Patents by Inventor Georges FRÉMY

Georges FRÉMY 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).

  • Method for sulphurizing hydrotreating catalysts
    Publication number: 20040112795
    Abstract: The invention concerns a method for sulphurizing catalysts for hydrotreating of hydrocarbon feedstocks. The invention is characterised in that it consists in sulphurizing the catalyst in two steps: the first step consisting in sulphurization with tertiary mercaptan in the absence of hydrogen, and the second step, carried out consecutively in the same reactor, consisting of sulphurization with another sulphurizing agent in the presence of hydrogen. The catalysts thus sulphurized prove to be more active than those sulphurized by only the second step.
    Type: Application
    Filed: January 13, 2004
    Publication date: June 17, 2004
    Inventors: Claude Brun, Georges Fremy
  • Compositions based on dimethyl disulphide with a masked smell
    Patent number: 6743951
    Abstract: A composition based on dimethyl disulphide (DMDS) with a masked smell according to the invention comprises, by weight, at least 95% of DMDS, less than 500 ppm of methyl mercaptan, less than 100 ppm of dimethyl sulphide and up to 1% of at least one odor-masking agent.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: June 1, 2004
    Assignee: Elf Atochem S.A.
    Inventor: Georges Fremy
  • Method for making dimethyl disulphide compositions having a masked smell
    Patent number: 6639110
    Abstract: A composition based on dimethyl disulphide (DMDS) with a masked smell according to the invention comprises, by weight, at least 95% of DMDS, less than 500 ppm of methyl mercaptan, less than 100 ppm of dimethyl sulphide and up to 1% of at least one odor-masking agent.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: October 28, 2003
    Assignee: Elf Atochem, S.A.
    Inventor: Georges Fremy
  • Compositions based on dimethyl disulphide with a masked smell
    Publication number: 20020156326
    Abstract: A composition based on dimethyl disulphide (DMDS) with a masked smell according to the invention comprises, by weight, at least 95% of DMDS, less than 500 ppm of methyl mercaptan, less than 100 ppm of dimethyl sulphide and up to 1% of at least one odor-masking agent.
    Type: Application
    Filed: January 14, 2002
    Publication date: October 24, 2002
    Inventor: Georges Fremy
  • METHOD FOR MAKING DIMETHYL DISULPHIDE COMPOSITIONS HAVING A MASKED SMELL
    Publication number: 20020151753
    Abstract: A composition based on dimethyl disulphide (DMDS) with a masked smell according to the invention comprises, by weight, at least 95% of DMDS, less than 500 ppm of methyl mercaptan, less than 100 ppm of dimethyl sulphide and up to 1% of at least one odour-masking agent.
    Type: Application
    Filed: January 14, 2002
    Publication date: October 17, 2002
    Inventor: Georges Fremy
  • COMPOSITIONS BASED ON DIMETHYL DISULPHIDE WITH A MASKED SMELL
    Publication number: 20010005766
    Abstract: A composition based on dimethyl disulphide (DMDS) with a masked smell according to the invention comprises, by weight, at least 95% of DMDS, less than 500 ppm of methyl mercaptan, less than 100 ppm of dimethylsulphide and up to 1% of at least one odor-masking agent.
    Type: Application
    Filed: July 12, 1999
    Publication date: June 28, 2001
    Inventor: GEORGES FREMY
  • Production of stabilized and deodorized organic polysulphides
    Patent number: 6114586
    Abstract: A process for stabilizing and deodorizing a raw organic polysulfide by treating it with an alkylene carbonate in the presence of a basic catalyst and, optionally, a sulfur donor.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: September 5, 2000
    Assignee: Elf Atochem S.A.
    Inventors: Jean-Fran.cedilla.ois Devaux, Georges Fremy, Yves Labat
  • Synthesis of organic disulphides and polysulphides
    Patent number: 6020529
    Abstract: A process for the manufacture of organic disulphides and polysulphides using a basic resin catalyst wherein the catalyst is a polystyrene-divinylbenzene resin functionalized with ethylenediamine or a polyethylenepolyamine groups.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: February 1, 2000
    Assignee: Elf Atochem S.A.
    Inventor: Georges Fremy