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).

  • Publication number: 20230295080
    Abstract: The present invention relates to a process for synthesizing functionalized mercaptans essentially in the absence of oxygen, and also to a composition making it possible in particular to implement this process.
    Type: Application
    Filed: July 13, 2021
    Publication date: September 21, 2023
    Applicant: ARKEMA FRANCE
    Inventors: Georges FREMY, Jean-Christophe LEC
  • Publication number: 20230167052
    Abstract: A process for preparing an S,S?-dialkyldithiocarbonate from a dialkyl disulfide and from a particular metal catalyst, in the presence of carbon monoxide is described in addition to the use of S,S?-dialkyldithiocarbonates as reagents for the preparation of polycarbonates, compounds containing at least one urea and/or isocyanate function and compounds containing at least one thioalkyl function.
    Type: Application
    Filed: March 13, 2019
    Publication date: June 1, 2023
    Applicant: Arkema France
    Inventors: Paul-Guillaume Schmitt, Georges Frémy, Gilles-Olivier Gratien
  • Publication number: 20230159967
    Abstract: Provided is process for the synthesis of at least one functionalized organic polysulfide.
    Type: Application
    Filed: January 24, 2023
    Publication date: May 25, 2023
    Applicant: Arkema France
    Inventors: Georges Frémy, Arnaud Masselin
  • Publication number: 20230159447
    Abstract: Chemoenzymatic process for coproducing a disulfide and a sulfoxide or a sulfone The present invention relates to a chemoenzymatic process for coproducing disulfide and sulfoxide or sulfone from a composition M comprising: 1) a sulfide, 2) optionally an oxidizing agent, 3) an organic compound bearing at least one thiol group, 4) an enzyme E catalyzing the oxidation of said sulfide to sulfoxide or to sulfone, 5) an enzyme D catalyzing the formation of a disulfide bridge between two equivalents of said organic compound bearing at least one thiol group to form a dimer, and 6) a cofactor common to the two enzymes E and D; and also to a composition enabling especially the implementation of this process. The present invention also relates to the use of a mercaptan for reducing a disulfide bridge formed between two equivalents of an organic compound bearing at least one thiol group, and more particularly to the use thereof as regeneration substrate of the process described above.
    Type: Application
    Filed: March 3, 2021
    Publication date: May 25, 2023
    Applicants: Arkema France, Centre National De La Recherche Scientifique - CNRS, Universite d'AIX-Marseille
    Inventors: Georges Fremy, Hugo Brasselet, Jean-Christophe Lec, Véronique Alphand, Katia Duquesne
  • Patent number: 11643673
    Abstract: Provided is a process for synthesizing a functionalized cyclic dithiocarbamate.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: May 9, 2023
    Assignee: Arkema France
    Inventors: Georges Fremy, Arnaud Masselin
  • Patent number: 11608315
    Abstract: The invention relates to a process for preparing methyl mercaptan from a mixture of carbon oxide, hydrogen sulfide and hydrogen, in the presence of a catalyst based on molybdenum and potassium supported on zirconia, said catalyst not comprising any promoter.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: March 21, 2023
    Assignees: Arkema France, Universite Lille 1-Sciences et Technologies, Centre National de la Recherche Scientifique (CNRS)
    Inventors: Georges Frémy, Hélori Salembier, Carole Lamonier, Pascal Blanchard
  • Patent number: 11578345
    Abstract: Provided is process for the synthesis of at least one functionalized organic polysulfide.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: February 14, 2023
    Assignee: Arkema France
    Inventors: Georges Fremy, Arnaud Masselin
  • Publication number: 20230016226
    Abstract: The present invention relates to a selective process for preparing sulfones from sulfides by enzymatic catalysis, and to a composition comprising a symmetrical sulfide, an oxidoreductase enzyme catalyzing the oxidation of said symmetrical sulfide to symmetrical sulfone; optionally at least one cofactor C of said enzyme E; and an oxidant, which allows in particular the implementation of said process.
