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Acylation of anisole with long-chain carboxylic acids over wide pore zeolites

Paper ID Volume ID Publish Year Pages File Format Full-Text
44130 46004 2007 8 PDF Available
Title
Acylation of anisole with long-chain carboxylic acids over wide pore zeolites
Abstract

The acylation of anisole with long-chain carboxylic acids (hexanoic, octanoic and decanoic) has been studied over three large pore zeolites—beta (BEA), faujasite (FAU) and mordenite (MOR). The acylation of anisole with the long chain acids produced mainly the ketone (4-methoxy phenyl alkyl ketone) and small amounts of the ester (phenyl alkanoate). The results revealed the reaction to be influenced by the type of zeolite and its Si/Al ratio (acidity) besides the chain length (carbon number) of the carboxylic acid. In the acylation of anisole with hexanoic acid, the activity of the zeolites increased with dealumination as it led to the generation of mesopores that resulted in a decrease in diffusion resistance of the zeolites. The reactivity of the acids in the acylation reaction was found to decrease with increase in the carbon number. The experimental data have been fitted into a pseudo first order kinetic model.

Graphical abstractAcylation of anisole with long-chain carboxylic acids (hexanoic, octanoic and decanoic) was studied over three large pore zeolites—beta, faujasite and mordenite. Acylation produced mainly 4-methoxy phenyl alkyl ketone and small amounts of phenyl alkanoate. The reaction was influenced by the zeolite type, Si/Al ratio and the chain length of the acid. The reaction followed a pseudo first order kinetics. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Acylation; Anisole; Hexanoic acid; Octanoic acid; Decanoic acid; Zeolites
First Page Preview
Acylation of anisole with long-chain carboxylic acids over wide pore zeolites
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 317, Issue 2, 7 February 2007, Pages 250–257
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis