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Unsymmetrical alkylation of benzene over large pore zeolites

Paper ID Volume ID Publish Year Pages File Format Full-Text
52679 46880 2007 8 PDF Available
Title
Unsymmetrical alkylation of benzene over large pore zeolites
Abstract

One pot unsymmetrical alkylation of benzene with different alkylating agents is an interesting reaction, as the alkylated products have important commercial applications. Keeping this in view, one pot ethylation and isopropylation of benzene with diethyl carbonate and isopropyl alcohol were carried out over Hβ (Si/Al = 15), HY (Si/Al = 3) and HM (Si/Al = 10) zeolites in the vapour phase. In addition to homo-alkylated products, unsymmetrical dialkylated products were also obtained with significant selectivity. Nearly similar trend in selectivity was obtained over all the catalysts with increase in temperature. The zeolites with high density of acid sites are suggested to be beneficial for unsymmetrical alkylation, as they could provide more probability for the formation of both the alkyl cations together. The proper control of concentration of alkylating agents based on their formation and reactivity also appears to be important in enhancing unsymmetrical alkylation. The effect of temperature, feed ratio, WHSV and time-on-stream on the selectivity to unsymmetrical alkylation was studied and the results are presented in the manuscript.

Keywords
Unsymmetrical alkylation; Benzene; Diethyl carbonate; Isopropyl alcohol; Zeolites
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Unsymmetrical alkylation of benzene over large pore zeolites
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 7, July 2007, Pages 1137–1144
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
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