Patents by Inventor Michel Devic

Michel Devic 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: 9758451
    Abstract: A subject-matter of the invention is a process for the preparation of 2,3,3,3-tetrafluoro-1-propene which comprises the following stages: (i) hydrogenation of hexafluoropropylene to give 1,1,1,2,3,3-hexafluoropropane; (ii) dehydrofluorination of the 1,1,1,2,3,3-hexafluoropropane obtained in the preceding stage to give 1,2,3,3,3-pentafluoro-1-propene; (iii) hydrogenation of the 1,2,3,3,3-pentafluoro-1-propene obtained in the preceding stage to give 1,1,1,2,3-pentafluoropropane; and (iv) dehydrofluorination of the 1,1,1,2,3-pentafluoropropane obtained in the preceding stage to give 2,3,3,3-tetrafluoro-1-propene. Stages (ii) and (iv) are carried out using a water and potassium hydroxide mixture with the potassium hydroxide representing between 58 and 86% by weight of the mixture and at a temperature of between 110 and 180° C.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: September 12, 2017
    Assignee: Arkema France
    Inventors: Anne Pigamo, Michel Devic, Laurent Wendlinger
  • Publication number: 20160107959
    Abstract: A subject-matter of the invention is a process for the preparation of 2,3,3,3-tetrafluoro-1-propene which comprises the following stages: (i) hydrogenation of hexafluoropropylene to give 1,1,1,2,3,3-hexafluoropropane; (ii) dehydrofluorination of the 1,1,1,2,3,3-hexafluoropropane obtained in the preceding stage to give 1,2,3,3,3-pentafluoro-1-propene; (iii) hydrogenation of the 1,2,3,3,3-pentafluoro-1-propene obtained in the preceding stage to give 1,1,1,2,3-pentafluoropropane; and (iv) dehydrofluorination of the 1,1,1,2,3-pentafluoropropane obtained in the preceding stage to give 2,3,3,3-tetrafluoro-1-propene. Stages (ii) and (iv) are carried out using a water and potassium hydroxide mixture with the potassium hydroxide representing between 58 and 86% by weight of the mixture and at a temperature of between 110 and 180° C.
    Type: Application
    Filed: December 22, 2015
    Publication date: April 21, 2016
    Inventors: Anne PIGAMO, Michel DEVIC, Laurent WENDLINGER
  • Patent number: 9255047
    Abstract: A subject-matter of the invention is a process for the preparation of 2,3,3,3-tetrafluoro-1-propene which comprises the following stages: (i) hydrogenation of hexafluoropropylene to give 1,1,1,2,3,3-hexafluoropropane; (ii) dehydrofluorination of the 1,1,1,2,3,3-hexafluoropropane obtained in the preceding stage to give 1,2,3,3,3-pentafluoro-1-propene; (iii) hydrogenation of the 1,2,3,3,3-pentafluoro-1-propene obtained in the preceding stage to give 1,1,1,2,3-pentafluoropropane; and (iv) dehydrofluorination of the 1,1,1,2,3-pentafluoropropane obtained in the preceding stage to give 2,3,3,3-tetrafluoro-1-propene. Stages (ii) and (iv) are carried out using a water and potassium hydroxide mixture with the potassium hydroxide representing between 58 and 86% by weight of the mixture and at a temperature of between 110 and 180° C.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: February 9, 2016
    Assignee: Arkema France
    Inventors: Anne Pigamo, Michel Devic, Laurent Wendlinger
  • Patent number: 8946493
    Abstract: The present invention relates to a method for producing 1,2,3,3,3-pentafluoropropane, involving reacting gaseous phase 1,2,3,3,3-pentafluoropropene with hydrogen in a superstoichimetric amount in the presence of a hydrogenation catalyst in a reactor, and recirculating a part of the gaseous effluent from the reactor.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: February 3, 2015
    Assignee: Arkema France
    Inventors: Michel Devic, Nicolas Doucet, Laurent Wendlinger, Geraldine Cavallini
  • Patent number: 8912370
    Abstract: The present invention relates to a method for producing 1,1,1,2,3,3-hexaafluoropropane, involving reacting gaseous phase hexafluoropropene with hydrogen in a superstoichimetric amount in the presence of a hydrogenation catalyst in a reactor, and recirculating a part of the gaseous effluent from the reactor.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: December 16, 2014
    Assignee: Arkema France
    Inventors: Michel Devic, Nicolas Doucet, Laurent Wendlinger, Geraldine Cavallini
  • Patent number: 8841493
    Abstract: The subject matter of the invention is a process for preparing fluoroolefin compounds. The invention relates more particularly to a process for producing a (hydro)fluoroolefin compound, which comprises (i) bringing at least one compound comprising from three to six carbon atoms, at least two fluorine atoms and at least one hydrogen atom, on the condition that at least one hydrogen atom and one fluorine atom are located on adjacent carbon atoms, into contact with a solid reactant comprising calcium hydroxide.
