Silver catalyst
AssigneeBASF SE
InventorsKlaus Herzog, Stefan Boeck, Wolf D. Mross, Juergen Plueckhan, Karl-Heinz Boehning, Ewald Gallei
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Abstract
A silver catalyst containing one or more alkali metals and also tungsten as promotors for the direct oxidation of ethylene with oxygen to form ethylene oxide, on a porous support substantially consisting of .alpha.-aluminum oxide and having a specific surface area (BET) of from 0.3 to 3 m.sup.2 /g, which contains tungsten in a concentration of from 60 to 330 ppmwt, based on the total catalyst, per m.sup.2 of surface area for each gram of supporting material.
Claims8
An improved catalyst in which silver is applied to an aluminum oxide support for the direct oxidation of ethylene with oxygen to form ethylene oxide which comprises:
- a catalyst consisting essentially of silver together with at least one alkali metal as a first promoter and tungsten as a second promoter applied to a porous support substantially consisting of .alpha.-aluminum oxide having a specific surface area (BET) of from 0.3 to 3 m.sup.2 /g, the amount of said tungsten applied to the support being from 60 to 280 ppmwt, based on the total catalyst, per m.sup.2 of surface area for each gram of said support.
Dependencies are inferred from the claim text.