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Improved Attrition-resistant VPO Catalyst for Alkane Oxidation
This process produces an attrition-resistant VPO catalyst useful for fluidized bed oxidations of lower alkanes such as n-butane to maleic anhydride. Tailored attrition resistance produces a catalyst life consistent with the rate of catalyst makeup . Makeup is necessary for consistent oxidation activity. This process and resulting attrition resistant catalyst is intended to alleviate a specific problem associated with transition metal oxide containing catalysts that can expand and shrink during the oxidation and reduction cycles associated with continuous use and the associated increase attrition losses observed during the reduced state.manufacture attrition resistant vanadium/phosphorous oxide catalyst steps a) slurry i) precursor particles ii) aqueous phosphoric acid solution iii) optionally colloidal silica polysilicic mixture thereof b) spray drying (a) solids c) calcining dried (b)

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