Acylation of toluene using rare earth cation exchanged zeolite β as solid acid catalyst

被引：36

作者：

Sheemol, VN ^{[1
]}

Tyagi, B ^{[1
]}

Jasra, RV ^{[1
]}

机构：

[1] Cent Salt & Marine Chem Res Inst, Silicates & Catalysis Discipline, Bhavnagar 364002, Gujarat, India

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2004年 / 215卷 / 1-2期

关键词：

acylation; toluene; rare earth cation; zeolite beta; Bronsted acidity;

D O I：

10.1016/j.molcata.2004.02.002

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：201 / 208

页数：8

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