FIELD: chemistry.
SUBSTANCE: disclosed is a method of producing an oxide catalyst containing antimony, comprising step (1) dissolving or dispersing a starting material containing an antimony source in a liquid consisting of water and/or a solvent, to produce initial liquid composition using antimony particles containing antimony (III) oxide as said antimony source; step (2) drying said initial liquid material obtained at step (1) to obtain a dried material; stage (3) of roasting said dried material obtained at step (2) to obtain calcined material, where the relative content of pentavalent antimony in the surface layer in the range of up to 2 nm from the surface of antimony particles, measured by X-ray photoelectron spectroscopy (XPS) analysis, is less than 70 at. %, and antimony particles have average particle size of 1.2 mcm or less. Also disclosed is a method of producing an unsaturated nitrile, comprising a step for producing an oxide catalyst which has been obtained using the method described above, and a production step, on which propane or isobutane and NH3 is subjected to gas-phase catalytic ammoxidation reaction in the presence of obtained oxide catalyst to obtain unsaturated nitrile. Also disclosed is a method of producing an unsaturated acid, comprising a step for producing an oxide catalyst which has been obtained using the method described above, and a production step, at which propane or isobutane is subjected to gas-phase catalytic oxidation reaction in the presence of obtained oxide catalyst to obtain unsaturated acid. Invention discloses use of antimony particles containing antimony (III) oxide as an antimony source in an oxide catalyst to obtain an antimony-containing oxide catalyst, wherein the content of pentavalent antimony in the surface layer in the range of up to 2 nm from the surface of antimony particles, measured by X-ray photoelectron spectroscopy (XPS) analysis, is less than 70 at. %, and said antimony particles have an average particle size of 1.2 mcm or less.
EFFECT: technical result is providing a method of producing an oxide catalyst for gas-phase catalytic ammoxidation of propane or isobutane, oxide catalyst, which enables to obtain corresponding unsaturated nitrile or unsaturated acid of propane or isobutane at high output, and method of producing unsaturated nitride and unsaturated acid using said oxide catalyst.
8 cl, 6 ex, 1 tbl, 2 dwg
