic alumina supported palladium catalysts were prepared by microemulsion method. The surface morphology and crystal structure of the magnetic alumina and catalysts were characterized by XRD, TEM, BET, and VSM, respectively. The results showed that these kinds of composite particle exhibit superparamagnetic behavior with zero coercivity and remanence. The catalysts show high activity for nitrobenzene directly hydrogenating to aniline under mild conditions. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0001-1541