Oxide catalyst and method for producing unsaturated nitrile

Abstract

An oxide catalyst to be used for gas-phase catalytic ammoxidation reaction of propane or isobutane, the oxide catalyst comprising a composite oxide, wherein the composite oxide comprises a catalytically active species to be isolated from the composite oxide using a hydrogen peroxide solution, and the catalytically active species has an average composition represented by the following formula (1) in STEM-EDX measurements; Formula: Mo1VaSbbNbcWdXeOn   (1) wherein X represents at least one selected from the group consisting of Te, Ce, Ti, and Ta; a, b, c, and d satisfy relations represented by a formulae of 0.050≤a≤0.200, 0.050≤b≤0.200, 0.100≤c≤0.300, 0≤d≤0.100, 0≤e≤0.100, and a≤c; and n represents a number determined by valences of the other elements.

Dependencies are inferred from the claim text.