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Highly active and selective C-alkylation of p-cresol with cyclohexanol using p-TSA treated clays under solvent free microwave irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
41104 45877 2012 6 PDF Available
Title
Highly active and selective C-alkylation of p-cresol with cyclohexanol using p-TSA treated clays under solvent free microwave irradiation
Abstract

The efficiency of p-TSA treated clays was probed in the alkylation of p-cresol under solvent free microwave irradiation. The different aspects of the reaction studies include variation of temperature, duration of contact between the reactants, mole ratio of cresol to cyclohexanol and the clay treated with p-TSA to different extent. The acid strength as well as reaction parameters such as temperature and time were found to be the main factors controlling the reactivity and selectivity. The reaction was carried out in the temperature range 413–443 K. Lower temperature range favoured O-alkylation and higher temperatures yielded C-alkylated p-cresol. The catalyst retained its catalytic activity even after three consecutive runs. The results obtained with clays were compared with other solid acid catalysts such as aluminium exchanged clay, hydrochloric acid treated clay and K-10.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (154 K)Download as PowerPoint slideHighlights► p-Toluene sulphonic acid and a mineral acid hydrochloric acid to activate clay under MW. ► Mild acid treatment can generate materials of different surface characteristics. ► The efficiency of p-TSA treated clays was probed in the alkylation under solvent free MW. ► Alkylation of p-cresol yielded 89% conversion with 98% selectivity towards C-alkylation.

Keywords
p-TSA treated clay; Solid acid catalyst; Microwave irradiation; Solvent free alkylation
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Highly active and selective C-alkylation of p-cresol with cyclohexanol using p-TSA treated clays under solvent free microwave irradiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 413–414, 31 January 2012, Pages 157–162
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