| 摘要 |
PROBLEM TO BE SOLVED: To provide a catalyst which exhibits high selectivity to a target product and high wear resistance in the production of an unsaturated acid or an unsaturated nitrile by the vapor phase catalytic oxidation or vapor phase catalytic ammoxidation of propane or isobutane. SOLUTION: The oxide catalyst is expressed by following general formula, Mo1VaNbbBcXdOn (X is at least one element selected from Sb or Te). Or, the oxide catalyst is expressed by following general formula, Mo1VaNbbBcXdZeOn (X is the same as defined above; Z is at least one element selected from Ti, Sn, Ga, Cr, Fe or the like). Unsaturated nitriles are produced by using these catalysts. |
