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Liquid-phase oxidation of cyclohexane to adipic acid catalysed by cobalt containing β-zeolites

Authors
Publisher
Elsevier Science & Technology
Identifiers
DOI: 10.1016/s0167-2991(97)81019-1

Abstract

Abstract Cobalt exchanged β-zeolites obtained by impregnation and solid state ion exchange and cobalt substituted β-zeolites obtained by incorporation of cobalt in the synthesis gel were studied towards the oxidation of cyclohexane into adipic acid. The Co-substituted β-zeolites were found to be effective catalysts for the oxidation of cyclohexane in acetic acid. In contrast, the use of Co-exchanged β-zeolites always led to inhibition of the oxidation. It was demonstrated that the catalytic activity came as a result of the dissolved cobalt in the reaction medium, while inhibition was ascribed to the accessible uncompensated aluminic sites of the zeolites.

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