Patents by Inventor Mathias Ibert

Mathias Ibert 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).

  • Patent number: 8399601
    Abstract: A method for preparing dialkyl carbonates of dianhydrohexitol, includes the following steps: (a) preparing an initial reaction mixture containing at least one dianhydrohexitol, at least two mole equivalents of a dialkyl carbonate of formula and a transesterification catalyst; (b) heating the reaction mixture to a temperature greater than or equal to the boiling temperature of the formed alcohol, or of the azeotrope thereof, in a reaction chamber preferably provided with a rectification column including a sufficient number of theoretical distillation plates to separate the resulting alcohol from the reaction mixture. Certain dialkyl carbonates of dianhydrohexitols produced by the method and the use thereof for synthesizing synthetic polymers are also described.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: March 19, 2013
    Assignee: Roquette Freres
    Inventors: Patrick Fuertes, Mathias Ibert, Emilie Josien, Pietro Tundo, Fabio Arico
  • Publication number: 20120041169
    Abstract: A method for preparing dialkyl carbonates of dianhydrohexitol, includes the following steps: (a) preparing an initial reaction mixture containing at least one dianhydrohexitol, at least two mole equivalents of a dialkyl carbonate of formula and a transesterification catalyst; (b) heating the reaction mixture to a temperature greater than or equal to the boiling temperature of the formed alcohol, or of the azeotrope thereof, in a reaction chamber preferably provided with a rectification column including a sufficient number of theoretical distillation plates to separate the resulting alcohol from the reaction mixture. Certain dialkyl carbonates of dianhydrohexitols produced by the method and the use thereof for synthesizing synthetic polymers are also described.
    Type: Application
    Filed: September 30, 2010
    Publication date: February 16, 2012
    Applicant: ROQUETTE FRERES
    Inventors: Patrick Fuertes, Mathias Ibert, Emilie Josien, Pietro Tundo, Fabio Arico
  • Patent number: 7728170
    Abstract: A method for preparing a polycarboxylic composition, includes a stage in which a monosaccharide composition undergoes an electrochemical oxidation treatment carried out in the absence of sodium hypochlorite and in the presence of a) an amine oxide and b) a carbon-based anode. Preferably, the anode is selected from the group comprising carbon felt and granular active carbon. The electrochemical oxidation treatment can be carried out advantageously at a pH, preferably of between 11.5 and 14. The method makes it possible to obtain novel products, especially 2-carboxy-2, 3, 4-trihydroxypentane-dioicious acid, the salts and derivatives thereof.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: June 1, 2010
    Assignee: Roquette Freres
    Inventors: Francis Marsais, Christian Feasson, Guy Queguiner, Mathias Ibert, Serge Comini, Jean-Marc Grossel
  • Publication number: 20050252785
    Abstract: A method for preparing a polycarboxylic composition, includes a stage in which a monosaccharide composition undergoes an electrochemical oxidation treatment carried out in the absence of sodium hypochlorite and in the presence of a) an amine oxide and b) a carbon-based anode. Preferably, the anode is selected from the group comprising carbon felt and granular active carbon. The electrochemical oxidation treatment can be carried out advantageously at a pH, preferably of between 11.5 and 14. The method makes it possible to obtain novel products, especially 2-carboxy-2,3,4-trihydroxypentane-dioicious acid, the salts and derivatives thereof.
    Type: Application
    Filed: September 12, 2003
    Publication date: November 17, 2005
    Inventors: Francis Marsais, Christian Feasson, Guy Queguiner, Mathias Ibert, Serge Comini, Jean-Marc Grossel