Patents by Inventor Patrice Gotteland

Patrice Gotteland 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).

  • Selective separation of iron by treatment with an ion-exchanging resin comprising diphosphonic acid groups
    Patent number: 7045656
    Abstract: A process is described for recycling catalysts in the reaction for the oxidation of alcohols and/or ketones to carboxylic acids and more particularly the oxidation of cyclic alcohols and/or cyclic ketones to dicarboxylic acids, such as the oxidation of cyclohexanol and/or cyclohexanone to adipic acid. This process involves treating the solution comprising the oxidation catalyst, before it is recycled, with an ion-exchange resin which makes it possible to selectively separate the iron from the other metal elements, in particular from copper and from vanadium.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: May 16, 2006
    Assignee: Rhodia Fiber & Resin Intermediates
    Inventors: Patrice Gotteland, Sébastien Logette
  • Selective separation of iron by treatment with an ion-exchanging resin comprising diphosphonic acid groups
    Patent number: 6872369
    Abstract: The invention relates to a process for selectively separating iron from other metal ions, in particular ions present in certain oxidation catalysts. It also relates to a process for recycling catalysts in the reaction for the oxidation of alcohols and/or ketones to carboxylic acids and more particularly the oxidation of cyclic alcohols and/or cyclic ketones to dicarboxylic acids, such as the oxidation of cyclohexanol and/or cyclohexanone to adipic acid. This process consists in treating the solution comprising the oxidation catalyst, before it is recycled, with an ion-exchange resin which makes it possible to selectively separate the iron from the other metal elements, in particular from copper and from vanadium.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: March 29, 2005
    Assignee: Rhodia Fiber and Resin Intermediates
    Inventors: Patrice Gotteland, Sébastien Logette
  • Selective separation of iron by treatment with an ion-exchanging resin comprising diphosphonic acid groups
    Publication number: 20040213718
    Abstract: The invention relates to a process for selectively separating iron from other metal ions, in particular ions present in certain oxidation catalysts.
    Type: Application
    Filed: May 17, 2004
    Publication date: October 28, 2004
    Applicant: RHODIA FIBER AND RESIN INTERMEDIATES
    Inventors: Patrice Gotteland, Sebastien Logette