USING TITANIUM DIOXIDE-CONTAINING CATALYST, PARTICULARLY TO OBTAIN PHTHALIC ANHYDRIDE, METHOD OF OBTAINING CATALYST AND METHOD OF USING CATALYST Russian patent published in 2011 - IPC C07C51/265 B01J21/06 B01J23/16 B01J23/04 B01J27/53 B01J27/14 

FIELD: chemistry.

SUBSTANCE: invention relates to a titanium dioxide-containing catalyst, particularly for obtaining phthalic anhydride via gas-phase oxidation of o-xylene and/or naphthalene. The invention describes use of titanium dioxide with sulphur content, in terms of elementary sulphur, less than approximately 1000 ppm and BET surface area of at least 5 m²/g to obtain a catalyst for gas-phase oxidation of aromatic hydrocarbons, in an active mass containing Nb, phosphorus, vanadium pentaoxide and an alkali metal, in which there is an adhesive in form of an organic polymer or copolymer, particularly a vinyl acetate copolymer; a method of producing a catalyst for gas-phase oxidation of aromatic hydrocarbons, particularly for obtaining phthalic anhydride via gas-phase oxidation of o-xylene, naphthalene or mixture thereof, comprising the following steps: a) preparation of an active mass containing TiO₂ as described in one the paragraphs above; b) preparation of an inert support, particularly an inert support in form of moulding powder; c) depositing the catalytically active mass onto the inert support, particularly in a fluidised or boiling bed. Described also is a method for gas-phase oxidation of at least one aromatic hydrocarbon, where a) a catalyst is prepared, said catalyst containing titanium dioxide with sulphur content, in terms of elementary sulphur, less than approximately 1000 ppm and BET surface area of at least 5 m²/g; in an active mass containing Nb, phosphorus, vanadium pentaoxide and an alkali metal, in which there is an adhesive in form of an organic polymer or copolymer, particularly a vinyl acetate copolymer; b) the catalyst is brought into contact with a gas stream containing at least one aromatic hydrocarbon and oxygen to carry out gas-phase oxidation of at least one hydrocarbon.

EFFECT: obtaining catalysts characterised by high conversion with high selectivity, thus increasing output and cost effectiveness.

21 cl, 12 ex, 3 tbl