Patents by Inventor Pierre Coqueret

Pierre Coqueret 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: 10503383
    Abstract: A method for controlling an operating parameter of an acoustic apparatus, including implementing a screen displaying at least one window including a cursor able to occupy positions relative to a reference of the window, the positions representing values of the operating parameter between a minimal and a maximal value, displaying the cursor in an initial position relative to the reference representative of an initial value of the operating parameter, acquiring an elementary command from an operator, moving the cursor with respect to the reference as a function of the elementary command, from the initial position to a final position in order to select a final value of the operating parameter in a range of selectable values containing the initial value, and sending the selected value to the acoustic apparatus, wherein the range of selectable values has an amplitude strictly less than the difference between the maximum and the minimum values.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: December 10, 2019
    Assignee: DEVIALET
    Inventors: Charles Coqueret, Maxime Leblanc, Pierre-Emmanuel Calmel
  • Patent number: 8231765
    Abstract: A method and a plant are disclosed for purifying lactams, particularly lactams obtained by cyclizing hydrolysis of aminonitrile. The purification of ?-caprolactam obtained by cyclizing hydrolysis of aminocapronitrile is described which includes eliminating the ammonia from the reaction medium of the hydrolysis, then recovering the lactam from the medium in purified form. The recovery is carried out by performing at least a distillation of the lactam in the presence of a base producing optionally a fronts fraction having compounds more volatile than the lactam, a fraction having the lactam to be recovered to the degree of desired purity and a distillation tails having the lactam and compounds less volatile than the lactam. The distillation tails are treated by various processes such as evaporation in thin layers to recover the major part of the caprolactam and recycling the latter in the purification process.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: July 31, 2012
    Assignee: Rhodia Polyamide Intermediates
    Inventors: Daniel Amoros, Philippe Leconte, Pierre Coqueret
  • Publication number: 20080230368
    Abstract: A method and a plant are disclosed for purifying lactams, particularly lactams obtained by cyclizing hydrolysis of aminonitrile. The purification of ?-caprolactam obtained by cyclizing hydrolysis of aminocapronitrile is described which includes eliminating the ammonia from the reaction medium of the hydrolysis, then recovering the lactam from said medium in purified form. The recovery is carried out by performing at least a distillation of the lactam in the presence of a base producing optionally a fronts fraction comprising compounds more volatile than the lactam, a fraction comprising the lactam to be recovered to the degree of desired purity and a distillation tails comprising the lactam and compounds less volatile than the lactam. The distillation tails are treated by various processes such as evaporation in thin layers to recover the major part of the caprolactam and recycling the latter in the purification process.
    Type: Application
    Filed: May 29, 2008
    Publication date: September 25, 2008
    Applicant: RHODIA POLYAMIDE INTERMEDIATES
    Inventors: Daniel Amoros, Philippe Leconte, Pierre Coqueret
  • Patent number: 7384518
    Abstract: A method and a plant are disclosed for purifying lactams, particularly lactams obtained by cyclizing hydrolysis of aminonitrile. The purification of ?-caprolactam obtained by cyclizing hydrolysis of aminocapronitrile is described which includes eliminating the ammonia from the reaction medium of the hydrolysis, then recovering the lactam from said medium in purified form. The recovery is carried out by performing at least a distillation of the lactam in the presence of a base producing optionally a fronts fraction comprising compounds more volatile than the lactam, a fraction comprising the lactam to be recovered to the degree of desired purity and a distillation tails comprising the lactam and compounds less volatile than the lactam. The distillation tails are treated by various processes such as evaporation in thin layers to recover the major part of the caprolactam and recycling the latter in the purification process.
    Type: Grant
    Filed: May 28, 2001
    Date of Patent: June 10, 2008
    Assignee: Rhodia Polyamide Intermediates
    Inventors: Daniel Amoros, Philippe Leconte, Pierre Coqueret
  • Patent number: 6884751
    Abstract: Hydrocyanation catalysts comprising aqueous solutions of at least one water-soluble phosphine and nickel values, well suited for the hydrocyanation of ethylenically unsaturated organic compounds such as diolefins, olefinic nitrites and monolefins, are produced by (a) admixing an aqueous solution of such at least one water-soluble phosphine with a nickel hydroxide, (b) adding hydrogen cyanide or a compound which generates hydrogen cyanide to the mixture thus formed, (c) stirring the resulting mixture until the nickel values have at least partially dissolved, and (d) reducing at least a portion of said nickel values having an oxidation state of greater than zero to the zero oxidation state.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: April 26, 2005
    Assignee: Rhodia Feber & Resin Intermedaites
    Inventors: Paolo Burattin, Pierre Coqueret, Marc Huser
  • Publication number: 20040014965
    Abstract: The invention concerns a method for purifying lactams, more particularly lactams obtained by cyclizing hydrolysis of aminonitrile. More particularly, the invention concerns the purification of &egr;-caprolactam obtained by cyclizing hydrolysis of aminocapronitrile which consists in eliminating the ammonia from the reaction medium of the hydrolysis then in recuperating the lactam from said medium in purified form. Said recuperation is carried out by performing at least a distillation of the lactam in the presence of a base producing optionally a fronts fraction comprising compounds more volatile than the lactam, a fraction comprising the lactam to be recuperated to the degree of desired purity and a distillation tails comprising the lactam and compounds less volatile than the lactam. The distillation tails are treated by various processes such as evaporation in thin layers to recuperate the major part of the comprised caprolactam and recycling the latter in the purification process.
