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AssigneeBASF SE
InventorsCornelia Katharina Dobner, Stefan Altwasser, Hagen Wilmer, Frank Rosowski
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The catalytically active mass of a catalyst molded body comprises a multi-element oxide containing vanadium and phosphorus. The specific pore volume PV (in ml/g) of the catalyst molded body, the bulk density p of the catalyst molded body (in kg/l), the geometric surface area Ageo (in mm2), and the geometric volume Vgeo (in mm3) of the catalyst molded body satisfy the condition 0.275<PV·ρ·Ageo/Vgeo. In a method for producing maleic acid anhydride by heterogeneously catalytic gas phase oxidation of a hydrocarbon, the catalyst molded body allows a lower pressure loss and a high yield.
-11. (canceled)
A shaped catalyst body which has an essentially cylindrical body having a longitudinal axis, where the cylindrical body has at least one internal hole running right through the body essentially parallel to the cylindrical axis of the body, and whose catalytically active composition comprises a vanadium- and phosphorus-comprising multielement oxide, wherein the specific pore volume PV (in ml/g) of the shaped catalyst body, the bulk density ρ of the shaped catalyst body (in kg/l), the geometric surface area Ageo (in mm2) and the geometric volume Vgeo (in mm3) of the shaped catalyst body fulfill the condition:
Dependencies are inferred from the claim text.