ADDITIVES TO AMMOXIDATION CATALYSTS BASED ON METAL OXIDE MIXTURES INPUT BEFORE CALCINATION Russian patent published in 2017 - IPC B01J37/03 B01J23/887 C07C253/26 C07C255/08 

FIELD: chemistry.

SUBSTANCE: describes a process for preparing catalysts for producing acrylonitrile, acetonitrile and hydrogen cyanide and a process for converting an olefin comprising contacting at an elevated temperature of propylene and/or isobutylene, ammonia and oxygen in the vapor phase in the presence of a catalyst. The catalyst comprises a complex metal oxide, wherein the ratio of elements in mentioned catalyst expressed by the following formula: Mo₁₂Bi_aFe_bA_cD_dE_eF_fG_gCe_hO_x, wherein A represents at least one element selected from the group consisting of sodium, potassium, rubidium and cesium, D denotes at least one element selected from the group consisting of nickel, cobalt, manganese, zinc, magnesium, calcium, strontium, barium and cadmium; E represents at least one element selected from the group consisting of chromium, tungsten, boron, aluminium, gallium, indium, phosphorus, arsenic and vanadium; F denotes at least one element selected from the group consisting of lanthanum, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, yttrium, titanium, zirconium, hafnium, niobium, tantalum, aluminium, gallium, indium, thallium, silicon, germanium and lead; G is at least one element selected from the group consisting of silver, gold, ruthenium, rhodium, palladium, osmium, iridium, platinum and mercury; and is from 0.05 to 7, b is from 0.1 to 7, c is from 0.01 to 5, d is from 0.1 to 12, e is from 0 to 5, f is from 0 to 5, g is from 0 to 0.2, h Is from 0 to 5 and x is the number of oxygen atoms required to saturate the valence of other available elements. In the process of preparing the catalyst at least one nitrogen-containing compound is added, which decomposes when heated, wherein the nitrogen-containing compound decomposes when heated, is selected from the group consisting of ammonium compounds, nitrate compounds, nitrite compounds, amide compounds, nitrobenzoic compounds and ammonium hydroxide compounds, and wherein the nitrogen-containing compound decomposes under heating, is not a metal nitrate or metal nitrite being added during the preparation of the catalyst as source for the promoter metal in the catalyst.

EFFECT: high total degree of conversion to nitrile products, minimal combustion of ammonia, and the improved efficiency of the ammonia.

16 cl, 1 tbl, 4 ex