FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing an oxide catalyst and a method of producing an unsaturated nitrile. Method of producing oxide catalyst for gas-phase catalytic ammoxidation of propane or isobutane and containing Mo, V, Sb, Nb and silica, includes a step of preparing the starting material, comprising a sub-stage (I) for preparing an aqueous liquid mixture (A) containing Mo, V and Sb; substage (II) for adding hydrogen peroxide to an aqueous liquid mixture (A), thereby promoting oxidation of the aqueous liquid mixture (A) and obtaining an aqueous liquid mixture (A'); and substage (III) mixing aqueous liquid mixture (A'), Nb-containing initial liquid material (B) and initial carrier material containing silica, and thereby obtaining aqueous liquid mixture (C); a step for drying an aqueous liquid mixture (C) and thereby obtaining a dry powder and a step for calcining dry powder in an atmosphere of an inert gas, where time elapsed from adding hydrogen peroxide to the aqueous liquid mixture (A) until mixing with it of an Nb-containing starting liquid material (B) is less than 5 minutes, and aqueous liquid mixture (A') before exposure of substage (III) has oxidation-reduction potential of 150–350 mV. Method of producing acrylonitrile involves a step for producing an oxide catalyst using the above described method of producing an oxide catalyst and a step for producing acrylonitrile, wherein a gas-phase catalytic ammoxidation reaction of propane or isobutane is carried out in the presence of the obtained oxide catalyst to thereby obtain acrylonitrile in accordance therewith.
EFFECT: providing a method by which an oxide catalyst which provides high output of an unsaturated nitrile can be obtained without the need to introduce complex steps and modifying agents.
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