FIELD: process engineering.
SUBSTANCE: invention relates to catalyst of producing acrylonitrile or metacrylonitrile from propane or isobutane. Proposed mixed oxide catalyst is obtained via oxidative ammonolysis in gas phase. Said catalyst comprises the following elements: Molybdenum (Mo), vanadium (V), niobium (Nb), oxygen (O) and, at least one element selected from the group consisting of stibium (Sb) and tellurium (Te). Proposed method comprises heating of precursor solid mix containing compounds of molybdenum, vanadium, niobium, oxygen and, at least one element selected from the group consisting of stibium and tellurium in contact with gas flow at first heating rate of about 15°C/min unless said precursor solid mix reaches the temperature of preliminary calcination not exceeding 400°C. Besides, and not obligatorily, it includes bringing precursor solid mix in contact with hot zone at the temperature higher than approx. 100°C. Note here that said precursor is described by the following formula: Mo1VaSbbTecNbdOn, where 0.1≤a≤1.0, 0≤b≤1.0, 0≤c≤1.0, 0.001≤d≤0.25; n stands for quantity of oxygen atoms required for saturation of valency of all other elements of mixed oxide provided that one or several other elements may exist in lower oxidation state compared to maximum oxidation; a, b, c and d are relationships between mole number of appropriate elements and that of Mo.
EFFECT: new efficient process of making mixed oxide catalyst.
24 cl, 3 dwg, 2 tbl, 15 ex
