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Dodecylbenzene transformations: Dealkylation and disproportionation over immobilized ionic liquid catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
42313 45920 2009 9 PDF Available
Title
Dodecylbenzene transformations: Dealkylation and disproportionation over immobilized ionic liquid catalysts
Abstract

AlCl3-based ionic liquids (ILs) supported on silica and MCM-41 have been used for disproportionation and dealkylation of dodecylbenzene (DDB) at low reaction temperature. AlCl3-based ionic liquids supported on MCM-41 were highly active for the conversion of DDB. Up to 55 mol% conversion and selectivity to benzene at 120 °C after 2 h reaction time were found for DDB transformation. Yield ratios between didodecylbenzenes and benzene are lower than 1 over such AlCl3-based ionic liquids supported on MCM-41. That means a part of the 1-dodecylbenzene is catalytically dealkylated and not disproportionated. An induction period has been found for such a catalyst. The catalytic dealkylation of DDB requires a high density of very strong Lewis acid sites. A detrimental influence of n-decane (used as solvent) on DDB conversion was observed. The presence of an increased amount of naphthalene in the initial reaction mixture led to a strong decrease of selectivity towards didodecylbenzenes in favor of selectivity for benzene and formation of dodecylnaphthalene.

Graphical abstractAlCl3-based ionic liquids (ILs) supported on silica and MCM-41 were used in the disproportionation and dealkylation of dodecylbenzene (DDB). Up to 55 mol% conversion and benzene selectivity of up to 60 mol% at 120 °C after 2 h reaction time were found. Yield ratios between didodecylbenzenes and benzene showed that a part of 1-dodecylbenzene was catalytically dealkylated and not disproportionated.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Dealkylation; Disproportionation; 1-Dodecylbenzene; Alkylaromatics; Immobilized ionic liquids
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Dodecylbenzene transformations: Dealkylation and disproportionation over immobilized ionic liquid catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 363, Issues 1–2, 1 July 2009, Pages 100–108
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
Any Questions? feel free to contact us