| 摘要 |
A process for the catalytic production of maleic anhydride from n-butane with sustained high activity for the catalyst which comprises contacting the n-butane feed with oxygen gas and a catalyst comprising oxides of vanadium and phosphorus and maintaining between 0.5 and 50 mole percent propane in the feed, based on propane plus n-butane, during the normal onstream time.
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