Patents by Inventor Denis Chretien
Denis Chretien 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).
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Patent number: 11389764Abstract: A method for treating a natural gas containing carbon dioxide using membrane modules which are assigned to a first treatment stage or a second treatment stage and are fluidically connected to a retentate mode or a permeate mode. When evolution in the operating conditions results in one of the processing levels requiring less membrane surface for gas processing and the other processing level requiring more membrane surface for gas processing, then the method allows for reassignment of needed membrane modules assigned from one processing level requiring less membrane surface to another processing level requiring more membrane surface.Type: GrantFiled: January 17, 2018Date of Patent: July 19, 2022Assignee: TOTAL SEInventors: Phuc-Tien Thierry, Denis Chretien, Claire Weiss, Salim Azzi, Aneke Igwume
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Publication number: 20210236986Abstract: A method for treating a natural gas containing carbon dioxide using membrane modules which are assigned to a first treatment stage or a second treatment stage and are fluidically connected to a retentate mode or a permeate mode. When evolution in the operating conditions results in one of the processing levels requiring less membrane surface for gas processing and the other processing level requiring more membrane surface for gas processing, then the method allows for reassignment of needed membrane modules assigned from one processing level requiring less membrane surface to another processing level requiring more membrane surface.Type: ApplicationFiled: January 17, 2018Publication date: August 5, 2021Applicant: T0TAL SAInventors: Phuc-Tien THIERRY, Denis CHRETIEN, Claire WEISS, SALIM AZZI, Aneke IGWUME
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Patent number: 10627159Abstract: The invention relates to a method for the treatment of natural gas containing carbon dioxide, methane and paraffins. The method comprising: a step of extracting the paraffins from the natural gas in a paraffin-removal column, and a step of separating the carbon dioxide and the methane in a distillation column. The operation of the two columns being provided by means of the thermal coupling of said two columns using a thermal coupling heat exchanger.Type: GrantFiled: July 7, 2015Date of Patent: April 21, 2020Assignee: TOTAL SAInventors: Denis Chretien, Salim Azzi, Claire Weiss
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Publication number: 20170211878Abstract: The invention relates to a method for the treatment of natural gas containing carbon dioxide, methane and paraffins. The method comprising: a step of extracting the paraffins from the natural gas in a paraffin-removal column, and a step of separating the carbon dioxide and the methane in a distillation column. The operation of the two columns being provided by means of the thermal coupling of said two columns using a thermal coupling heat exchanger.Type: ApplicationFiled: July 7, 2015Publication date: July 27, 2017Applicant: TOTAL SAInventors: Denis Chretien, Salim Azzi, Claire Weiss
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Patent number: 9168494Abstract: A unit for establishing contact between a liquid and a gas includes: a chamber having a vertical axis; a first series of contact sections disposed along the length of the vertical axis of the chamber; a second series of contact sections disposed along the length of the vertical axis of the chamber, alternated with the contact sections of the first series; and a liquid circulation system designed to circulate a liquid in the contact sections of the first series and in the contact sections of the second series in a separate manner.Type: GrantFiled: October 10, 2011Date of Patent: October 27, 2015Assignee: TOTAL S.A.Inventor: Denis Chretien
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Publication number: 20130204066Abstract: A unit for establishing contact between a liquid and a gas includes: a chamber having a vertical axis; a first series of contact sections disposed along the length of the vertical axis of the chamber; a second series of contact sections disposed along the length of the vertical axis of the chamber, alternated with the contact sections of the first series; and a liquid circulation system designed to circulate a liquid in the contact sections of the first series and in the contact sections of the second series in a separate manner.Type: ApplicationFiled: October 10, 2011Publication date: August 8, 2013Applicant: TOTAL S.A.Inventor: Denis Chretien
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Patent number: 7678951Abstract: The subject of the invention is a method for treating a natural gas containing ethane, comprising the following stages: (a) extraction of at least one part of the ethane from the natural gas; (b) reforming of at least one part of the extracted ethane into a synthesis gas; (c) methanation of the synthesis gas into a methane-rich gas; and (d) mixing of the methane-rich gas with the natural gas. Installation for implementing this method.Type: GrantFiled: November 17, 2006Date of Patent: March 16, 2010Assignee: Total S.A.Inventor: Denis Chretien
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Publication number: 20090005284Abstract: The invention relates to an aqueous base formulation for cleaning rugs, fabrics, carpets, and the like. The formulation is composed of seventy-eight point five percent water, to which is added tetrapotassium pyrophosphate at ten percent of the formulation. A nonionic surfactant, ethoxylated glycery) ricinoleate, is then added at three percent. An isopropyl alcohol is then added at three percent. A fifth product, propylene carbonate, is introduced at five percent. Finally, sodium cumene sulphonate is added at zero point five percent. All these products are inserted with mechanized stirring so as to allow complete homogenization. There are no side effects for the user and the environment.Type: ApplicationFiled: January 16, 2007Publication date: January 1, 2009Inventors: Olivier Denis Chretien, Alain Michel Delaite, Bernard Gilbert Papavoine
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Patent number: 7332145Abstract: Disclosed is a process for the treatment of gas containing mercaptans and acid gases, including the following steps: (1) separating the acid gases from the said gas and obtaining a sweetened gas and the flow of acid gases containing H2S; (2) reacting the H2S thus obtained in step (1) according to the Claus reaction; (3) concentrating the mercaptans in at least one cut of the said sweetened gas; (4) extracting the mercaptans of the said cut; and further comprising: (5) transforming the mercaptans into dialkyl-disulfide (DSO); (6) hydrogenating DSO into H2S; and (7) reacting the H2S thus obtained at step (6) according to the Claus reaction. An installation for carrying out this procedure is also described.Type: GrantFiled: September 9, 2005Date of Patent: February 19, 2008Assignee: Total S.A.Inventor: Denis Chretien
