Appeal No. 2000-0073
Application No. 08/883,716
BACKGROUND
The invention is directed to a process for producing a catalyst useful in the
ammoxidation of an unsaturated hydrocarbon to its corresponding ",$ mono-unsaturated
nitrile. Particularly, the invention is directed to a process for producing a promoted VSbOx
catalyst useful in ammoxidation of isobutylene or propylene to methacrylonitrile or
acrylonitrile. (Specification, p. 2). The catalyst is formed by (i) forming a catalyst
precursor from the vanadium compound and at least a portion of the antimony compound, a
portion of the metal compound M and a portion of the support material; (ii) mixing the
catalyst precursor with an aqueous sol containing the remaining portion of the support
material and any remaining antimony and metal compound M to form a second slurry; (iii)
drying the second slurry to form a dry mixture; and (iv) calcining the dried mixture to form
the finished catalyst. Claim 1, which is representative of the claimed invention, appears
below:
1. A process of preparing a supported catalyst wherein said catalyst
comprises the elements and proportions indicated by the following empirical
formula:
V Sb M O
1.0 a b x
-2-
Page: Previous 1 2 3 4 5 6 7 8 Next
Last modified: November 3, 2007