Catalyst material
AssigneeDegussa-Huls Aktiengessellschaft
InventorsRainer Domesle, Ulrich Göbel, Lothar Mussmann, Egbert Lox, Thomas Kreuzer
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Abstract
A powdered catalyst material based on aluminum oxide, which contains at least one basic metal oxide and at least one noble metal from the platinum group of the Periodic Table of Elements in addition to aluminum oxide. The catalyst material is obtainable by loading a support material already stabilized by basic oxides by renewed impregnation with further basic oxides. After drying and calcining this post-impregnated material at temperatures below 800° C., the catalytically active noble metals are also incorporated into the support material by impregnation.
Claims5
A powdered catalyst material comprising aluminum oxide, at least one basic metal oxide, and at least one catalytically active noble metal,
- wherein the aluminum oxide and the at least one basic metal oxide form a composite support material for a catalytically active component,
- wherein the catalyst material has a specific surface area of more than 80 m2/g, and
- wherein a concentration of the at least one basic metal oxide in an outer edge zone with a thickness of less than 100 atomic layers, relative to a concentration of aluminum, is at least 20% greater than a concentration of the at least one basic metal oxide, relative to a concentration of aluminum, at a depth with a thickness of more than 100 atomic layers from the surface of said composite support material.
Dependencies are inferred from the claim text.