Patents by Inventor Georges Fremy

Georges Fremy 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: 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
  • Patent number: 10563236
    Abstract: Provided is an enzymatic process for preparing L-methionine from diethyl disulfide.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: February 18, 2020
    Assignee: Akema France
    Inventors: Georges Fremy, Arnaud Masselin, Hugo Brasselet
  • Patent number: 10550077
    Abstract: The present invention relates to a method for preparing dimethyl disulphide, 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 optionally hydrogen (H2); c) optionally, but preferably, recirculating said hydrogen sulphide (H2S) formed in step b) to step a); d) reacting the methyl mercaptan formed in step b) with sulphur such as to form dimethyl disulphide and hydrogen sulphide; e) optionally recirculating the hydrogen sulphide formed during step d) to step a); and f) recovering the dimethyl disulphide.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: February 4, 2020
    Assignee: Arkema France
    Inventors: Georges Fremy, Patrice Barre, Jean-Michel Raymond
  • Publication number: 20200010412
    Abstract: Provided is a process for preparing polythiols by preparing a sulfhydration reaction medium, simultaneously carrying out radical sulfhydration reaction of at least one polyene and acid-catalyzed sulfhydration reaction of the polyene and recovering a mixture including at least two polythiols. Also provided is a mixture of polythiols obtained from the process described herein.
    Type: Application
    Filed: February 6, 2018
    Publication date: January 9, 2020
    Applicant: Arkema France
    Inventors: Pascal Saint-Louis-Augustin, Georges Fremy, Bernard Monguillon, Louis Corbel
  • Publication number: 20190338325
    Abstract: Provided is process for the synthesis of at least one functionalized organic polysulfide.
    Type: Application
    Filed: December 21, 2017
    Publication date: November 7, 2019
    Applicant: Arkema France
    Inventors: Georges Fremy, Arnaud Masselin
  • Patent number: 10377704
    Abstract: The invention relates to a catalyst comprising an active component based on molybdenum and on potassium and a support based on hydroxyapatite, and also to a process for preparing said catalyst and a process for producing methyl mercaptan in a catalytic process by reaction of carbon monoxide, sulphur and/or hydrogen sulphide and hydrogen, comprising the use of said catalyst.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: August 13, 2019
    Assignee: Arkema France
    Inventors: Georges Fremy, Patrice Barre, Karine Sanchou, Alexia Cordova, Carole Lamonier, Pascal Blanchard
  • Publication number: 20190055586
    Abstract: Provided is an enzymatic process for preparing mercaptans from disulfides.
    Type: Application
    Filed: September 29, 2016
    Publication date: February 21, 2019
    Applicant: ARKEMA FRANCE
    Inventors: Georges FREMY, Arnaud MASSELIN
  • Publication number: 20180291408
    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: Application
    Filed: September 29, 2016
    Publication date: October 11, 2018
    Applicant: Arkema France
    Inventors: Georges FREMY, Arnaud MASSELIN
  • Publication number: 20180282772
    Abstract: Provided is an enzymatic process for preparing L-methionine from diethyl disulfide.
    Type: Application
    Filed: September 29, 2016
    Publication date: October 4, 2018
    Applicant: Arkema France
    Inventors: Georges FREMY, Arnaud MASSELIN, Hugo BRASSELET
  • Publication number: 20180273991
    Abstract: Provided is an enzymatic process for the preparation of a mercaptan of formula R—SH from disulfides utilizing hydrogen.
    Type: Application
    Filed: September 29, 2016
    Publication date: September 27, 2018
    Applicant: Arkema France
    Inventors: Georges FREMY, Arnaud MASSELIN, Hugo BRASSELET
  • Publication number: 20180230093
    Abstract: The invention relates to a catalyst comprising an active component based on molybdenum and on potassium and a support based on hydroxyapatite, and also to a process for preparing said catalyst and a process for producing methyl mercaptan in a catalytic process by reaction of carbon monoxide, sulphur and/or hydrogen sulphide and hydrogen, comprising the use of said catalyst.
