Patents by Inventor Alain Perrard

Alain Perrard 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: 9321783
    Abstract: A method for preparing a dialkyloxydianhyrohexitol (dimethylisosorbide) composition by etherification of dianhydrohexitol (isosorbide). The aim is to achieve a “clean” method that avoids the use of a methylation agent such as dimethyl sulfate or methyl chloride, which generates stoechiometric quantities of salts, or expensive dialkyl-carbonates, wherein only one of the two methyl groups participates in the preparation of mixed isosorbide ethers. The method involves using at least one O-alkylation agent and a catalyst including an acid or an acid salt, preferably a catalyst having Lewis or BrØnsted acid properties. A device for carrying out the method wherein the device includes a vaporization oven and a reaction oven is also described.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: April 26, 2016
    Assignees: ROQUETTE FRERES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE-CNRS, UNIVERSITE CLAUDE BERNARD LYON 1
    Inventors: Mathias Ibert, Nadine Essayem, Cyril Feche, Alain Perrard
  • Publication number: 20150203507
    Abstract: A method for preparing a dialkyloxydianhyrohexitol (dimethylisosorbide) composition by etherification of dianhydrohexitol (isosorbide). The aim is to achieve a “clean” method that avoids the use of a methylation agent such as dimethyl sulfate or methyl chloride, which generates stoechiometric quantities of salts, or expensive dialkyl-carbonates, wherein only one of the two methyl groups participates in the preparation of mixed isosorbide ethers. The method involves using at least one O-alkylation agent and a catalyst including an acid or an acid salt, preferably a catalyst having Lewis or BrØnsted acid properties. A device for carrying out the method wherein the device includes a vaporization oven and a reaction oven is also described.
    Type: Application
    Filed: August 5, 2013
    Publication date: July 23, 2015
    Inventors: Mathias Ibert, Nadine Essayem, Cyril Feche, Alain Perrard
  • Patent number: 6383972
    Abstract: A carbon fiber fabric having large specific surface area is made using a rayon precursor, and a catalyst is fixed on the fabric by impregnation or by cationic exchange. The carbon fiber fabric has pores with a mean size lying in the range 0.3 nm to 3 nm, a carbon content greater than 99%, and a high density of functional groups per unit area which favors the dispersion of metal catalyst in the form of fine particles and which is good for highly selective catalytic reactions in fine chemistry.
    Type: Grant
    Filed: May 23, 2000
    Date of Patent: May 7, 2002
    Assignee: Messier-Bugatti
    Inventors: Philippe Parmentier, Jean-Pierre Joly, Alain Perrard
  • Patent number: 5773632
    Abstract: A process for the preparation of the enol lactone of 2-oxocyclohexylidene acetic acid wherein(i) glyoxylic acid is allowed to react with cyclohexanone in the presence of a halogen acid in order to obtain a crude reaction product B1, then(ii) said crude reaction product B1 is allowed to react, after solubilisation in an organic solvent, in the presence of a strong acid soluble in said organic solvent or of strongly acid resins, in order to obtain the enol lactone of 2-oxocyclohexylidene acetic acid which is isolated if desired,and application to the preparation of 2-coumaranone.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: June 30, 1998
    Assignee: Clariant Chimie S.A.
    Inventors: Nathalie Carmona, Laurent Carmona, Alain Perrard, Jean-Claude Vallejos
  • Patent number: 5616733
    Abstract: Preparation process for 2-coumaranone in which glyoxylic acid, in vapor phase, is reacted with cyclohexanone, in the presence of a dehydrogenation catalyst.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 1, 1997
    Assignee: Societe Francaise Hoechst
    Inventors: Jean-Claude Vallejos, Alain Perrard, Yani Christidis, Pierre Gallezot