Patent ID: 7348292
Filing Date: 2008-03-25
Classification: B01J,C07C,Y02P

Abstract:
1. A process for preparing an improved catalyst, said process comprising: (a) providing a mixed metal oxide having the empirical formula  wherein A is at least one element selected from the group consisting of Mo and W, N 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, Bi, B, In, Ce, 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,  wherein A, V, N and X are present in such amounts that the atomic ratio of A:V:N:X: is a:b:c:d, and  wherein, when a=1, b=0.01 to 2, c=0.01 to 1, d=0.01 to 1 and e is dependent on the oxidation state of the other elements; (b) contacting said mixed metal oxide with a liquid contact member selected from the group consisting of organic acids, alcohols, inorganic acids and hydrogen peroxide to form a contact mixture; (c) recovering insoluble material from said contact mixture; (d) calcining said recovered insoluble material in a non-oxidizing atmosphere to form a calcined recovered insoluble material; and (e) contacting said calcined recovered insoluble material with a source of halogen.