Claims
- 1. A process for preparing an unsaturated compound selected from the group consisting of unsaturated aldehydes and unsaturated carboxylic acids, said process comprising the step of:subjecting an alkane to catalytic oxidation in the presence of a catalyst comprising a mixed metal oxide of the formula AaMmNnXxOo and least one acid selected from the group consisting of (i) heteropolyacids, (ii) aluminas, iii) zirconias, (iv) titanias, (v) zeolites, and acid combinations thereof; wherein 0.25<a<0.98, 0.003<m<0.5, 0.003<n<0.5, 0.003<x<0.5; wherein the at least one acid is present in a range from 0.05 to 5 weight recent based on the total weight of the catalyst; o is dependent on the oxidation state of the other elements; and A is selected from the group consisting of Mo, W, Nb, Ta, Zr, Ru, and mixtures thereof; M is selected from the group consisting of V, Ce, Cr, and mixtures thereof; N is selected from the group consisting of Te, Se, and mixtures thereof; and X is selected from the group consisting of Nb, Ta, W, Ti, Al, Zr, Cr, Mn, Ru, Ca, Rh, Ni, Pd, Pt, Sb, B, In, Ce, and mixtures thereof.
- 2. The process of claim 1, wherein said alkane is at least one hydrocarbon selected from the group consisting of propane, isobutane, and n-butane.
- 3. The process of claim 1, wherein said unsaturated compound comprises at least (meth)acrolein.
- 4. The process of claim 1, wherein said unsaturated compound comprises at least (meth)acrylic acid.
CROSS REFERENCE TO RELATED PATENT APPLICATIONS
This non-provisional application is a divisional of non-provisional U.S. patent application Ser. No. 09/659,289 filed Sep. 12, 2000, which issued on Feb. 11, 2003 as U.S. Pat. No. 6,518,216, benefit of which is claimed under 35 U.S.C. §120 and which in turn claims benefit, under 35 U.S.C. §119(e), of U.S. provisional Application No. 60/154,160 filed Sep. 15, 1999, priority benefit of which is also claimed for the present divisional application.
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