Patent ID: 6638890
Filing Date: 2003-10-28
Classification: B01J,C07C

Abstract:
A complex oxide catalyst in which a complex oxide containing molybdenum and vanadium is supported on a carrier, characterized in that said complex oxide containing molybdenum and vanadium is a complex oxide which is expressed by the following general fomula (2):MOeVfWgCuhAiBjOkâ€ƒâ€ƒ(2) (where MO is molybdenum, V is vanadium, W is tungsten, Cu is copper, A is selected from the group consisting of antimony, niobium and tin; B is selected from the group consisting of phosphorus, tellurium, lead, arsenic and zinc, and O is oxygen; e, f, g, h, i, j and k denote atomic rations of Mo, V, W, Cu, A, B and O, where a=12, 2&lE;f&lE;15, 0&lE;g&lE;10, 0&lE;h&lE;6, 0i&lE;6, 0&lE;j&lE;5, and k is a numerical value determined by the valences and number of occurrences of the other elements), andsaid carrier is a modified carrier having on a surface of an inert carrier an oxide expressed by the formula (1):XaYbZcOdâ€ƒâ€ƒ(1) (wherein X is selected from the group consisting of alkaline earth metals; Y is selected from the group consisting of silicon, aluminum, titanium and zirconium; Z is selected from the group consisting of Group IA elements and Group IIB elements of the periodic table, boron, iron, bismuth, cobalt, nickel and manganese; of X, Y, Z and O, respectively, and where a=1, 0