Patent ID: 6984750

Claim:
A process for the preparation of a supported catalyst, the process comprising: (a) providing a catalyst support; (b) sequentially depositing on said support a catalyst composition comprising, in random order, as essential elements, at least one layer comprising Mo, at least one layer comprising V, at least one layer comprising Te, and at least one layer comprising X, wherein X is at least one element selected from the group consisting of Nb, Ta, W, Ti, Al, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ni, Pd, Pt, Sb, Bi, B, In and Ce, to form a loaded support, said step of sequentially depositing providing relative amounts of said elements such that, after a calcination of said loaded support, the relative amounts of the elements satisfy the expression Mo a V b Te c X d wherein a, b, c and d are the relative atomic amounts of the essential elements Mo, V, Te and X, respectively, and, when a=1, b=0.01 to 1.0, c=0.01 to 1.0 and d=0.01 to 1.0; (c) calcining said loaded support.