CATALYST, METHOD FOR PREPARATION THEREOF AND METHOD FOR PREPARATION OF SUBSTITUTED QUINONES Russian patent published in 2019 - IPC B01J27/00 B82Y40/00 B01J27/24 B01J23/22 B01J23/30 C07C46/06 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for producing substituted quinones, including 2,3,5-trimethyl-1,4-benzoquinone (TMBQ), a key intermediate in the synthesis of vitamin E, widely used in medical practice and animal husbandry, as well as to the synthesis of catalysts for this method. Catalyst is described for the process of producing substituted quinones by oxidizing aromatic compounds with hydrogen peroxide, including vanadium-containing polyoxotungstate TBA_5-nH_n[γ-PV₂W₁₀O₄₀], where n=1, mounted on a solid carrier - nitrogen-containing carbon material, which is a nanotube or nanofibres, the content of polyoxotungstate in the catalyst is 5–25 wt. %. Method of preparation of this heterogeneous catalyst is that a carrier - nitrogen-containing carbon material - is added to the solution of polyoxotungstate in acetonitrile, which is a nanotube or nanofibres, and mineral acid, the resulting catalyst is separated by filtration from the solution and dried. Method for producing substituted quinones by oxidation of aromatics with hydrogen peroxide in the presence of the catalyst described above, including vanadium-containing polyoxotungstate, is also proposed TBA_5-nH_n[γ-PV₂W₁₀O₄₀], where n=1, in the environment of the aromatic solvent - acetonitrile.

EFFECT: creation of an effective heterogeneous catalyst for the oxidation of substituted phenols to quinones, a high-tech method for its preparation and the catalytic method of oxidation of substituted phenols to quinones using a cheap and environmentally friendly oxidant - hydrogen peroxide.

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