Preparation of vanadium antimony oxide based catalysts using nano-scale iron
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United States of America Patent
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Mar 8, 2005
Grant Date -
May 27, 2004
app pub date -
Nov 27, 2002
filing date -
Nov 27, 2002
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Expired
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Abstract
A process for the manufacture of an improved iron promoted vanadium antimony oxide catalyst useful in the ammoxidation of propane to acrylonitrile wherein the source of iron (i.e. an iron containing compound such as Fe.sub.2 O.sub.3) employed in the catalyst preparation has a BET surface area greater than 120 m.sup.2 /gram. 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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