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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 8460626 B1

PDFFull Text
Date of Patent:
Jun. 11, 2013

Filed:

Dec. 23, 2010

Compositions based on cerium oxide, zirconium oxide and, optionally, another rare earth oxide, having a specific raised surface at 1100° c, method for the production and use thereof as a catalyst

Applicants:

Olivier Larcher, Perigny, FR;

Emmanuel Rohart, Sainte Soulle, FR;

Inventors:

Olivier Larcher, Perigny, FR;

Emmanuel Rohart, Sainte Soulle, FR;

Assignee:

Rhodia Electronics and Catalysis, Rochelle, FR;

Attorney:

Dentons US LLP

Primary Examiner:

Cam N Nguyen

Int. Cl.
CPC ...
B01J 23/00 (2006.01); B01J 31/00 (2006.01); B01J 8/02 (2006.01); B01D 53/56 (2006.01); B01D 53/94 (2006.01); C01B 21/00 (2006.01); C01B 23/00 (2006.01); C01B 25/00 (2006.01); C01B 31/00 (2006.01); C01B 33/00 (2006.01); C01B 35/00 (2006.01); C01G 28/00 (2006.01); C01G 30/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

The inventive composition, according to a first embodiment, consists essentially of a cerium oxide and a zirconium oxide in an atomic ratio Ce/Zr of at least 1. According to a second embodiment, said composition is based on cerium oxide, zirconium oxide with an atomic ratio Ce/Zr of at least 1 and at least one rare earth oxide other than cerium. After calcination at 1100° C., said composition has a specific surface of at least 9 m/g in the second embodiment. The inventive composition can be used as a catalyst especially for the treatment of waste gases from internal combustion engines.

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