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Journal of Molecular Catalysis A: Chemical

Journal of Molecular Catalysis A: Chemical

IF: 5.05
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Selective acetylation of toluene to 4-methylacetophenone over zeolite catalysts

Published:14 May 2001 DOI: 10.1016/S1381-1169(00)00569-0
T Jaimol, A.K Pandey, A.P Singh

Abstract

The vapour phase acetylation of toluene has been catalysed by acidic H-ZSM-5, H-mordenite and REY zeolite catalysts at 453?K in a tubular reactor at atmospheric pressure. H-ZSM-5 exhibited the best results during the reaction with respect to rate of acetylchloride conversion (TOF=7.5?mol?s?1?mol?1 Al×10?4), conversion of acetyl chloride (60.2?wt.%) and selectivity for 4-methylacetophenone (88.3%) compared to both H-mordenite and REY zeolites. It is revealed that the activity and selectivity of the catalyst strongly depend on the acidic properties and pore openings of the zeolites, respectively. It is observed that isomer ratio (4-methylacetophenone/2-methylacetophenone) is influenced by the reaction conditions and type of zeolite used in the reaction. With increasing reaction temperature and toluene to CH3COCl molar ratio, the conversion of CH3COCl (ACT) increases, while it decreases with the increase in reaction time, weight hourly space velocity (WHSV), Na-content and silica to alumina molar ratio of H-ZSM-5 in the acetylation of toluene. H-ZSM-5 is deactivated under the reaction conditions.

Substances (5)

Related products
Procduct Name CAS Molecular Formula Supplier Price
4'-Methylacetophenone 122-00-9 C9H10O 825 suppliers $5.00-$7368.90
Acetyl chloride 75-36-5 C2H3ClO 635 suppliers $7.62-$6706.51
2'-Methylacetophenone 577-16-2 C9H10O 399 suppliers $8.00-$650.00
ZEOLITE H-ZSM-5 - Inquiry
Rhenium, compd. with yttrium (2:1) 12440-60-7 ReY - Inquiry

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