Process for the preparation of 2,3,5-trimethy1-p- benzoquinone
AssigneeDegussa-Huls AG
InventorsRalf Maassen, Steffen Krill
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Abstract
A process for the preparation of 2,3,5-trimethyl-p-benzoquinone by oxidation of 2,3,5- or 2,3,6-trimethylphenol using oxygen or a gas mixture containing oxygen in the presence of a two-phase liquid reaction medium composed of water and a neocarboxylic acid having to 11 carbon atoms with a copper (II) halide-containing catalyst system at elevated temperature.
Claims10
A process for the preparation of 2,3,5-trimethyl-p-benzoquinone by oxidation of 2,3,5- or 2,3,6-trimethylphenol using oxygen or a gas containing oxygen in a two-phase liquid reaction medium using a catalyst containing at least copper (II) halide at elevated temperature, wherein the reaction is carried out in a mixture composed of water and a neocarboxylic acid having 8 to 11 carbon atoms and at temperatures from 50° C. to 100° C.
Dependencies are inferred from the claim text.