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: September 23, 2014
    Assignee: Arkema France
    Inventors: Dominique Guillet, Michel Devic
  • Patent number: 8779217
    Abstract: The invention relates to a method for preparing fluoropropenes of formula (I) CF3CF?CHR, where R is a hydrogen or a fluorine atom from at least one compound of formula (Ia) CF3CF?CFR, where R has the same meaning as in formula (I), said method including the following steps: (i) hydrogenating at least one compound of formula (Ia) in an adiabatic reactor in the presence of a catalyst with a superstoichiometric amount of hydrogen so as to produce a hydrofluoropropane; (ii) partially condensing the flow from the adiabatic reactor of step (i) so as to produce a gaseous phase fraction, including unreacted hydrogen and a portion of the formed hydrofluoropropane, which is recirculated to step (i), and a liquid phase fraction including the residue of the hydrofluoropropane; (iii) dehydrofluorinating hydrofluoropropane from the liquid fraction of step (ii) using potassium hydroxide in an aqueous reaction medium contained in an agitated reactor so as to produce the fluoropropene of formula (I); and (iv) purifying the fl
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: July 15, 2014
    Assignee: Arkema France
    Inventors: Michel Devic, Nicolas Doucet, Laurent Wendlinger, Geraldine Cavallini, Pierre-Marie Sedat, Karine Avril
  • Patent number: 8680346
    Abstract: The subject of the invention is a process for the preparation of 2,3-dichloro-1,1,1-trifluoropropane by chlorination of 3,3,3-trifluoropropene at a pressure greater than 2 bar. Application in the synthesis of 1234yf.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: March 25, 2014
    Assignee: Arkema France
    Inventors: Anne Pigamo, Michel Devic, Laurent Wendlinger
  • Patent number: 8536386
    Abstract: A subject-matter of the invention is a process for the preparation of fluoroolefin compounds. It relates more particularly to a process for the manufacture of a compound of formula (I) CF3—CF?CHX in which X represents a hydrogen or fluorine atom, comprising at least one stage of dehydrofluorination of a compound of formula (II) CF3—CHF—CHFX during which the compound of formula (II) is brought into contact with a mixture composed of water and of potassium hydroxide in which the potassium hydroxide is present in an amount of between 58 and 86% by weight.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: September 17, 2013
    Assignee: Arkema France
    Inventors: Anne Pigamo, Michel Devic, Laurent Wendlinger
  • Patent number: 8329964
    Abstract: The invention relates to a gas-phase continuous method for preparing 2,3,3,3-tetrafluoro-1-propene, said method comprising the following steps: (i) hydrogenation of hexafluoropropylene to form 1,1,1,2,3,3-hexafluoropropane; (ii) dehydrofluorination of the 1,1,1,2,3,3-hexafluoropropane obtained in the previous step to 1,2,3,3,3-pentafluoropropene-1; (iii) hydrogenation of the 1,2,3,3,3-pentafluoropropene-1 obtained in the previous step to form 1,1,1,2,3-pentafluoropropane; and (iv) dehydrofluorination of the 1,1,1,2,3-pentafluoropropane obtained in the previous step to form 2,3,3,3-tetrafluoro-1-propene.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: December 11, 2012
    Assignee: Arkema France
    Inventors: Michel Devic, Dominique Guillet, Emmanuel Guiraud, Laurent Wendlinger
  • Patent number: 8252964
