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.:
Date of Patent:
Aug. 06, 2019
Filed:
Jun. 13, 2012
Simon Ifrah, La Jarrie, FR;
Emmanuel Rohart, Sainte Soulle, FR;
Julien Hernandez, Antony, FR;
Dominique Horbez, Franconville, FR;
Lama Itani, Savigny-sur-Orge, FR;
Simon Ifrah, La Jarrie, FR;
Emmanuel Rohart, Sainte Soulle, FR;
Julien Hernandez, Antony, FR;
Dominique Horbez, Franconville, FR;
Lama Itani, Savigny-sur-Orge, FR;
RHODIA OPERATIONS, Aubervilliers, FR;
Abstract
The composition of the invention is based on oxides of cerium, of zirconium and of at least one rare earth metal other than cerium, with a cerium oxide content of greater than 50% by weight and it has, after calcination at 1000° C. for 4 hours, a specific surface area of at least 20 m/g and an amount of mobile oxygen between 200° C. and 400° C. of at least 0.8 ml O/g. It is prepared by a process in which, in a reactor, a mixture of compounds of cerium, of zirconium and of the other rare earth metal is reacted continuously with a basic compound with a residence time of the reaction medium in the mixing zone of the reactor of at most 100 milliseconds; the precipitate is heated then brought into contact with a surfactant before being calcined.