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New precursors to vanadium phosphorus oxide catalysts have been synthesized based on alteration of the layered structure found in the active VPO catalysts. n-Alkyl amine intercalation compounds of vanadyl hydrogen phosphate hemihydrate have been prepared that are transformed into active vanadyl pyrophosphate catalysts. Catalytic performance for selective oxidation of n-butane to maleic anhydride...
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