    Abstract: The subject of the invention is a process for the purification of 2,3,3,3-tetrafluoro-1-propene (HFO-1234yf). More particularly, it relates to a purification process in which 2,3,3,3-tetrafluoro-1-propene, comprising impurities based on halogen compounds, is brought into contact with an adsorbent, preferably molecular sieves and advantageously molecular sieves having a pore opening with an average diameter between 5 and 11 ?, preferably between 5 and 9 ?.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: August 28, 2012
    Assignee: Arkema France
    Inventors: Michel Devic, Anne Pigamo, Laurent Wendlinger
  • Publication number: 20120136183
    Abstract: The invention relates to a method for preparing fluoropropenes of formula (I) CF3CF?CHR, where R is a hydrogen or a fluorine atom from at least one compound of formula (Ia) CF3CF?CFR, where R has the same meaning as in formula (I), said method including the following steps: (i) hydrogenating at least one compound of formula (Ia) in an adiabatic reactor in the presence of a catalyst with a superstoichiometric amount of hydrogen so as to produce a hydrofluoropropane; (ii) partially condensing the flow from the adiabatic reactor of step (i) so as to produce a gaseous phase fraction, including unreacted hydrogen and a portion of the formed hydrofluoropropane, which is recirculated to step (i), and a liquid phase fraction including the residue of the hydrofluoropropane; (iii) dehydrofluorinating hydrofluoropropane from the liquid fraction of step (ii) using potassium hydroxide in an aqueous reaction medium contained in an agitated reactor so as to produce the fluoropropene of formula (I); and (iv) purifying the fl
    Type: Application
    Filed: May 21, 2010
    Publication date: May 31, 2012
    Applicant: Arkema France
    Inventors: Michel Devic, Nicolas Doucet, Laurent Wendlinger, Geraldine Cavallini, Pierre-Marie Sedat, Karine Avril
  • Publication number: 20120101314
    Abstract: The present invention relates to a method for producing 1,1,1,2,3,3-hexaafluoropropane, involving reacting gaseous phase hexafluoropropene with hydrogen in a superstoichimetric amount in the presence of a hydrogenation catalyst in a reactor, and recirculating a part of the gaseous effluent from the reactor.
    Type: Application
    Filed: May 5, 2010
    Publication date: April 26, 2012
    Applicant: Arkema France
    Inventors: Michel Devic, Nicolas Doucet, Laurent Wendlinger, Geraldine Cavallini
  • Publication number: 20120101315
    Abstract: The present invention relates to a method for producing 1,2,3,3,3-pentafluoropropane, involving reacting gaseous phase 1,2,3,3,3-pentafluoropropene with hydrogen in a superstoichimetric amount in the presence of a hydrogenation catalyst in a reactor, and recirculating a part of the gaseous effluent from the reactor.
    Type: Application
    Filed: May 6, 2010
    Publication date: April 26, 2012
    Applicant: Arkema France
    Inventors: Michel Devic, Nicolas Doucet, Laurent Wendlinger, Geraldine Cavallini
  • Publication number: 20120083632
    Abstract: The subject matter of the invention is a process for preparing fluoroolefin compounds. The invention relates more particularly to a process for producing a (hydro)fluoroolefin compound, which comprises (i) bringing at least one compound comprising from three to six carbon atoms, at least two fluorine atoms and at least one hydrogen atom, on the condition that at least one hydrogen atom and one fluorine atom are located on adjacent carbon atoms, into contact with a solid reactant comprising calcium hydroxide.
