MIXED METAL-OXIDE CATALYSTS

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FIELD : technological processes; chemistry. SUBSTANCE : catalyst composition for propylene ammoxidation containing system of metal oxides, having formula : Mo12BiaFebAcDdEeFfGgCehOx, wherein A represents, at least, one element, selected from group consisting of sodium, potassium, cesium and rubidium; D represents, at least, one element selected from group consisting of nickel, cobalt, manganese, zinc, magnesium, calcium, strontium, cadmium and barium; E is, at least, one element, selected from group, consisting of chromium, tungsten, boron, aluminium, gallium, indium, phosphorus, arsenic, antimony, vanadium and tellurium; F represents, at least, one element selected from group consisting of rare-earth element, titanium, zirconium, hafnium, niobium, tantalum, aluminium, gallium, indium, thallium, silicon, germanium and lead; G represents, at least, one element selected from group consisting of silver, gold, ruthenium, rhodium, palladium, osmium, iridium, platinum and mercury; a ranges from 0.05 to 7; b ranges from 0.1 to 7; c ranges from 0.01 to 5; d ranges from 0.1 to 12; e ranges from 0.01 to 0.1; f ranges from 0 to 5; g ranges from 0 to 0.2; h ranges from 0.01 to 5; and x is number of oxygen atoms required to satisfy requirements of other components valence. Catalyst composition contains, at least, approximately 15 % of m-phase plus t-phase by weight and is characterized by of m-phase to m-phase plus t-phase weight ratio of 0.45 or more, where amounts of m-phase and t-phase are determined by means of x-ray diffraction and model according to Rietveld modified analysis, wherein Rietveld modified analysis comprises four main phases. Also disclosed is acrylonitrile producing method, involving contact of propylene, ammonia and oxygen in vapor phase in presence of metal oxide catalyst. EFFECT : described are catalyst compositions, which are effective to provide for increased acrylonitrile production without considerable reduction in production of hydrogen cyanide and/or acetonitrile and providing total increase in acrylonitrile, hydrogen cyanide and acetonitrile production. 12 cl, 1 dwg, 2 ex