    Type: Application
    Filed: July 30, 2003
    Publication date: January 22, 2004
    Inventors: Daniel Amoros, Philippe Leconte, Pierre Coqueret
  • Publication number: 20030204109
    Abstract: Water-soluble sulfonated organophosphorus compounds are purified by at least partially removing contaminating sulfite values therefrom, by decreasing the pH of a solution of such sulfonated organophosphorus compounds to a value of less than or equal to 4, and maintaining the pH of the solution at this value of 4 or less for such period of time as to reduce the weight concentration of sulfite in the solution to less than 100 ppm; the organophosphorus compounds thus purified are well suited for the two-phase cocatalysis of a wide variety of organic reactions.
    Type: Application
    Filed: April 22, 2003
    Publication date: October 30, 2003
    Applicants: RHODIA FIBER, RESIN INTERMEDIATES
    Inventors: Larbi Aouni, Paolo Burattin, Pierre Coqueret, Marc Huser
  • Patent number: 6613939
    Abstract: Water-soluble sulfonated organophosphorus compounds are purified by at least partially removing contaminating sulfite values therefrom, by decreasing the pH of a solution of such sulfonated organophosphorus compounds to a value of less than or equal to 4, and maintaining the pH of the solution at this value of 4 or less for such period of time as to reduce the weight concentration of sulfite in the solution to less than 100 ppm; the organophosphorus compounds thus purified are well suited for the two-phase cocatalysis of a wide variety of organic reactions.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: September 2, 2003
    Assignee: Rhodia Fiber & Resin Intermediates
    Inventors: Larbi Aouni, Paolo Burattin, Pierre Coqueret, Marc Huser
  • Patent number: 6469194
    Abstract: Ethylenically unsaturated organic compounds, for example diolefins, olefinic nitriles and monoolefins, are noncontaminatingly hydrocyanated into corresponding nitriles by (a) reacting such ethylenically unsaturated organic compounds with hydrogen cyanide in the presence of an aqueous solution containing a catalytically effective amount of a catalyst which comprises at least one nickel compound and at least one water-soluble phosphine, (b) thereafter separating the organic phase from the aqueous phase which result, the separated aqueous phase comprising a solid phase formed during hydrocyanation, and (c) thence treating the separated aqueous phase, or a solid phase removed therefrom, with hydrogen cyanide to thus at least partially dissolve said solid phase contained therein or removed therefrom.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: October 22, 2002
    Assignee: Rhodia Fiber & Resin Intermediates
    Inventors: Paolo Burattin, Pierre Coqueret, Marc Huser
  • Publication number: 20020026066
    Abstract: Hydrocyanation catalysts comprising aqueous solutions of at least one water-soluble phosphine and nickel values, well suited for the hydrocyanation of ethylenically unsaturated organic compounds such as diolefins, olefinic nitrites and monolefins, are produced by (a) admixing an aqueous solution of such at least one water-soluble phosphine with a nickel hydroxide, (b) adding hydrogen cyanide or a compound which generates hydrogen cyanide to the mixture thus formed, (c) stirring the resulting mixture until the nickel values have at least partially dissolved, and (d) reducing at least a portion of said nickel values having an oxidation state of greater than zero to the zero oxidation state.
    Type: Application
    Filed: June 22, 2001
    Publication date: February 28, 2002
    Inventors: Paolo Burattin, Pierre Coqueret, Marc Huser
  • Publication number: 20020022736
    Abstract: Ethylenically unsaturated organic compounds, for example diolefins, olefinic nitrites and monoolefins, are noncontaminatingly hydrocyanated into corresponding nitrites by (a) reacting such ethylenically unsaturated organic compounds with hydrogen cyanide in the presence of an aqueous solution containing a catalytically effective amount of a catalyst which comprises at least one nickel compound and at least one water-soluble phosphine, (b) thereafter separating the organic phase from the aqueous phase which result, the separated aqueous phase comprising a solid phase formed during hydrocyanation, and (c) thence treating the separated aqueous phase, or a solid phase removed therefrom, with hydrogen cyanide to thus at least partially dissolve said solid phase contained therein or removed therefrom.
    Type: Application
    Filed: June 22, 2001
    Publication date: February 21, 2002
    Inventors: Paolo Burattin, Pierre Coqueret, Marc Huser
  • Publication number: 20020016497
    Abstract: Water-soluble sulfonated organophosphorus compounds are purified by at least partially removing contaminating sulfite values therefrom, by decreasing the pH of a solution of such sulfonated organophosphorus compounds to a value of less than or equal to 4, and maintaining the pH of the solution at this value of 4 or less for such period of time as to reduce the weight concentration of sulfite in the solution to less than 100 ppm; the organophosphorus compounds thus purified are well suited for the two-phase cocatalysis of a wide variety of organic reactions.
    Type: Application
    Filed: June 25, 2001
    Publication date: February 7, 2002
    Inventors: Larbi Aouni, Paolo Burattin, Pierre Coqueret, Marc Huser