Hollow cylindrical catalyst and a method for producing a maleic acid anhydride
AssigneeBASF SE
InventorsJens Weiguny, Sebastian Storck, Andreas Tenten
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Abstract
A catalyst used in a process for preparing maleic anhydride by heterogeneously catalyzed gas-phase oxidation of a hydrocarbon having at least four carbon atoms by means of oxygen-containing gases comprises a catalytically active composition comprising vanadium, phosphorus and oxygen and has a essentially hollow cylindrical structure in which (a) the ratio of the height h to the diameter of the continuous hole d2 is not more than 1.5 and (b) the ratio of the geometric surface area Ageo to the geometric volume Vgeo is at least 2 mm−1.
Claims8
A catalyst for preparing maleic anhydride by heterogeneously catalyzed gas-phase oxidation of a hydrocarbon having at least four carbon atoms, which comprises a catalytically active composition comprising vanadium, phosphorus and oxygen and has an essentially hollow cylindrical structure, wherein the hollow cylindrical structure has (a) a ratio of the height h to the diameter of the continuous hole d2 of not more than 1.5 and (b) a ratio of the geometric surface area Ageo to the geometric volume Vgeo of at least 2 mm−1.
Dependencies are inferred from the claim text.