    Type: Application
    Filed: June 12, 2020
    Publication date: January 19, 2023
    Applicants: Arkema France, Centre National de la Recherche Scientifique (CNRS), Universite d'Aix-Marseille
    Inventors: Georges Fremy, Hugo Brasselet, Véronique Alphand, Katia Duquesne
  • Publication number: 20220372530
    Abstract: Provided is an enzymatic process for preparing mercaptans from disulfides.
    Type: Application
    Filed: July 22, 2022
    Publication date: November 24, 2022
    Applicant: Arkema France
    Inventors: Georges Fremy, Arnaud Masselin
  • Publication number: 20220363631
    Abstract: The invention relates to a process for the co-production of alkyl mercaptan and of dialkyl disulfide, comprising the following successive steps: a) reaction of a C1-C4 alcohol in the presence of hydrogen sulfide (H2S) to form a stream (M) comprising an alkyl mercaptan, water, and possibly unreacted hydrogen sulfide, b) purification of the stream (M) to obtain a stream (N) enriched in alkyl mercaptan, c) recovery of a first portion of the stream (N) including the alkyl mercaptan purified in step b), d) oxidation with sulfur of the second portion of the stream (N) of alkyl mercaptan, to form a stream (O) comprising a dialkyl disulfide, hydrogen sulfide, and possibly unreacted alkyl mercaptan, e) purification of the stream (O) to separate, on the one hand, the enriched dialkyl disulfide and, on the other hand, the hydrogen sulfide and possibly the alkyl mercaptan that has not reacted in step d), f) recycling of the hydrogen sulfide and possibly of the alkyl mercaptan isolated in step e) into the stream (M) ob
    Type: Application
    Filed: May 10, 2022
    Publication date: November 17, 2022
    Applicant: Arkema France
    Inventors: Georges Fremy, Jean-Michel Raymond, Eric Lamant
  • Publication number: 20220363630
    Abstract: The invention relates to a process for the co-production of methyl mercaptan and of dimethyl disulfide, comprising the following successive steps: a) reaction of at least one carbon oxide in the presence of hydrogen sulfide (H2S) and hydrogen to form a stream (M) comprising methyl mercaptan, water, and possibly unreacted hydrogen sulfide, b) purification of the stream (M) to obtain a stream (N) enriched in methyl mercaptan and a stream containing the uncondensable compounds (Muncond), c) optional recycling of the stream of uncondensable compounds (Muncond) obtained from step b) into step a), d) recovery of a first portion of the stream (N) including methyl mercaptan purified in step b), e) oxidation with sulfur of the second portion of the stream (N) of methyl mercaptan, to form a stream (O) comprising dimethyl disulfide, hydrogen sulfide, and possibly unreacted methyl mercaptan, f) purification of the stream (O) to separate, on the one hand, the enriched dimethyl disulfide and, on the other hand, the hydr
    Type: Application
    Filed: May 10, 2022
    Publication date: November 17, 2022
    Applicant: Arkema France
    Inventors: Georges Fremy, Jean-Michel Raymond, Eric Lamant, Helori Salembier
  • Patent number: 11434513
    Abstract: Provided is an enzymatic process for preparing mercaptans from disulfides.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: September 6, 2022
    Assignee: ARKEMA FRANCE
    Inventors: Georges Fremy, Arnaud Masselin
  • Publication number: 20220259624
    Abstract: The present invention relates to a selective process for preparing sulfoxides from sulfides by enzymatic catalysis, and to a composition comprising a symmetrical sulfide, an oxidoreductase enzyme catalyzing the oxidation of said symmetrical sulfide to symmetrical sulfoxide; optionally at least one cofactor C of said enzyme E; and an oxidant, which allows in particular the implementation of said process.