    Type: Application
    Filed: March 2, 2018
    Publication date: August 16, 2018
    Applicant: Arkema France
    Inventors: Georges FREMY, Patrice BARRE, Karine SANCHOU, Alexia CORDOVA, Carole LAMONIER, Pascal BLANCHARD
  • Patent number: 9944594
    Abstract: The invention relates to a catalyst comprising an active component based on molybdenum and on potassium and a support based on hydroxyapatite, and also to a process for preparing said catalyst and a process for producing methyl mercaptan in a catalytic process by reaction of carbon monoxide, sulphur and/or hydrogen sulphide and hydrogen, comprising the use of said catalyst.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: April 17, 2018
    Assignee: ARKEMA FRANCE
    Inventors: Georges Fremy, Patrice Barre, Karine Sanchou, Alexia Cordova, Carole Lamonier, Pascal Blanchard
  • Patent number: 9821302
    Abstract: The invention relates to a hydrocarbon hydroprocessing catalyst comprising a support based on at least one refractory oxide, at least one metal from group VIII and at least one metal from group VIB. The inventive catalyst is characterized in that it also comprises at least one organic compound having formula (I) or (II): in which each R1 represents independently an alkyl group at C1-18, an alkenyl group at C2-18, an aryl group at C6-18, a cycloalkyl group at C3-8, an alkylaryl or arylalkyl group at C7-20, or the two R1 groups together form a divalent group at C2-18, and R2 represents an alkylene group at C1-18, an arylene group at C6-18, a cycloalkylene group at C3-7, or a combination of same. The invention also relates to a method of preparing one such catalyst and to the use thereof for hydroprocessing or hydrocracking.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: November 21, 2017
    Assignee: TOTAL RAFFINAGE FRANCE
    Inventors: Thierry Cholley, Jean-Pierre Dath, Claude Brun, Georges Fremy, Francis Humblot
  • Publication number: 20170158631
    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: June 29, 2015
    Publication date: June 8, 2017
    Applicant: Arkema France
    Inventors: Georges FREMY, Patrice BARRE, Jean-Michel RAYMOND
  • Publication number: 20170144966
    Abstract: The present invention relates to a method for preparing dimethyl disulphide, 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 optionally hydrogen (H2); c) optionally, but preferably, recirculating said hydrogen sulphide (H2S) formed in step b) to step a); d) reacting the methyl mercaptan formed in step b) with sulphur such as to form dimethyl disulphide and hydrogen sulphide; e) optionally recirculating the hydrogen sulphide formed during step d) to step a); and f) recovering the dimethyl disulphide.
    Type: Application
    Filed: June 29, 2015
    Publication date: May 25, 2017
    Applicant: Arkema France
    Inventors: Georges FREMY, Patrice BARRE, Jean-Michel RAYMOND
  • Patent number: 9562006
    Abstract: The invention relates to a process for the preparation of symmetrical or asymmetrical dialkyl disulphides by involving at least one mixture of symmetrical and/or asymmetrical dialkyl disulphides in a basic and/or photochemical catalytic reaction, with joint extraction, preferably continuously, of the symmetrical and/or asymmetrical disulphide(s) which it is desired to obtain. The process of the invention is particularly suited to the preparation of dimethyl disulphide or diethyl disulphide from a mixture of symmetrical and/or asymmetrical dialkyl disulphides.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: February 7, 2017
    Assignee: Arkema France
    Inventor: Georges Fremy
  • Publication number: 20160326105
    Abstract: The invention relates to a catalyst comprising an active component based on molybdenum and on potassium and a support based on hydroxyapatite, and also to a process for preparing said catalyst and a process for producing methyl mercaptan in a catalytic process by reaction of carbon monoxide, sulphur and/or hydrogen sulphide and hydrogen, comprising the use of said catalyst.
    Type: Application
    Filed: March 28, 2014
    Publication date: November 10, 2016
    Applicant: Arkema France
    Inventors: Georges FREMY, Patrice BARRE, Karine SANCHOU, Alexia CORDOVA, Carole LAMONIER, Pascal BLANCHARD