Patents by Inventor Eric Lacroix

Eric Lacroix 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).

  • Bulk catalysts based on chromium and on nickel for the gas-phase fluorination of halogenated hydrocarbons
    Patent number: 6649560
    Abstract: Catalysts which are useful in the fluorination of halogenated hydrocarbons by HF in the gas phase are obtained by simple impregnation of a bulk chromium oxide with a solution of a nickel derivative, the chromium oxide used exhibiting a BET specific surface of greater than 150 m2/g and a pore volume of greater than 0.15 ml/g.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: November 18, 2003
    Assignee: Elf Atochem
    Inventors: Eric Lacroix, Jean-Pierre Schirmann
  • Process for the manufacture of difluoromethane
    Patent number: 6639115
    Abstract: The invention relates to the synthesis of difluoromethane by gas-phase catalytic fluorination of methylene chloride. To lengthen the lifetime of the catalyst the operation is carried out in the presence of chlorine.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: October 28, 2003
    Assignee: Atofina
    Inventors: Benoit Requieme, Sylvain Perdrieux, Bernard Cheminal, Eric Lacroix, Andre Lantz
  • Process for the preparation of 1,1,1-trifluoro-2,2-dichloroethane
    Patent number: 6590130
    Abstract: The invention relates to a process for the preparation of 1,1,1-trifluoro-2,2-dichloroethane (F123). This process consists in bringing 1,1,1-trifluoro-2-chloroethane (F133a) into contact with chlorine in the presence of hydrogen fluoride and of a fluorination catalyst. The F133a can be obtained by chlorination of trichloroethylene and the F123 can subsequently be fluorinated to F125.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: July 8, 2003
    Assignee: Atofina
    Inventors: Eric Jorda, Eric Lacroix, Sylvain Perdrieux
  • Fluorinated diol and method for the production thereof
    Patent number: 6506947
    Abstract: The subject-matter of the invention is a fluorinated diol and its process of preparation. The fluorinated diol corresponds to the formula (I): CnF2n+1—A—CH2OCH2—C(CH2OH)2—R in which n has a value from 2 to 20 and A means —CH═CH— or —CH2CH2— and R is an alkyl group comprising 1 to 4 carbon atoms.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: January 14, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Marie-Jose Lina, Eric Lacroix, Sophie Vanpoulle, Gerard Orcel, Robert Overton
  • Process for the preparation of 1,1,1-trifluoro-2,2-dichloroethane
    Publication number: 20020198418
    Abstract: The invention relates to a process for the preparation of 1,1,1-trifluoro-2,2-dichloroethane (F123).
    Type: Application
    Filed: February 28, 2001
    Publication date: December 26, 2002
    Inventors: Eric Jorda, Eric Lacroix, Sylvain Perdrieux
  • Bulk catalysts based on chromium and on nickel for the gas-phase fluorination of halogenated hydrocarbons
    Publication number: 20020155947
    Abstract: Catalysts which are useful in the fluorination of halogenated hydrocarbons by HF in the gas phase are obtained by simple impregnation of a bulk chromium oxide with a solution of a nickel derivative, the chromium oxide used exhibiting a BET specific surface of greater than 150 m2/g and a pore volume of greater than 0.15 ml/g.
    Type: Application
    Filed: March 28, 2002
    Publication date: October 24, 2002
    Inventors: Eric Lacroix, Jean-Pierre Schirmann
  • Polyurethane acrylate or vinyl type polymeric material for coating optical fibers based on a fluorinated diol
    Patent number: 6423809
    Abstract: The invention provides a polyurethane type polymeric material for coating optical fibers, based on a fluorinated diol with formula I: CnF2n+1—A—CH2OCH2—C (CH2OH)2—R where n is 2 to 20, and A signifies —CH═CH or —CH2CH2—, and R is an alkyl group containing 1 to 4 carbon atoms. The invention also provides a fiber coated with this polymer which has been light-cured, and a fiber drawing method comprising a step of coating the fiber with a material of the invention.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: July 23, 2002
    Assignee: Alcatel
    Inventors: Sophie Vanpoulle, Gérard Orcel, Bob J. Overton, Marie-José Lina, Eric Lacroix
  • Mixed fluorination catalyst
    Patent number: 6297411
    Abstract: Mixed fluorination catalyst comprising one or more nickel and chromium oxides, halides and/or oxyhalides deposited on a support composed of aluminium fluoride or of a mixture of aluminium fluoride and alumina, characterized in that the weight of nickel/weight of chromium ratio is between 0.08 and 0.25, preferably between 0.1 and 0.2.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: October 2, 2001
    Assignee: Elf Atochem S.A.
    Inventors: Philippe Bonnet, Eric Jorda, Eric Lacroix
  • Process for the manufacture of difluoromethane
    Publication number: 20010003786
    Abstract: The invention relates to the synthesis of difluoromethane by gas-phase catalytic fluorination of methylene chloride.
    Type: Application
    Filed: January 18, 2001
    Publication date: June 14, 2001
    Applicant: ELF ATOCHEM S.A.
    Inventors: Benoit Requieme, Sylvain Perdrieux, Bernard Cheminal, Eric Lacroix, Andre Lantz
  • Process for the manufacture of difluoromethane
    Patent number: 6242659
    Abstract: The invention relates to the synthesis of difluoromethane by gas-phase catalytic fluorination of methylene chloride. To lengthen the lifetime of the catalyst the operation is carried out in the presence of chlorine.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: June 5, 2001
    Assignee: Elf Atochem, S.A.
