Patents by Inventor Francois Bleger

Francois Bleger 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).

  • Process of preparation of glyoxylic acid aqueous solution
    Patent number: 8754255
    Abstract: The invention relates to a method for preparing an aqueous solution of glyoxylic acid by oxidation of an aqueous solution of glyoxal with oxygen or a gas containing oxygen, in the presence of a catalytic quantity of nitric acid and/or at least one nitrogen oxide, a strong acid not oxidizing glyoxal, and by maintaining conditions satisfying the equation KLa/Q>10, where KLa is the total volumetric mass transfer coefficient and Q is the heat load liberated by the reaction per mole of glyoxal.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: June 17, 2014
    Assignee: Clariant Specialty Fine Chemicals (France)
    Inventors: François Bleger, Olivier Simon, Alain Schouteeten
  • Process Of Preparation Of Glyoxylic Acid Aqueous Solution
    Publication number: 20110012056
    Abstract: The invention relates to a method for preparing an aqueous solution of glyoxylic acid by oxidation of an aqueous solution of glyoxal with oxygen or a gas containing oxygen, in the presence of a catalytic quantity of nitric acid and/or at least one nitrogen oxide, a strong acid not oxidizing glyoxal, and by maintaining conditions satisfying the equation KLa/Q>10, where KLa is the total volumetric mass transfer coefficient and Q is the heat load liberated by the reaction per mole of glyoxal.
    Type: Application
    Filed: January 21, 2009
    Publication date: January 20, 2011
    Applicant: CLARIANT SPECIALTY FINE CHEMICALS (FRANCE)
    Inventors: Francois Bleger, Olivier Simon, Alain Schouteeten
  • Process for the preparation of n-alkyl-2(hydroxy-4benzoyl)-3 benzofurans and intermediates thereof
    Patent number: 7544817
    Abstract: Process for the preparation of a 2-(n-alkyl)-3-(4-hydroxybenzoyl)benzofuran of formula (I) in which R represents a linear or branched alkyl radical including from 1 to 5 carbon atoms and R1 represents a linear or branched alkyl radical including from 1 to 3 carbon atoms, a linear or branched alkoxy radical including from 1 to 3 carbon atoms, a halogen atom or a nitro radical, and intermediates.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: June 9, 2009
    Assignee: Clariant (France)
    Inventors: Alain Schouteeten, François Bleger, Françoise Mordacq, Jérôme Piron
  • Process for the preparation of n-alkyl-2(hydroxy-4 benzoyl)-3 benzofurans and its intermediates thereof
    Publication number: 20070155831
    Abstract: Process for the preparation of a 2-(n-alkyl)-3-(4-hydroxybenzoyl)benzofuran of formula (I) in which R represents a linear or branched alkyl radical including from 1 to 5 carbon atoms and R1 represents a linear or branched alkyl radical including from 1 to 3 carbon atoms, a linear or branched alkoxy radical including from 1 to 3 carbon atoms, a halogen atom or a nitro radical, and intermediates.
    Type: Application
    Filed: December 15, 2004
    Publication date: July 5, 2007
    Inventors: Alain Shoutteeten, Francois Bleger, Francoise Mordacq, Jerome Piron
  • Process for the separation, by countercurrentwise liquid-liquid extraction, of a glyoxal diacetal from a crude mixture comprising it
    Publication number: 20070073088
    Abstract: The invention relates to a method for separating a diacetal of the glyoxal of a raw mixture comprising said diacetal of the glyoxal and a monoacetal of the glyoxal, by means of counter-current liquid-liquid extraction.
    Type: Application
    Filed: May 18, 2004
    Publication date: March 29, 2007
    Applicant: Clariant (FRANCE)
    Inventors: Olivier Simon, Francois Bleger, Alain Schouteeten