Issue 4, 1999

Liquid-phase oxygenation of benzene over supported vanadium catalysts

Abstract

The liquid-phase oxygenation of benzene was studied using supported vanadium(V) catalysts. Molecular oxygen and ascorbic acid were used as the oxidant and reducing reagent, respectively. The reduced vanadium species is suggested to be the active catalytic species in this reaction system. The catalytic activity of the supported V catalysts for phenol formation was found to be somewhat higher than those of supported Cu counterparts. The addition of Cu ions to the supported V catalyst caused an increase in the yield of phenol. The leaching of the catalytically active V species from the support during the liquid-phase oxidation was also inhibited by the addition of Cu ions to the supported V catalysts. The concentration of acetic acid in the aqueous solvent was found to have an optimum value for the phenol production. The formation of hydrogen peroxide was observed during the benzene oxidation catalyzed by the supported V catalyst, and the accumulated amount of the formed hydrogen peroxide was quantitatively detected by iodometry. The electronic absorption spectra of the reaction solution including the V species also indicated the formation of hydrogen peroxide during the benzene oxidation. The produced hydrogen peroxide was suggested to directly participate in the phenol formation from benzene.

Article information

Article type
Paper

J. Chem. Soc., Perkin Trans. 2, 1999, 847-854

Liquid-phase oxygenation of benzene over supported vanadium catalysts

M. Ishida, Y. Masumoto, R. Hamada, S. Nishiyama, S. Tsuruya and M. Masai, J. Chem. Soc., Perkin Trans. 2, 1999, 847 DOI: 10.1039/A808115H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements