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Oxidation of 2,3,6-trimethylphenol in the presence of phosphomolybdovanadium heteropoly acids

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Abstract

Oxidation of 2,3,6-trimethylphenol (TMP) by O2 in the presence of H3+nPMo12−nVnO40 heteropoly acids (HPA-n) in AcOH−H2O yields up to 86% 2,3,5-trimethyl-1,4-ben-zoquinone (TMBQ) with 100% conversion of TMP. 2,2′,3, 3′,6,6′-Hexamethyl-4,4′-biphenol (BP) was isolated as an intermediate in this reaction. VO +2 ions formed due to the HPA-n dissociation, are suggested to be the active species of the catalyst.

Abstract

Окисление 2,3,6-триметилфенола (ТМФ) O2 в присутствии гетерополикислот H3+nPMo12−nVnO40 (ГПК-n) в AcOH−H2O дает 2,3,5-триметил-1,4-бензохинон (ТМБХ) с выходом до 86% при конверсии ТМФ 100%. Промежуточным продуктом при окислении ТМФ в ТМБХ является 2,2′,3,3′,6,6′-гексаметил-4,4′-бифенол (БФ). Активной формой катализатора являются ионы VO +2 , образующиеся в результате диссоциации ГПК-п.

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Authors and Affiliations

  1. Institute of Catalysis, 630090, Novosibirsk, USSR

    O. A. Kholdeeva, A. V. Golovin & I. V. Kozhevnikov

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  1. O. A. Kholdeeva
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  2. A. V. Golovin
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  3. I. V. Kozhevnikov
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Kholdeeva, O.A., Golovin, A.V. & Kozhevnikov, I.V. Oxidation of 2,3,6-trimethylphenol in the presence of phosphomolybdovanadium heteropoly acids. React Kinet Catal Lett 46, 107–113 (1992). https://doi.org/10.1007/BF02096685

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  • DOI: https://doi.org/10.1007/BF02096685

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