Sasol Germany Gmbh

Treibacher Industrie Ag

Frank Alber

Karl Schermanz

Amod Sagar

Reiner Glöckler

Marcos Schöneborn

Kai Dallmann

Sonke Rolfs

Kai Dallman

Sönke Rolfs

The subject matter of the invention is a method for producing composites, comprising mixed oxides of aluminum oxide and cerium/zirconium, hereinafter referred to briefly as Al/Ce/Zr oxide composite(s), using boehmite and soluble cerium/zirconium salts. Al/Ce/Zr oxide composites produced in this way have an increased thermal stability.

Ceria zirconia alumina composition with enhanced thermal stability

A process for the preparation of a calcined mixed oxide comprising Al-, Ce- and Zr-oxides, comprising the steps of providing an aqueous slurry comprising hydroxides of cerium and zirconium, contacting the hydroxides of cerium and zirconium with an alumina precursor to obtain an aqueous suspension of solids, isolating the solids from the aqueous suspension and drying to obtain a solid composition, calcining the solid composition of step (c) at a temperature from 450&#xb0; C. to 1200&#xb0; C. for at least 1 hour to obtain a calcined mixed oxide.

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Hamburg, Germany

Frank Alber