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Active and recyclable sulphated zirconia catalysts for the acylation of aromatic compounds

Paper ID Volume ID Publish Year Pages File Format Full-Text
44189 46007 2006 8 PDF Available
Title
Active and recyclable sulphated zirconia catalysts for the acylation of aromatic compounds
Abstract

Mesoporous sulphated zirconia catalysts have been prepared by precipitation of Zr(OH)4 at constant basic pH and tested for the acylation of anisole with benzoic anhydride. All samples have been characterized by N2 physisorption, ion chromatography and thermal analysis coupled with MS analysis of evolved gases (EGA). The samples possessed high specific surface areas and mean pore size in the mesopore range. TG/DSC/EGA analysis allowed us to observe all phenomena related to the calcination process and to better understand the catalyst behavior. Observed phenomena are physisorbed water elimination, dehydroxylation, sulphating agent decomposition, phase transitions and sulphate species removal. Catalytic tests were carried out at different temperatures (30–50 °C) after a thermal treatment. The effects of the precipitation pH, calcination temperature and activation temperature on the catalytic performances were studied. Reuse of the catalyst was also appraised.

Keywords
Sulphated zirconia; Friedel–Crafts acylation; Fine chemicals; Catalyst recycling; Heterogeneous catalysis
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Active and recyclable sulphated zirconia catalysts for the acylation of aromatic compounds
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 299, 17 January 2006, Pages 137–144
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us