Ammoxydation catalyst composition and method of manufacturing aminonitrile compd. using the same

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PURPOSE : To attain a high yield for hydrocyanic acid as well as acrylonitrile or methacrylonitrile and to suppress the reduction of the activity of a catalyst by using an ammoxidation catalyst represented by a specified formula when a nitrile compd. is produced by allowing propylene, isobutene or tert. butanol to react with molecular oxygen and ammonia. CONSTITUTION : This ammoxidation catalyst is represented by the formula, wherein X is one or more kinds of elements selected from among rare earth elements and yttrium, Y is one or more kinds of elements selected from among Ni, Co, Mn, Cr, In, Mg, Ca, Sr, Ba, Zn, Na and P, A is one or more kinds of elements selected from among K, Rb, Cs and Tl, (a), (b), (c), (d), (e), (f) and (g) show the atomic ratio of Mo : Bi : Fe : X : Y : A : O, 10<=a<=14, 0.001<=b<0.1, 0.1<=c<=4, 0.001<=d<=2, 0.1<=e<=12, 0.01<=f<=1.0 and (g) is the number of O atoms satisfying the valence requirements of the other elements.