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US 6,642,173 B2Granted
Catalyst
AssigneeRohm and Haas Company
InventorLeonard Edward Bogan, Jr.
Life of this patent
Estimating the term…
Abstract
A mixed metal oxide, which may be an orthorhombic phase material, is improved as a catalyst for the production of unsaturated carboxylic acids, or unsaturated nitrites, from alkanes, or mixtures of alkanes and alkenes, by contact with a liquid contacting member selected from the group consisting of organic acids, alcohols, inorganic acids and hydrogen peroxide.
Claims3
A process for preparing an improved catalyst, said process comprising:
- (a) providing a mixed metal oxide having the empirical formula
- AaVbNcXdOe
- 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, Se and Sb, and X is at least one element selected from the group consisting at 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, Lu, Au, Ag, Re, Pr, Zn, Ga, Pd, Ir, Nd, Y, Sm, Tb, Br, Cu, Sc, Cl, F and I,
- 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=0.1 to 2, c=0.1 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;
- and
- (c) recovering insoluble material from said contact mixture to obtain said improved catalyst.
5 more elements
Dependencies are inferred from the claim text.