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...

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Bibliographische Detailangaben
Hauptverfasser: DALLMANN, Kai, SCHERMANZ, Karl, SCHÖNEBORN, Marcos, ALBER, Frank, SAGAR, Amod, ROLFS, Sönke, GLÖCKLER, Reiner
Format: Patent
Sprache:eng
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Zusammenfassung: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°C to 1200°C for at least 1 hour to obtain a calcined mixed oxide.