Niobium-doped vanadium/phosphorus mixed oxide catalyst
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United States of America Patent
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Dec 29, 2009
Grant Date -
Aug 3, 2006
app pub date -
Sep 15, 2004
filing date -
Sep 15, 2003
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Abstract
Disclosed is a process for the preparation of a modified vanadium/phosphorus mixed oxide catalyst for the partial oxidation of n-butane to maleic anhydride. The catalyst comprises vanadyl pyrophosphate as main component and niobium as a promoter element in an amount corresponding to an atomic ratio of vanadium to niobiurn in the range of 250:1 to 60:1. The catalyst exhibits improved activity, improved yield of maleic anhydride, and optimal performance from the very beginning of its catalytic lifetime.
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