Preparation and characterization of V2O5/MgO catalysts for selective oxidation of 4-methylanisole to anisaldehyde

Preparation and characterization of V2O5/MgO catalysts for selective oxidation of 4-methylanisole... A series of V2O5/MgO catalysts containing 1 to 20 wt % V2O5 were prepared and characterized by means of X-ray diffraction, FT-infrared, electron spin resonance, scanning electron microscopy, NH3 and CO2 uptake measurements. Activity and selectivity of the catalysts were evaluated for selective oxidation of 4-methylanisole to p-anisaldehyde. Characterization results suggest that the vanadia when impregnated on magnesia interacts strongly with the support and results in the formation of a magnesium orthovanadate compound instead of two-dimensional over layers on the support surface. The V−Mg−O compound formed exhibits good conversion and product selectivity for the title reaction. Attempts are made to correlate the acid-base characteristics of the catalysts, obtained from NH3 and CO2 uptakes, with their catalytic properties. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Preparation and characterization of V2O5/MgO catalysts for selective oxidation of 4-methylanisole to anisaldehyde

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Publisher
Springer Netherlands
Copyright
Copyright © 1998 by Springer
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1163/156856798X00627
Publisher site
See Article on Publisher Site

Abstract

A series of V2O5/MgO catalysts containing 1 to 20 wt % V2O5 were prepared and characterized by means of X-ray diffraction, FT-infrared, electron spin resonance, scanning electron microscopy, NH3 and CO2 uptake measurements. Activity and selectivity of the catalysts were evaluated for selective oxidation of 4-methylanisole to p-anisaldehyde. Characterization results suggest that the vanadia when impregnated on magnesia interacts strongly with the support and results in the formation of a magnesium orthovanadate compound instead of two-dimensional over layers on the support surface. The V−Mg−O compound formed exhibits good conversion and product selectivity for the title reaction. Attempts are made to correlate the acid-base characteristics of the catalysts, obtained from NH3 and CO2 uptakes, with their catalytic properties.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Apr 15, 2009

References

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