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5249081 
Journal Article 
Acylation of toluene using rare earth cation exchanged zeolite beta as solid acid catalyst 
Sheemol, VN; Tyagi, B; Jasra, RV 
2004 
Yes 
Journal of Molecular Catalysis A: Chemical
ISSN: 1381-1169 
ELSEVIER SCIENCE BV 
AMSTERDAM 
215 
1-2 
201-208 
English 
WOS:000221512600027 
The catalytic activity of rare earth cations exchanged zeolite p was studied for the acylation of toluene with acetic anhydride as an acylating agent and nitrobenzene, o-dichlorobenzene and dichloroethane as the solvent in liquid phase in the temperature range of 368-408 K. The rare earth cation exchanged zeolites were observed to have the catalytic activity in the following order: La-beta > H-beta = Ce-beta > Dy-beta > Eu-beta > Sm-beta > Gd-beta > Nd-beta > Pr-beta with more than 95% selectivity towards the p-isomer. Among the solvents studied, nitrobenzene is the most favored for toluene acylation reaction. The correlation of catalytic activities of the different catalysts with the cyclohexanol dehydration as well as DRIFT spectroscopy showed that the toluene acylation is a Bronsted acid catalyzed reaction. (C) 2004 Elsevier B.V. All rights reserved. 
Chemistry; acylation, toluene, rare earth cation, zeolite beta, Bronsted acidity; friedel-crafts acylation, acetic-anhydride, h-beta