Patent ID: 6825380
Filing Date: 2004-11-30
Classification: B01J,C07C,Y02P

Abstract:
A process for producing an unsaturated carboxylic acid, which comprises subjecting a C3-8 alkane or a mixture of a C3-8 alkane and a C3-8 alkene to a vapor phase catalytic oxidation reaction in the presence of a catalyst containing a promoted mixed metal oxide having the empirical formulaAaMbNcXdZeOf whereinA is at least one element selected from the group consisting of Mo and W, M is at least one element selected from the group consisting of V and Ce, N is at least one element selected from the group consisting of Te, Sb and Se, 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, Pb, P, Pm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, and Z is selected from the group consisting of Sc, Y, Pr, Nd and Tb; and wherein, when a=1, b=0.01 to 1.0, c=0.01 to 1.0, d=0.01 to 1.0, e=0.001 to 0.1 and f is dependent on the oxidation state of the other elements.