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Publication number: 20070149838Abstract: The subject of the invention is a method for treating a natural gas containing ethane, comprising the following stages: (a) extraction of at least one part of the ethane from the natural gas; (b) reforming of at least one part of the extracted ethane into a synthesis gas; (c) methanation of the synthesis gas into a methane-rich gas; and (d) mixing of the methane-rich gas with the natural gas. Installation for implementing this method.Type: ApplicationFiled: November 17, 2006Publication date: June 28, 2007Applicant: TOTAL S.A.Inventor: Denis Chretien
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Publication number: 20060057056Abstract: The invention relates to a process for the treatment of gas containing mercaptans and acid gases, comprising the following steps: (1) separating the acid gases from the said gas and obtaining a sweetened gas and the flow of acid gases containing H2S; (2) reacting the H2S thus obtained in step (1) according to the Claus reaction; (3) concentrating themercaptans in at least one cut of the said sweetened gas; (4) extracting the mercaptans of the said cut; and further comprising: (5) transforming the mercaptans into dialkyl-disulfide (DSO); (6) hydrogenating DSO into H2S; and (7) reacting the H2S thus obtained at step (6) according to the Claus reaction. The invention also relates to an installation for carrying out this procedure.Type: ApplicationFiled: September 9, 2005Publication date: March 16, 2006Inventor: Denis Chretien
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Patent number: 5471843Abstract: Process and installation for the production of a variable flow rate of at least one principal constituent of air under pressure, of the type in which the constituent is withdrawn in liquid phase from an air distillation apparatus (12), tills liquid is brought to a vaporization pressure, and the liquid is vaporized under this vaporization pressure by heat exchange (in 9; 25) with a calorigenic fluid under pressure. The flow rate of the product constituent is adjusted by modifying the flow rate of the liquid to be vaporized and the vaporization pressure. The vaporization pressure is intermediate the withdrawal pressure and the production pressure, and the gas resulting from the vaporization is compressed to the production pressure (in 20).Type: GrantFiled: September 15, 1994Date of Patent: December 5, 1995Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges ClaudeInventor: Denis Chretien
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Patent number: 5437161Abstract: A process and an installation for the production of a variable flow rate of at least,one principal constituent of air under pressure, wherein a constituent is withdrawn in liquid phase from an air distillation apparatus (12), this liquid is brought to a vaporization pressure, and the liquid is vaporized under this vaporization pressure by heat exchange (in 9) with a calorific fluid under high pressure. The flow rate of the constituent is adjusted by modifying the flow rate of the liquid to be vaporized and the vaporization pressure. The vaporization pressure is intermediate the withdrawal pressure and the production pressure. The gas resulting from the vaporization is compressed in a compressor (20) to the production pressure.Type: GrantFiled: June 6, 1994Date of Patent: August 1, 1995Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges ClaudeInventor: Denis Chretien
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Patent number: 5386686Abstract: Process for the operation of a gas turbine group (1) producing energy by combustion of a gaseous fuel (24) with a mixture of air gas. There is interconnected with the group (1) an air gas separation unit (7) producing at least two air gases (9; 10-13). The operating conditions of the turbine (3) of the group are maintained similar to those of maximum power production by selecting, with the aid of the separation unit (7), the parameters of the mixture of air gas.Type: GrantFiled: June 15, 1994Date of Patent: February 7, 1995Assignee: L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges ClaudeInventors: Denis Chretien, Jean-Louis Girault, Bernard Darredeau
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Patent number: 5323616Abstract: Compressed air, feeding a unit for the separation of gases present in air, releases calories to a refrigerating unit which operates by absorption while cooling a flow of liquid in heat exchange relationship with a gas of the apparatus to cool the latter so as to ensure a reduction of the global energy consumption of the apparatus.Type: GrantFiled: November 30, 1993Date of Patent: June 28, 1994Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges ClaudeInventors: Denis Chretien, Philippe Mazieres
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Patent number: 5137547Abstract: Process for manufacturing a gas component in pure form by separation through adsorption from other components of a gas mixture including inter alia combustible components, of the type in which a flow of the gas mixture at a high cycle pressure is sent through an adsorbent which gives, during a production stage, at the high cycle pressure, the gaseous component which is not adsorbed, for example pure hydrogen, then, during a desorption-elution stage, a desorption gas or residual gas under a low cycle pressure, which is added, after having raised its pressure, to a network of auxiliary gas, which is available under higher pressure, the addition of the residual gas to the auxiliary gas being carried out by sending the residual gas into an ejector which operates under the effect of a driving gas normally available under high pressure.Type: GrantFiled: June 24, 1991Date of Patent: August 11, 1992Assignee: L'Air Liquide, Societe Anonyme pour L'Exploitation des Procedes Georges ClaudeInventor: Denis Chretien
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Patent number: 5053067Abstract: Part of the hydrogen from the gas treated, which is for example a residual gas from petroleum refinery, is first removed. The remaining mixture is introduced at an intermediate level of a distillation column which includes a head condenser operating at a temperature TF of the order of -40.degree. C. or more. The hydrogen content of said remaining mixture is selected so that the dew point of the residual gas which is removed at the top of the column is slightly higher than the temperature TF. The heavy hydrocarbons are collected at the base of the column.Type: GrantFiled: March 9, 1990Date of Patent: October 1, 1991Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges ClaudeInventor: Denis Chretien