Patent ID: 6777571
Filing Date: 2004-08-17
Classification: B01J,C07C,Y02P

Abstract:
A process for producing an unsaturated carboxylic acid, which comprises subjecting an alkane or a mixture of an alkane and an alkene to a vapor phase catalytic partial oxidation reaction in the presence of a catalyst produced by a process comprising:a) providing a catalyst having a surface and comprising a mixed metal oxide having a base composition empirical formula AaDbEcXdOe, wherein A is at least one element selected from the group consisting of Mo and W, D is at least one element selected from the group consisting of V and Ce, E is at least one element selected from the group consisting of Te, Sb and Se, and X is at least one element selected from the group consisting of Nb, Ta, Ti, Al, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ni, Pt, Sb, Bi, B, In, As, Ge, Sn, Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra, Hf, Ag, Pb, P, Pm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu; and, when a =1, b=0.01 to 1.0, c=0.01 to 1.0, d=0.01 to 1.0, and e is dependent on the oxidation state of said other elements; and b) vapor depositing at least one dopant metal onto said surface of said catalyst whereby the performance of said catalyst is improved.