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Selective synthesis of p-xylene by alkylation of toluene with dimethyl carbonate over MgO-modified MCM-22

Paper ID Volume ID Publish Year Pages File Format Full-Text
52697 46881 2009 6 PDF Available
Title
Selective synthesis of p-xylene by alkylation of toluene with dimethyl carbonate over MgO-modified MCM-22
Abstract

Selective synthesis of p-xylene by vapor phase alkylation of toluene with dimethyl carbonate, over MgO-modified MCM-22, was carried out to demonstrate the relationship between acidity and catalytic performance. Characterization results show that the number of Brønsted acid sites on MCM-22 decreased significantly after MgO modification, which resulted in a decrease in activity. Selectivity for p-xylene was improved greatly over MgO-modified MCM-22, which can be attributed to effective suppression of xylene isomerization by the reduction in external surface Brønsted acid sites. The additional Lewis acid sites generated after MgO modification had no apparent effect on the catalytic performance.

Keywords
Dimethyl carbonate; Alkylation; Toluene; MCM-22
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Selective synthesis of p-xylene by alkylation of toluene with dimethyl carbonate over MgO-modified MCM-22
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 12, 25 June 2009, Pages 1609–1614
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
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Any Questions? feel free to contact us