Patents by Inventor Stéphane Denaire

Stéphane Denaire has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • CERIUM-AND ZIRCONIUM-BASED MIXED OXIDES
    Publication number: 20190134608
    Abstract: Disclosed is a composition comprising at least a cerium and zirconium based mixed oxide comprising zirconium, cerium, lanthanum and optionally at least one rare earth other than cerium and lanthanum; said mixed oxide exhibiting a high thermal resistance and are in particular capable of maintaining a large specific surface area even in a high temperature environment. Also disclosed is a process for the synthesis of such compositions.
    Type: Application
    Filed: April 26, 2016
    Publication date: May 9, 2019
    Inventors: Simon IFRAH, Wie LI, Valérie BUISSETTE, Stéphane DENAIRE, Rui Miguel JORGE COELHO MARQUES
  • Composition containing oxides of zirconium, cerium and another rare earth having reduced maximum reducibility temperature, a process for preparation and use thereof in the field of catalysis
    Patent number: 8524183
    Abstract: A composition is described that includes oxides of zirconium, cerium and another rare earth different from cerium, having a cerium oxide content not exceeding 50 wt % and, after calcination at 1000° C. for 6 hours, a maximal reducibility temperature not exceeding 500° C. and a specific surface of at least 45 m2/g. The composition can be prepared according to a method that includes continuously reacting a mixture that includes compounds of zirconium, cerium and another rare earth having a basic compound for a residence time not exceeding 100 milliseconds, wherein the precipitate is heated and contacted with a surfactant before calcination.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: September 3, 2013
    Assignee: Rhodia Operations
    Inventors: Simon Ifrah, Emmanuel Rohart, Julien Hernandez, Stéphane Denaire
  • COMPOSITION CONTAINING OXIDES OF ZIRCONIUM, CERIUM AND ANOTHER RARE EARTH HAVING REDUCED MAXIMUM REDUCIBILITY TEMPERATURE, A PROCESS FOR PREPARATION AND USE THEREOF IN THE FIELD OF CATALYSIS
    Publication number: 20130052108
    Abstract: A composition is described that includes oxides of zirconium, cerium and another rare earth different from cerium, having a cerium oxide content not exceeding 50 wt % and, after calcination at 1000° C. for 6 hours, a maximal reducibility temperature not exceeding 500° C. and a specific surface of at least 45 m2/g. The composition can be prepared according to a method that includes continuously reacting a mixture that includes compounds of zirconium, cerium and another rare earth having a basic compound for a residence time not exceeding 100 milliseconds, wherein the precipitate is heated and contacted with a surfactant before calcination.
    Type: Application
    Filed: January 10, 2011
    Publication date: February 28, 2013
    Applicant: RHODIA OPERATIONS
    Inventors: Simon Ifrah, Emmanuel Rohart, Julien Hernandez, Stéphane Denaire