Patents by Inventor Daniel Nivert

Daniel Nivert 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).

  • Method of recycling a catalyst in a reaction involving the direct oxidation of cyclohexane into adipic acid
    Patent number: 5756837
    Abstract: A process for recycling a catalyst containing cobalt including treating a reaction mixture obtained during the direct oxidation of cyclohexane to adipic acid by extracting at least some of the glutaric acid and succinic acid which are formed in the reaction.
    Type: Grant
    Filed: February 26, 1997
    Date of Patent: May 26, 1998
    Assignee: Rhone-Poulenc Fiber & Resin Intermediates
    Inventors: Michel Costantini, Eric Fache, Daniel Nivert