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

Authors:   Clara Saux, Luis R. Pizzio, Liliana B. Pierella

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.

Keywords:
2,3,5-Trimethylphenol
2,3,5-Trimethylbenzoquinone
2,3,5-Trimethylhydroquinone
Co-based solid catalysts

Published in: Applied catalysis A: General  (Volume 452, Pages 1-222, 15 February 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

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

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