    Inventors: Benoit Requieme, Sylvain Perdrieux, Bernard Cheminal, Eric Lacroix, Andre Lantz
  • Mixed fluorination catalyst
    Patent number: 6184172
    Abstract: Mixed fluorination catalyst comprising one or more nickel and chromium oxides, halides and/or oxyhalides deposited on a support composed of aluminium fluoride or of a mixture of aluminium fluoride and alumina, characterized in that the weight of nickel/weight of chromium ratio is between 0.08 and 0.25, preferably between 0.1 and 0.2.
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: February 6, 2001
    Assignee: Elf Atochem S.A.
    Inventors: Philippe Bonnet, Eric Jorda, Eric Lacroix
  • Process for the purification of pentafluoroethane by extractive distillation
    Patent number: 6039845
    Abstract: A process for the purification of pentafluoroethane (F125) containing chloropentafluoroethane (F115). The F125-F115 mixture to be purified is subjected to an extractive distillation, the extractant being a C.sub.5 -C.sub.8 perfluoroalkyl halide.
    Type: Grant
    Filed: January 2, 1998
    Date of Patent: March 21, 2000
    Assignee: Elf Atochem S.A.
    Inventors: Rene Bertocchio, Eric Lacroix, Sylvain Perdrieux
  • Process for the manufacture of hydrofluoroalkanes
    Patent number: 6025532
    Abstract: In order to manufacture pentafluoroethane (F125) and/or 1,1,1,2,3,3,3-haptafluoropropane (F227ea), a trifluoromethane gas stream is subjected to pyrolysis and then the mixture of gases which result from this pyrolysis is brought into contact with a fluorination catalyst.
    Type: Grant
    Filed: June 17, 1998
    Date of Patent: February 15, 2000
    Assignee: Elf Atochem S.A.
    Inventors: Jean-Marc Sage, Eric Lacroix, Philippe Bonnet, Eric Jorda
  • Purification of pentafluoroethane
    Patent number: 5990364
    Abstract: In order to purify a crude pentafluoroethane (F125) containing chloropentafluoroethane (F115), it is subjected to a heat treatment in the presence of hydrogen, the treatment being carried out at a temperature at least equal to 550.degree. C. and with an H.sub.2 /F115 molar ratio of at least 10.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: November 23, 1999
    Inventors: Jean-Pierre Schirmann, Serge Hub, Eric Lacroix, Andre Lantz
  • Process for fluorination of perchloroethylene or of pentachloroethane
    Patent number: 5932776
    Abstract: The invention relates to catalytic fluorination of perchloroethylene or of pentachloroethane in the gas phase by means of hydrofluoric acid.A mixed catalyst is employed, made up of nickel and chromium oxides, halides and/or oxyhalides deposited on a support consisting of aluminium fluoride or of a mixture of aluminium fluoride and alumina.
    Type: Grant
    Filed: November 6, 1996
    Date of Patent: August 3, 1999
    Inventors: Bernard Cheminal, Eric Lacroix, Andre Lantz
  • Process for stabilization of pentafluoroethane
    Patent number: 5932775
    Abstract: To avoid the formation of acidity in an F125 containing olefins, a radical scavenger and/or an acidity scavenger is added to it.
    Type: Grant
    Filed: November 4, 1997
    Date of Patent: August 3, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Eric Lacroix, Jean-Marc Sage
  • Purification of chlorotetraflouroethane by extractive distillation
    Patent number: 5922175
    Abstract: A process for the purification of 1-chloro-1,2,2,2-tetrafluoroethane (F124) containing 1,2-dichlorotetrafluoroethane (F114) and/or 1,1-dichlorotetrafluoroethane (F114a). The F124 to be purified is subjected to extractive distillation, the extractant being chosen from C.sub.5 -C.sub.8 aliphatic or cycloaliphatic hydrocarbons and C.sub.4 -C.sub.8 perfluoroalkyl halides.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: July 13, 1999
    Assignee: ELF Atochem S.A.
    Inventors: Rene Bertocchio, Eric Deslandes, Eric Lacroix
  • Synthesis of difluoromethane
    Patent number: 5900514
    Abstract: The invention relates to the manufacture of difluoromethane by catalytic gas-phase fluorination of methylene chloride.The operation is carried out in the presence of oxygen at a temperature of between 330 and 450.degree. C. and with a bulk or supported chromium catalyst.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: May 4, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Benoit Requieme, Eric Lacroix, Andre Lantz
  • Regeneration of catalysts for gas phase fluorination
    Patent number: 5880049
    Abstract: In order to regenerate the activity of a catalyst for gas phase fluorination the spent catalyst is treated with chlorine and hydrogen fluoride, at a temperature of between 250.degree. and 450.degree. C.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: March 9, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Eric Lacroix, Bernard Cheminal, Benoit Requieme
  • Process for the purification of saturated hydrofluorocarbons
    Patent number: 5801294
    Abstract: In order to remove olefinic impurities present in a hydrofluorocarbon such as pentafluoroethane (R-125), the impure hydrofluorocarbon is treated with oxygen in the absence of catalyst or of active charcoal.The process is well suited to the purification of fluoroethanes and, more particularly, to that of pentafluoroethane.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: September 1, 1998
    Assignee: Elf Atochem S.A.
    Inventors: Jean-Marc Sage, Eric Lacroix