| abstract |
The present invention relates to a fluid bed ammoxidation reaction catalyst comprising silica and a metal oxide, wherein the complex of silica and metal oxide is represented by the following general formula (1): Mo 12 Bi a Fe b Ni c Co d Ce e Cr f X g O h /(SiO 2 ) A … (One) (In formula (1), X represents at least one element selected from the group consisting of K, Rb and Cs, 0.1≤a≤1, 1≤b≤3, 1≤c≤6.5, 1≤d≤6.5 , 0.2≤e≤1.2, f≤0.05 and 0.05≤g≤1, h satisfies the valence of each constituent element except silica, A represents the content (mass %) of silica, and 35≤A≤ 48, and the values of α, β and γ calculated from the following equations (2), (3) and (4) satisfy 0.03≤α≤0.08, 0.2≤β≤0.4 and 0.5≤γ≤2 do.) α=1.5 a/(1.5(b+f)+c+d)… (2) β=1.5(b+f)/(c+d)… (3) γ=d/c… (4) |