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Highly efficient solvent free oxidation of ethylbenzene using some recyclable catalysts: The role of linker in competency of manganese nanocatalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
41431 45889 2011 12 PDF Available
Title
Highly efficient solvent free oxidation of ethylbenzene using some recyclable catalysts: The role of linker in competency of manganese nanocatalysts
Abstract

SiO2–Al2O3 mixed-oxide was functionalized with 3-aminopropyl-triethoxysilane (3-APTES) and 2-aminoethyl-3-aminopropyl-trimethoxysilane (2-AE-3-APTMS) groups. The resulting modified nanosized SiO2–Al2O3 mixed-oxides were further functionalized with three different Schiff base groups followed by complexation with Mn(OAc)2 to afford the corresponding immobilized Mn catalysts. The synthesized materials were characterized by FT-IR spectroscopy, UV–vis, CHN elemental analysis, ICP-MS, EPR, SEM, and TEM. The catalytic activities of the heterogenized Mn catalysts were studied in the oxidation of ethylbenzene without the need of any solvent, at 80 °C, using tert-butyl hydroperoxide as oxygen source. Si/Al-pr-NH-et-Nmethyl-2-pyridylketone-Mn had high catalytic activity and selectivity to acetophenone (93%), and could be reused at least 4 times without significant loss in activity.

Graphical abstract.Figure optionsDownload full-size imageDownload high-quality image (148 K)Download as PowerPoint slideResearch highlights► The Mn catalysts immobilized on functionalized nanosized SiO2–Al2O3 used as catalysts. ► These catalysts were studied in the oxidation of ethylbenzene to acetophenone. ► Without the need of any solvent. ► The selectivity of acetophenone reached to 93% at TBHP/ethylbenzene molar ratio (1:1).

Keywords
Mn nanocatalyst; Ethylbenzene; Acetophenone; Oxidation; Nanosized SiO2–Al2O3
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Highly efficient solvent free oxidation of ethylbenzene using some recyclable catalysts: The role of linker in competency of manganese nanocatalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 399, Issues 1–2, 31 May 2011, Pages 75–86
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