CATALYST, METHOD OF ITS OBTAINING AND METHOD OF BENZOIC ACID PRODUCTION Russian patent published in 2008 - IPC B01J31/18 B01J37/00 C07C63/06 C07C51/235 C07C51/285 

FIELD: chemistry.

SUBSTANCE: invention concerns organic synthesis field, particularly method of obtaining benzoic acid (C₆H₅COOH, benzenecarboxylic acid) by catalytic oxidation of benzyl alcohol in hydrogen peroxide solution, as well as catalysts for method implementation, and method of obtaining catalysts. Catalysts of benzoic acid production is nanostructurised bifunctional metallocomplex catalyst acting as oxidation and interphase transport catalyst. It is a complex compound of the general formula Q₃{PO₄[W(O)(O₂)₂]₄}, where: Q is quadruple ammonium cation [(R₁)₃N R₂]⁺, where: R₁ and R₂ contain 8 to 24 carbon atoms. The invention concerns method of obtaining catalyst for benzoic acid production by dissolution of compounds containing phosphor and tungsten in hydrogen peroxide solution with added interphase transport catalyst compound, with phosphor-tungsten heteropolyacids of Keggin or Dawson structure are used as compounds containing phosphor and tungsten, dissolution is performed at the following mol ratio: hydrogen peroxide to tungsten [H₂O₂]/[W]=15-50, with further addition of quadruple ammonium cation - [(R₁)₃N R₂]⁺ as interphase transport catalyst, where: R₁ and R₂ contain 8 to 24 carbon atoms. The invention also concerns method of obtaining benzoic acid by substrate oxidation in hydrogen peroxide in the presence of the catalyst described above.

EFFECT: increased efficiency of benzoic acid production process.

8 cl, 21 ex, 2 tbl, 1 dwg