Patent ID: 7053022
Filing Date: 2006-05-30
Classification: B01J,C07C,Y02P

Abstract:
1. A process for producing a catalyst comprising a mixed metal oxide having the empirical formula wherein M is an element selected from the group consisting of Te and Sb; X is an element selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, Sc, Y, La, Ti, Zr, Hf, Ta, Cr, W, Mn, Re, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, B, Ga, In, Pb, P, As, Sb, Bi, Se, F, Cl, Br, I, Pr, Nd, Sm and Tb, with the proviso that, when M is Sb, X cannot be Sb; a, b, c, d, e and f are the relative atomic amounts of the elements Mo, V, M, Nb, X and O, respectively; and when a=1, b=0.01 to 1.0, c=0.01 to 1.0, d=0.01 to 1.0, 0<e≦1.0 and f is dependent on the oxidation state of the other elements; the process comprising: (i) admixing compounds of elements Mo, V, M, Nb and X, as needed, and a solvent comprising water to form a first admixture containing at least 2 but less than all of said elements Mo, V, M, Nb and X; (ii) heating said first admixture at a temperature of from 25° C. to 200° C. for from 5 minutes to 48 hours; (iii) then, admixing compounds of elements Mo, V, M, Nb and X, as needed, with said first admixture to form a second admixture containing elements Mo, V, M, Nb and X, in the respective relative atomic proportions a, b, c, d, and e wherein, when a=1, b=0.01 to 1.0, c=0.01 to 1.0, d=0.01 to 1.0 and 0<e≦1.0; (iv) heating said second admixture at a temperature of from 50° C. to 300° C. for from 1 hour to 7 days, in a closed vessel under pressure; (v) recovering insoluble material from said closed vessel to obtain a catalyst.