Ceria zirconia alumina composition with enhanced thermal stability

US9889428B2 · kind B2 · utility

Assignees

• TREIBACHER INDUSTRIE AG · AT
• Sasol Germany GmbH · DE

Inventors

• Karl Schermanz · Launsdorf, AT
• Amod Sagar · Althofen, AT
• Marcos Schoneborn · Hamburg, DE
• Reiner Glockler · Wasserburg am Inn, DE
• Kai Dallmann · Brunsbüttel, DE
• Frank Alber · Hamburg, DE
• Sonke Rolfs · Itzehoe, DE

Key dates

• Filing date: Jul 13, 2012
• Grant date: Feb 13, 2018
• Expiry date: Jul 13, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2523/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

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.