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2,3,5-Trimethylphenol oxidation over Co-based solid catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
40487 45856 2013 7 PDF Available
Title
2,3,5-Trimethylphenol oxidation over Co-based solid catalysts
Abstract

2,3,5-Trimethylphenol (TMP) was oxidized with hydrogen peroxide employing cobalt based solid materials. K6[CoW12O40]·6H2O (CoW12) was probed as selective catalyst for the oxidation obtaining better results when it was supported over ZSM-5 zeolites (CoW12-ZSM-5). CoW12-ZSM-5 was found to be an efficient catalyst in the oxidation of TMP to 2,3,5-trimethylbenzoquinone (TMBQ) and 2,3,5-trimethylhydroquinone (TMHQ) under mild reaction conditions. Liquid phase reaction parameters were evaluated obtaining better results employing hydrogen peroxide as oxidant, with an oxidant/substrate molar ratio of 5, methanol as solvent and 60 °C as reaction temperature. An apparent activation energy of 94.19 kJ/mol was obtained.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (95 K)Download as PowerPoint slideHighlights► Trimethylphenol selective oxidation to trimethylbenzoquinone and trimethylhydroquinone. ► K6[CoW12O40]·6H2O supported on ZSM-5 presents best behavior as oxidation catalyst. ► The estimate activation energy for trimethylphenol oxidation is 94.19 kJ/mol.

Keywords
2,3,5-Trimethylphenol; 2,3,5-Trimethylbenzoquinone; 2,3,5-Trimethylhydroquinone; Hydrogen peroxide; Co-based solid catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 452, 15 February 2013, Pages 17–23
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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