WEAR-RESISTANT AMMOXIDATION CATALYSTS BASED ON MIXED OXIDES OF METALS Russian patent published in 2016 - IPC B01J23/887 B01J37/03 C07C253/26 

FIELD: chemistry.

SUBSTANCE: invention discloses a catalyst composition used for conversion of olefin selected from a group consisting of propylene, isobutylene and their mixtures, into acrylonitrile, methacrylonitrile and their mixtures, and the conversion method. Wear-resistant catalyst composition for olefin ammoxidation contains a system of metal oxides, herewith the ratio of elements in the said catalyst is illustrated with the following formula: Mo₁₂Bi_aFe_bA_cD_dE_eF_fG_gCe_hO_x, where: A denotes at least one element selected from sodium, potassium, rubidium and caesium; D denotes at least one element selected from a group consisting of nickel, cobalt, manganese, zinc, magnesium, calcium, strontium, cadmium and barium; E denotes at least one element selected from a group consisting of chromium, tungsten, boron, aluminium, gallium, indium, phosphorus, arsenic, antimony, vanadium and tellurium; F denotes at least one element selected from a group consisting of rare-earth element titanium, zirconium, hafnium, niobium, tantalum, aluminium, gallium, indium, thallium, silicon, germanium and lead; G denotes at least one element selected from a group consisting of silver, gold, ruthenium, rhodium, palladium, osmium, iridium, platinum and mercury; a, b, c, d, e, f, g, h and x, respectively denote the number of atoms of bismuth (Bi), iron (Fe), A, D, E, F cerium (Ce) and oxygen per 12 atoms of molybdenum (Mo), where a has a value from 0.05 up to 7, b has a value from 0.1 up to 7, c has a value from 0.01 to 5, d has a value from 0.1 to 12, e has a value from 0 to 5, f has a value from 0 to 5, g has a value from 0 to 0.2, h is from 0.01 to 5 and x denotes the number of oxygen atoms required for saturation of the valence of the other contained components, 1.5 ≤ h/b ≤ 5. Said catalyst composition contains a carrier selected from a group consisting of silicon dioxide, aluminium oxide, zirconium, titanium dioxide or their mixtures, and the number of the said carrier is within the range between 30 and 70 % of the weight of the catalyst composition. Method of olefin conversion is implemented by reacting in vapour phase at high temperature and pressure of the said olefin with a gas containing molecular oxygen, and ammonia in presence of wear-resistant catalyst.

EFFECT: technical result is high resistance of the catalyst to abrasion together with high degree of olefins conversion.

6 cl, 3 dwg, 4 tbl, 11 ex