NDLI: Alkylation of toluene with isopropyl alcohol catalyzed by Ce-exchanged NaX zeolite

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Alkylation of toluene with isopropyl alcohol catalyzed by Ce-exchanged NaX zeolite

Content Provider	Semantic Scholar
Author	Barman, Sanghamitra Maity, Sunil K. Pradhan, Narayan Chandra
Copyright Year	2005
Abstract	Abstract The industrially important cymene synthesis was carried out by toluene isopropylation over cerium-exchanged NaX zeolite. The modification of NaX zeolite by cerium exchange was found to enhance the catalytic activity of the zeolite to a considerable extent. The reactions were carried out in a fixed-bed flow reactor at atmospheric pressure with nitrogen as the carrier gas. The reaction conditions were optimized by varying temperature, reactants mole ratio and space-time. It was observed that in the isopropylation of toluene, the isopropyltoluene fraction contained both para and meta isomers. There was no ortho -cymene in the product stream. Alkylation studies at 433–513 K showed a decrease in p -cymene selectivity with increase in reaction temperature and increased formation of diisopropyl toluene at lower temperature. A systematic and detailed kinetic study was carried out for the alkylation reaction. From the product distribution pattern, a kinetic model for the reactions was proposed by following Langmuir–Hinshelwood approach. The kinetic and adsorption parameters of the rate equation were determined by non-linear regression analysis. The apparent activation energy for the main reaction was found to be 48.12 kJ/mol.
Starting Page	39
Ending Page	45
Page Count	7
File Format	PDF HTM / HTML
DOI	10.1016/j.cej.2005.08.014
Alternate Webpage(s)	https://9da816c0-a-62cb3a1a-s-sites.googlegroups.com/site/drsunilkmaity/pdf/ChEJ-05.pdf?attachauth=ANoY7cpLrLiykEPFkYxOq80LMtdphtFdfRn01hcOZ_z3n6Kp-IPpRDxY1JfYci_mBM-GpACqRtbWpc4gasXcmcMJvSC8rcE2RsoSrfwKTTIxh-TGJ4rWwpdjGCFJSceix2aElPLXde3HFTytNveQ0xAvMrLs2_8n7-IM9CKVlc6oL9uSBaPaxe59MvchuIaF9GTmFX7V6zMLZYBlXbUEqmuMfLf7B1E9tQ%3D%3D&attredirects=0
Alternate Webpage(s)	https://doi.org/10.1016/j.cej.2005.08.014
Volume Number	114
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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