Patents by Inventor Eric Lamant

Eric Lamant 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: 20240270686
    Abstract: The present invention relates to a process for preparing at least one mercaptan, comprising the following steps: A) H2S and at least one alcohol are introduced into a first reactor; B) the H2S and said at least one alcohol are reacted to obtain an outlet stream comprising at least one mercaptan, at least one dialkyl sulfide and at least one dialkyl disulfide (DADS) and possibly unreacted H2S; C) said outlet stream obtained from step B) is separated into: a stream F1 comprising the mercaptan(s), a stream F2 comprising the dialkyl sulfide(s) and the DADS(s), and optionally a stream F3 comprising H2S; D) a purification step is performed on stream F2 in order to separate: a stream F2? comprising the dialkyl sulfide(s); and the DADS(s); E) stream F2? is introduced with H2S into a second reactor; F) a sulfhydrolysis reaction of the dialkyl sulfide(s) with H2S is performed to obtain an outlet stream F4 comprising said mercaptan(s), and possibly unreacted H2S; G) optionally, stream F4 obtained from step F) i
    Type: Application
    Filed: June 20, 2022
    Publication date: August 15, 2024
    Applicant: ARKEMA FRANCE
    Inventors: Georges FREMY, Hélori SALEMBIER, Guillaume LAUDUMIEY, Joaquin LACAMBRA, Eric LAMANT
  • Patent number: 11897837
    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: Grant
    Filed: May 10, 2022
    Date of Patent: February 13, 2024
    Assignee: Arkema France
    Inventors: Georges Fremy, Jean-Michel Raymond, Eric Lamant
  • Publication number: 20240018100
    Abstract: The present invention relates to a process for producing methyl mercaptan, comprising the following steps: A) methanol is reacted with hydrogen sulfide to form a stream (M), preferably in gaseous form, comprising methyl mercaptan, unreacted H2S and possibly sulfur byproducts; B) optionally, said stream (M) is condensed; C) at least one step of purification of said stream (M) is performed to obtain a stream enriched in methyl mercaptan; D) the gaseous vents resulting from said at least one purification step are recovered, said gaseous vents comprising at least one sulfur compound, preferably H2S; E) a gas-liquid extraction of said at least one sulfur compound, preferably H2S, is performed with liquid methanol so as to obtain a liquid methanol enriched in sulfur compound(s), preferably in H2S; and F) optionally, said enriched methanol is used as reagent for the reaction of step A).
    Type: Application
    Filed: December 16, 2021
    Publication date: January 18, 2024
    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
  • 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