Patents by Inventor Michel Petit-Conil

Michel Petit-Conil 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).

  • Publication number: 20220220285
    Abstract: A method for manufacturing a suspension of cellulose nanofibrils from an aqueous suspension of cellulose fibres is disclosed including the following steps: chemical treatment, in a reactor, of the aqueous suspension of cellulose fibres by at least one functionalising agent, the chemical treatment being configured to functionalise the cellulose fibres at a modification rate that is higher, indeed strictly higher, than 1.0 mmol/g, and mechanical treatment, in a twin-screw extruder, of the aqueous suspension of functionalised cellulose fibres, each screw of the extruder comprising at least two fibrillation segments. In accordance with at least one embodiment, this method makes it possible to produce a suspension of cellulose nanofibrils of good quality, with a high dry matter content, and while consuming less energy than the methods of the prior art.
    Type: Application
    Filed: May 4, 2020
    Publication date: July 14, 2022
    Inventors: Julien BRAS, Fleur ROL, Michel PETIT-CONIL, Valérie MEYER
  • Patent number: 11384480
    Abstract: The present invention relates to a method for bleaching an unbleached or pre-bleached paper pulp comprising at least the following consecutive steps: a) preparing an unbleached or pre-bleached paper pulp having a pH of at least 8, b) bringing the paper pulp obtained at the end of step a) into contact with chlorine dioxide, c) when the pH of the paper pulp obtained from step b) is lower than 10, adding at least one Brønsted base to the paper pulp, d) adding hydrogen peroxide to the paper pulp obtained at the end of step c), e) maintaining the paper pulp obtained at the end of step d) in a first bleaching tower, f) optionally, adding sulphuric acid to the paper pulp obtained at the end of step e) and maintaining the obtained paper pulp in a second bleaching tower, the method dispensing with the need for a step of washing the paper pulp before the end of step e), and, if applicable, before the end of step f).
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: July 12, 2022
    Assignees: CENTRE TECHNIQUE DE L'INDUSTRIE DES PAPIERS, CARTONS ET CELLULOSES, INSTITUT POLYTECHNIQUE DE GRENOBLE
    Inventors: Gerard Mortha, Jennifer Marcon, Nathalie Marlin, Auphelia Burnet, Michel Petit-Conil
  • Publication number: 20190345672
    Abstract: The present invention relates to a method for bleaching an unbleached or pre-bleached paper pulp comprising at least the following consecutive steps: a) preparing an unbleached or pre-bleached paper pulp having a pH of at least 8, b) bringing the paper pulp obtained at the end of step a) into contact with chlorine dioxide, c) when the pH of the paper pulp obtained from step b) is lower than 10, adding at least one Brønsted base to the paper pulp, d) adding hydrogen peroxide to the paper pulp obtained at the end of step c), e) maintaining the paper pulp obtained at the end of step d) in a first bleaching tower, f) optionally, adding sulphuric acid to the paper pulp obtained at the end of step e) and maintaining the obtained paper pulp in a second bleaching tower, the method dispensing with the need for a step of washing the paper pulp before the end of step e), and, if applicable, before the end of step f).
    Type: Application
    Filed: January 18, 2018
    Publication date: November 14, 2019
    Inventors: Gerard MORTHA, Jennifer MARCON, Nathalie MARLIN, Auphelia BURNET, Michel PETIT-CONIL
  • Patent number: 9834886
    Abstract: A method for producing mechanical paper pulp comprises: impregnating unprocessed wood, whereby unprocessed wood is exposed to an impregnating composition comprising at least a laccase enzyme and a formula mediator (I), wherein R1 and R2 are identical or different groups, chosen from among a hydrogen atom, a hydrocarbon chain, linear or branched, saturated or unsaturated, comprising 1 to 14 carbon atoms, wherein each hydrocarbon chain can be replaced by one or more functional groups chosen from among —OH, —SO3, benzyl, amino, mercapto, keto or carboxyl, wherein R1 and R2 in combination can form a cyclical structure, to achieve impregnation of the wood; and mechanically refining the impregnated wood, such that a mechanical paper pulp is obtained. The disclosure also relates to an impregnating composition used in this method and to the use thereof in a method for producing mechanical paper pulp, as well as to a method for producing paper.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: December 5, 2017
    Assignee: ARKEMA FRANCE
    Inventors: Jérôme Blanc, Christophe Calais, Valérie Meyer, Michel Petit-Conil
  • Patent number: 8945347
    Abstract: A method of producing hardwood pulp is provided. This method comprises treating hardwood chips with one or more than one Family 11 xylanase enzyme in the absence of adding an oxidizing enzyme for about 5 minutes to about 120 minutes, to produce a treated chip mixture. The treated chip mixture is then mechanically refined to produce the hardwood pulp.
    Type: Grant
    Filed: May 3, 2005
    Date of Patent: February 3, 2015
    Assignee: Centre Technique de l'Industrie des Papiers, Cartons et Celluloses
    Inventors: Michel Petit-Conil, J. Mark A. Hoddenbagh, Jeffrey S. Tolan
  • Publication number: 20140231034
    Abstract: A method for producing mechanical paper pulp comprises: impregnating unprocessed wood, whereby unprocessed wood is exposed to an impregnating composition comprising at least a laccase enzyme and a formula mediator (I), wherein R1 and R2 are identical or different groups, chosen from among a hydrogen atom, a hydrocarbon chain, linear or branched, saturated or unsaturated, comprising 1 to 14 carbon atoms, wherein each hydrocarbon chain can be replaced by one or more functional groups chosen from among —OH, —SO3, benzyl, amino, mercapto, keto or carboxyl, wherein R1 and R2 in combination can form a cyclical structure, to achieve impregnation of the wood; and mechanically refining the impregnated wood, such that a mechanical paper pulp is obtained. The disclosure also relates to an impregnating composition used in this method and to the use thereof in a method for producing mechanical paper pulp, as well as to a method for producing paper.
    Type: Application
    Filed: September 6, 2012
    Publication date: August 21, 2014
    Applicant: ARKEMA FRANCE
    Inventors: Jérôme Blanc, Christophe Calais, Valérie Meyer, Michel Petit-Conil
  • Publication number: 20130066116
    Abstract: The present invention relates to a method for the depolymerization of lignin or of derivatives thereof, including a step of heating the lignin or the derivatives thereof in the presence of a hydroxide of general formula M(OH)n or of a mixture of M(OH)n hydroxides, where M is a metal of the alkali or alkaline-earth family and n is equal to 1 or 2, and where the mass ratio between said hydroxide or mixture of hydroxides and the lignin or the derivatives thereof is comprised between around 0.5 and around 20.
    Type: Application
    Filed: March 17, 2011
    Publication date: March 14, 2013
    Applicant: INSTITUT TECHNOLOGIQUE FCBA
    Inventors: Frédéric Goettmann, Philippe Makowski, Denilson Da Silva Perez, Michel Petit-Conil
  • Publication number: 20090107643
    Abstract: A method of producing hardwood pulp is provided. This method comprises treating hardwood chips with one or more than one Family 11 xylanase enzyme in the absence of adding an oxidizing enzyme for about 5 minutes to about 120 minutes, to produce a treated chip mixture. The treated chip mixture is then mechanically refined to produce the hardwood pulp.
    Type: Application
    Filed: May 3, 2005
    Publication date: April 30, 2009
    Inventors: Michel Petit-Conil, J. Mark A. Hoddenbagh, Jeffrey S. Tolan