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Transalkylation of polynuclear aromatics with diisopropylbenzene over zeolite catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
44678 46052 2006 8 PDF Available
Title
Transalkylation of polynuclear aromatics with diisopropylbenzene over zeolite catalysts
Abstract

Transalkylation of naphthalene and biphenyl with p-diisopropylbenzene has been studied over Y, Beta, mordenite and ZSM-12 zeolites. The main products of naphthalene or biphenyl interaction with p-diisopropylbenzene were mono- and diisopropylsubstituted naphthalenes or biphenyls, cumene and benzene. Polyalkylated binuclear aromatic compounds were observed only in small amounts. Among the zeolites studied, Beta catalyst was the most active, while mordenite showed the highest shape selectivity towards β,β′-diisopropylnaphthalenes and p,p′-diisopropylbiphenyls. Dealumination of mordenite led to the creation of a secondary micro/mesopore structure, providing for easier transport of the alkylaromatic compounds inside the pores and higher acid sites accessibility. Both factors led to a significant improvement of the catalytic activity, stability and selectivity. The highest conversions of naphthalene (78%) and biphenyl (57%) were obtained over mordenite dealuminated by calcination at 750 °C followed by leaching with methanesulfonic acid, while the highest selectivities to β,β′-diisopropylnaphthalene (90%) and 4,4′-diisopropylbiphenyl (79%) were observed over calcined mordenite treated with oxalic acid.

Keywords
Transalkylation; Diisopropylbenzene; 2,6-Diisopropylnaphthalene; 4,4′-Diisopropylbiphenyl; Dealuminated mordenites
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Transalkylation of polynuclear aromatics with diisopropylbenzene over zeolite catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 307, Issue 1, 12 June 2006, Pages 70–77
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
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