Method for producing 2,3,5-trimethyl benzoquinone by oxidation of 2,3,6-trimethylphenol
AssigneeBASF SE
InventorsRichard Dehn, Michael Kraus, Martine Dehn, Manuel Danz, Joaquim Henrique Teles
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Abstract
The invention relates to a method for producing 2,3,5-trimethyl benzoquinone or a compound containing 2,3,5-trimethyl benzoquinone, the method comprising the following steps: Oxidation of 2,3,6-trimethylphenol with oxygen or an oxygen-containing gas in a two-or multi-phase reaction medium in the presence of a catalyst or catalyst system containing at least one copper (II)-halide to a mixture containing 2,3,5-trimethyl benzoquinone, characterized in that the reaction medium contains water and at least one secondary aliphatic acyclic alcohol having 6 or more, preferably 7 or more, carbon atoms.
Claims8
A mixture consisting essentially of 2,3,5-trimethylbenzoquinone, the mixture being prepared by a process consisting essentially of the following step:
- (i) oxidizing 2,3,6-trimethylphenol to 2,3,5-trimethylbenzoquinone with oxygen or an oxygen-containing gas in a two-phase or multiphase reaction medium in the presence of a catalyst or catalyst system at least comprising a copper(II) halide, to give a mixture comprising 2,3,5-trimethylbenzoquinone,
- wherein the reaction medium comprises water and at least one secondary aliphatic acyclic alcohol having 6 or more carbon atoms.
A mixture comprising 2,3,5-trimethylbenzoquinone, the mixture being prepared by a process consisting essentially of the following step:
- (i) oxidizing 2,3,6-trimethylphenol to 2,3,5-trimethylbenzoquinone with oxygen or an oxygen-containing gas in a two-phase or multiphase reaction medium in the presence of a catalyst or catalyst system at least comprising a copper(II) halide, to give a mixture comprising 2,3,5-trimethylbenzoquinone,
- wherein the reaction medium comprises water and at least one secondary aliphatic acyclic alcohol having 6 or more carbon atoms wherein the mixture has a copper content from 210 to 220 mg/kg.
Dependencies are inferred from the claim text.