Patent ID: 6610629
Filing Date: 2003-08-26
Classification: B01J,C07C,Y02P

Abstract:
A process for producing an oxide catalyst for use in a catalytic oxidation or ammoxidation of propane or isobutane in the gaseous phase,wherein said oxide catalyst comprises a composition represented by the following formula (I) Mo1.0VaXbNbcZdOnâ€ƒâ€ƒ(I) wherein: X is at least one element selected from the group consisting of antimony and tellurium; Z is at least one element selected from the group consisting of tungsten, chromium, titanium, aluminum, tantalum, zirconium, hafnium, manganese, rhenium, iron, ruthenium, cobalt, rhodium, nickel, palladium, platinum, zinc, boron, gallium, indium, germanium, tin, phosphorus, lead, bismuth, yttrium, rare earth elements and alkaline earth metals; and a, b, c, d, and n are, respectively, the atomic ratios of vanadium, X, niobium, Z and oxygen, relative to molybdenum, wherein 0.01&lE;a&lE;100; 0.01&lE;b&lE;100; 0.01&lE;c&lE;100; 0&lE;d&lE;100; and n is a number determined by the valence requirements of the other elements present, said process comprising providing an aqueous raw material mixture containing compounds of the component elements of the composition of said formula (I), and drying said aqueous raw material mixture, followed by calcination, wherein, in said aqueous raw material mixture, at least a part of the niobium compound as one of the compounds of said component elements is present in the form of a complex thereof with a complexing agent comprising a compound having a hydroxyl group bonded to an oxygen atom or a carbon atom.