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US 5,168,090 AGranted
Shaped oxidation catalyst structures for the production of maleic anhydride
AssigneeMonsanto Company
InventorsJerry R. Ebner, Robert A. Keppel
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AssigneeMonsanto Company
InventorsJerry R. Ebner, Robert A. Keppel
Estimating the term…
Shaped oxidation catalyst structures containing catalytic material comprised of mixed oxides of vanadium and phosphorus which are useful for the production of maleic anhydride via the partial oxidation of nonaromatic hydrocarbons, particularly n-butane, in the vapor phase with molecular oxygen or a molecular oxygen-containing gas are provided. Such structures are characterized by exhibiting (a) a geometric volume of from about 30 percent to about 67 percent of that exhibited by the void space-free solid geometric form, (b) an external geometric surface area/geometric volume ratio of at least about 20 cm.sup.-1, (c) a bulk density of from about 0.4 g/cm.sup.3 to about 1.4 g/cm.sup.3, and (d) a mechanical resistance sufficient to maintain substantially the structural integrity of the shaped structure under handling and use conditions.
A shaped oxidation catalyst structure for the production of maleic anhydride, which shaped structure comprises a solid geometric form having at least one (1) void space disposed in the external surface thereof, the shaped structure being characterized by (a) containing catalytic material comprised of mixed oxides of vanadium and phosphorus, and (b) exhibiting (i) a geometric volume of from about 30 percent to about 67 percent of that exhibited by the void space-free solid geometric form, (ii) an external geometric surface area/geometric volume ratio of at least about 20 cm.sup.-1, (iii) a bulk density of from about 0.4 g/cm.sup.3 to about 1.4 g/cm.sup.3, and (iv) a mechanical resistance sufficient to maintain substantially the structural integrity of the shaped structure under handling and use conditions.
Dependencies are inferred from the claim text.