    Type: Application
    Filed: May 4, 2010
    Publication date: April 5, 2012
    Applicant: Arkema France
    Inventors: Dominique Guillet, Michel Devic
  • Patent number: 8062606
    Abstract: The invention relates to coated reactors resistant to acid corrosion, the production method thereof and the use of same in processes in superacid media. More specifically, the invention relates to a reactor comprising an inner metal wall having a fluoropolymer coating anchored thereto using a perforated sheet positioned between the inner metal wall and the fluoropolymer coating. The surface of the sheet that is in contact with the metal wall of the reactor has a sufficient roughness in order to form a free space (for gases) between same and the metal wall of the reactor. In addition, the reactor is provided with a device for maintaining the pressure in the free space below that in the reactor.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: November 22, 2011
    Assignee: Arkema France
    Inventor: Michel Devic
  • Patent number: 8058487
    Abstract: The present invention relates to a continuous process for the fluorination of perchloroethylene (PER) in the gas phase in a single stage with hydrofluoric acid (HF) in the presence of a catalyst to give, as major product, pentafluoroethane. The process is characterized in that it is carried out at a temperature of between 280 and 430° C. and with an HF/PER molar ratio of greater than or equal to 20.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: November 15, 2011
    Assignee: Arkema France
    Inventors: Beatrice Boussand, Michel Devic
  • Publication number: 20110201852
    Abstract: A subject-matter of the invention is a process for the preparation of fluoroolefin compounds. It relates more particularly to a process for the manufacture of a compound of formula (I) CF3—CF=CHX in which X represents a hydrogen or fluorine atom, comprising at least one stage of dehydrofluorination of a compound of formula (II) CF3—CHF—CHFX during which the compound of formula (II) is brought into contact with a mixture composed of water and of potassium hydroxide in which the potassium hydroxide is present in an amount of between 58 and 86% by weight.
    Type: Application
    Filed: August 18, 2009
    Publication date: August 18, 2011
    Applicant: ARKEMA FRANCE
    Inventors: Anne Pigamo, Michel Devic, Laurent Wendlinger
  • Publication number: 20110190554
    Abstract: A subject-matter of the invention is a process for the preparation of 2,3,3,3-tetrafluoro-1-propene which comprises the following stages: (i) hydrogenation of hexafluoropropylene to give 1,1,1,2,3,3-hexafluoropropane; (ii) dehydrofluorination of the 1,1,1,2,3,3-hexafluoropropane obtained in the preceding stage to give 1,2,3,3,3-pentafluoro-1-propene; (iii) hydrogenation of the 1,2,3,3,3-pentafluoro-1-propene obtained in the preceding stage to give 1,1,1,2,3-pentafluoropropane; and (iv) dehydrofluorination of the 1,1,1,2,3-pentafluoropropane obtained in the preceding stage to give 2,3,3,3-tetrafluoro-1-propene. Stages (ii) and (iv) are carried out using a water and potassium hydroxide mixture with the potassium hydroxide representing between 58 and 86% by weight of the mixture and at a temperature of between 110 and 180° C.
    Type: Application
    Filed: August 19, 2009
    Publication date: August 4, 2011
    Applicant: Arkema France
    Inventors: Anne Pigamo, Michel Devic, Laurent Wendlinger
  • Publication number: 20110160498
    Abstract: The subject of the invention is a process for the preparation of 2,3-dichloro-1,1,1-trifluoropropane by chlorination of 3,3,3-trifluoropropene at a pressure greater than 2 bar. Application in the synthesis of 1234yf.
    Type: Application
    Filed: September 11, 2009
    Publication date: June 30, 2011
    Inventors: Anne Pigamo, Michel Devic, Laurent Wendlinger