| abstract |
(57) [Problem] To provide a catalyst having good performance such as selectivity and activity in ammoxidation of alkanes. SOLUTION: An aqueous mixture containing a starting compound is mixed with 100 A method for producing a composite metal oxide represented by the following general formula [1], wherein a hydrothermal treatment is performed at a temperature of 350 to 350 ° C. ## STR1 ## Mo 1.0 V a Te b Sbα -b X x (NH 4) y O n [1] ( wherein, X is Ti, Zr, Nb, Ta, Cr, W, M n, Fe, Ru, Co, Rh, Ir, Ni, Pd, P represents one or more elements selected from t, Cu, Ag, Zn, In, Sn, Pb, Bi, and Ce, and 0.01 ≦ a <1.0, 0 ≦ b ≦ α, 0 ≦ x <1.0, 0.01 ≦ α / (1 + a + x) ≦ 0.50, 0 ≦ y ≦ (1 + a + x), n is a number determined by the oxidation state of another element. ) |