| 摘要 |
A catalyst which is a complex oxide catalyst represented by the following general formula (1): MoaVbWcCudAeBfCgDhEiOx (1) (in which Mo is molybdenum; V is vanadium, W is tungsten, Cu is copper, A is at least an element selected from antimony, niobium and tin; B is at least an element selected from alkaline earth metals; C is at least an element selected from silicon, aluminum, titanium and zirconium; D is at least an element selected from phosphorus, tellurium, cerium, lead, arsenic and zinc; E is at least an element selected from Group IA and Group IIIb elements of the periodic table, boron, iron, bismuth, cobalt, nickel and manganese; and O is oxygen; a, b, c, d, e, f, g, h, i and x denote the atomic ratios of Mo, V, W, Cu, A, B, C, D, E and O, respectively; and where a=12, 2<=b<=15, 0<=c<=10, 0<d<=6, 0<=e<=6, 0<f<=10, 0<g<=10, 0<=h<=5, 0<=i<=5, and x is a numerical value determined by the extents of oxidation of the other elements) which is characterized by being formed of a complex oxide which is prepared by using, as at least a part of the supply sources of components B and C, a compound containing both of the components B and C is provided. The catalyst is useful for vapor phase catalytic oxidation, in particular, is suitable as a catalyst for preparing acrylic acid by vapor phase catalytic oxidation of acrolein.
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