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Research Article | Open Access

Selective liquid phase oxidation of cyclohexane over Pt/CeO2–ZrO2–SnO2/SiO2 catalysts with molecular oxygen

Nobuhito IMANAKA( )Toshiyuki MASUIKazuya JYOKO
Department of Applied Chemistry, Faculty of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Abstract

Partial oxidation of cyclohexane into cyclohexanone and cyclohexanol (KA-oil) is an industrially significant reaction for producing precursors for the synthesis of ε-caprolactam and adipic acid, which are the building blocks of nylon. However, to date, the cyclohexane conversion ratio has usually been limited to less than 6% to prevent further oxidation of the cyclohexanol and cyclohexanone targets. In this study, we report that Pt/CeO2–ZrO2–SnO2/SiO2, in which CeO2–ZrO2–SnO2 provide reactive oxygen molecules from inside the bulk, can act as efficient catalysts. Optimization of the catalyst composition and reaction conditions provided a cyclohexane conversion ratio of 24.1% and a total selectivity for cyclohexanol and cyclohexanone of 83.4% at 130 ℃ in 0.5 MPa (4.9 atm) air for 7 h over a 5wt%Pt/16wt%Ce0.68Zr0.17Sn0.15O2.0/SiO2 catalyst. This catalyst has significant advantages over conventional catalysts because the reaction proceeds at a lower pressure, and there is no need for toxic radical initiators or free-radical scavengers.

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Journal of Advanced Ceramics
Pages 111-117
Cite this article:
IMANAKA N, MASUI T, JYOKO K. Selective liquid phase oxidation of cyclohexane over Pt/CeO2–ZrO2–SnO2/SiO2 catalysts with molecular oxygen. Journal of Advanced Ceramics, 2015, 4(2): 111-117. https://doi.org/10.1007/s40145-015-0138-0

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Received: 07 November 2014
Revised: 09 December 2014
Accepted: 11 December 2014
Published: 30 May 2015
© The author(s) 2015

Open Access: This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

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