    Type: Application
    Filed: June 12, 2020
    Publication date: August 18, 2022
    Applicants: Arkema France, Centre National de la Recherche Scientifique (CNRS), Universite d'Aix-Marseille
    Inventors: Georges Fremy, Hugo Brasselet, Véronique Alphand, Katia Duquesne
  • Patent number: 11104642
    Abstract: The present invention relates to a method for preparing methyl mercaptan, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (H2S) and optionally sulphur (S) such as to form carbon disulphide (CS2) and hydrogen (H2); b) reacting said carbon disulphide (CS2) by hydrogenation in the presence of said hydrogen (H2) obtained in step a) such as to form methyl mercaptan (CH3SH), hydrogen sulphide (H2S) and possibly hydrogen (H2); c) optionally recirculating said hydrogen sulphide (H2S) formed during step b) to step a); and d) recovering the methyl mercaptan.
    Type: Grant
    Filed: May 8, 2020
    Date of Patent: August 31, 2021
    Assignee: Arkema France
    Inventors: Georges Fremy, Patrice Barre, Jean-Michel Raymond
  • Publication number: 20200331851
    Abstract: The present invention relates to a method for preparing methyl mercaptan, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (H2S) and optionally sulphur (S) such as to form carbon disulphide (CS2) and hydrogen (H2); b) reacting said carbon disulphide (CS2) by hydrogenation in the presence of said hydrogen (H2) obtained in step a) such as to form methyl mercaptan (CH3SH), hydrogen sulphide (H2S) and possibly hydrogen (H2); c) optionally recirculating said hydrogen sulphide (H2S) formed during step b) to step a); and d) recovering the methyl mercaptan.
    Type: Application
    Filed: May 8, 2020
    Publication date: October 22, 2020
    Applicant: Arkema France
    Inventors: Georges Fremy, Patrice Barre, Jean-Michel Raymond
  • Publication number: 20200331852
    Abstract: The invention relates to a process for preparing methyl mercaptan from a mixture of carbon oxide, hydrogen sulfide and hydrogen, in the presence of a catalyst based on molybdenum and potassium supported on zirconia, said catalyst not comprising any promoter.
    Type: Application
    Filed: December 20, 2018
    Publication date: October 22, 2020
    Applicants: Arkema France, Université Lille 1 - Sciences et Technologies, Centre National De La Recherche Scientifique-CNRS
    Inventors: Georges FRÉMY, Hélori SALEMBIER, Carole LAMONIER, Pascal BLANCHARD
  • Patent number: 10689334
    Abstract: The present invention relates to a method for preparing methyl mercaptan, in batches or continuously, preferably continuously, said method including at least the following steps: a) reacting at least one hydrocarbon feedstock in the presence of hydrogen sulphide (H2S) and optionally sulphur (S) such as to form carbon disulphide (CS2) and hydrogen (H2); b) reacting said carbon disulphide (CS2) by hydrogenation in the presence of said hydrogen (H2) obtained in step a) such as to form methyl mercaptan (CH3SH), hydrogen sulphide (H2S) and possibly hydrogen (H2); c) optionally recirculating said hydrogen sulphide (H2S) formed during step b) to step a); and d) recovering the methyl mercaptan.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: June 23, 2020
    Assignee: Arkema France
    Inventors: Georges Fremy, Patrice Barre, Jean-Michel Raymond
  • Publication number: 20200149080
    Abstract: Provided is a process for synthesizing a functionalized cyclic dithiocarbamate.
    Type: Application
    Filed: December 21, 2017
    Publication date: May 14, 2020
    Applicant: Arkema France
    Inventors: Georges Fremy, Arnaud Masselin
  • Patent number: 10648007
    Abstract: Provided is an enzymatic process for the preparation of a mercaptan of formula R—SH from disulfides utilizing hydrogen.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: May 12, 2020
    Assignee: ARKEMA FRANCE
    Inventors: Georges Fremy, Arnaud Masselin, Hugo Brasselet
  • Patent number: 10563235
    Abstract: Provided is a process for the preparation of L-methionine in an enzymatic reaction utilizing dimethyl disulfide (DMDS) a precursor of L-methionine, and an organic reducing compound. In the process, methyl mercaptan can be formed by the enzymatic hydrogenolysis of the DMDS.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: February 18, 2020
    Assignee: Arkema France
    Inventors: Georges Fremy, Arnaud Masselin