Method for enhancing the productivity of vanadium antimony oxide catalysts
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United States of America Patent
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Issued Date -
Sep 16, 2004
app pub date -
Mar 5, 2004
filing date -
Nov 27, 2002
priority date (Note) -
Abandoned
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Abstract
A process for the manufacture of an improved vanadium antimony oxide oxidation or ammoxidation catalyst which comprises heat treating the catalyst at a temperature above 780.degree. C. in the presence of an oxygen enriched environment. Such catalysts are useful in processes for the ammoxidation of a C.sub.3-C.sub.5 paraffinic hydrocarbon to its corresponding .alpha.-.beta.-unsaturated nitrile, the ammoxidation of propylene with NH.sub.3 and oxygen to acrylonitrile, the ammoxidation of methylpyridine with NH.sub.3 and oxygen to make cyanopyridine, the ammoxidation of m-xylene with NH.sub.3 and oxygen to make isophthalonitrile, and the oxidation of o-xylene to make phthalic anhydride.
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