BR0205687A - Processo de liquefação e de desnitrogenação de um gás natural, gás natural liquefeito, nitrogênio gasoso, e, instalação de liquefação e de desnitrogenação de um gás natural - Google Patents
Processo de liquefação e de desnitrogenação de um gás natural, gás natural liquefeito, nitrogênio gasoso, e, instalação de liquefação e de desnitrogenação de um gás naturalInfo
- Publication number
- BR0205687A BR0205687A BR0205687-9A BR0205687A BR0205687A BR 0205687 A BR0205687 A BR 0205687A BR 0205687 A BR0205687 A BR 0205687A BR 0205687 A BR0205687 A BR 0205687A
- Authority
- BR
- Brazil
- Prior art keywords
- natural gas
- liquefaction
- denitrogenation
- nitrogen
- gas
- Prior art date
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title abstract 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title abstract 7
- 239000003345 natural gas Substances 0.000 title abstract 7
- 238000000034 method Methods 0.000 title abstract 5
- 238000009434 installation Methods 0.000 title abstract 3
- 239000003949 liquefied natural gas Substances 0.000 title abstract 3
- 229910001873 dinitrogen Inorganic materials 0.000 title 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 3
- 239000007789 gas Substances 0.000 abstract 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
- F25J3/028—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of noble gases
- F25J3/029—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of noble gases of helium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0022—Hydrocarbons, e.g. natural gas
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- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
- F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
- F25J1/004—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
- F25J1/0042—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by liquid expansion with extraction of work
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F25J1/0057—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream after expansion of the liquid refrigerant stream with extraction of work
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- F25J1/0211—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle
- F25J1/0217—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle as at least a three level refrigeration cascade with at least one MCR cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
- F25J1/0281—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc. characterised by the type of prime driver, e.g. hot gas expander
- F25J1/0284—Electrical motor as the prime mechanical driver
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- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
- F25J1/0292—Refrigerant compression by cold or cryogenic suction of the refrigerant gas
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- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
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- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
- F25J1/0295—Shifting of the compression load between different cooling stages within a refrigerant cycle or within a cascade refrigeration system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
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- F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
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- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
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- F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
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- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
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- F25J3/0257—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of nitrogen
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- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S62/00—Refrigeration
- Y10S62/927—Natural gas from nitrogen
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
"PROCESSO DE LIQUEFAçãO E DE DESNITROGENAçãO DE UM GáS NATURAL, GáS NATURAL LIQUEFEITO, NITROGêNIO GASOSO, E, INSTALAçãO DE LIQUEFAçãO E DE DESNITROGENAçãO DE UM GáS NATURAL". Processo de liquefação e de desnitrogenação de gás natural, instalação de execução, e gás obtidos por essa separação. A invenção se refere a um processo de liquefação e de desnitrogenação de gás natural (1) que contém nitrogênio, no qual o dito gás natural (1) é resfriado, liquefeito e separado em uma primeira fração de topo (9) relativamente mais volátil enriquecida em nitrogênio, e em uma primeira fração de fundo (15). O processo é caracterizado pelo fato de que a primeira fração de topo (9) é resfriada e liquefeita, separada em uma segunda fração de topo (11) relativamente mais volátil que fornece nitrogênio gasoso (29), e em uma segunda fração de fundo (12) que é tratada de novo, e pelo fato de que a primeira fração de fundo (15) é resfriada para fornecer gás natural liquefeito essencialmente isento de nitrogênio (24). Outros modos de realização são descritos.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0108883A FR2826969B1 (fr) | 2001-07-04 | 2001-07-04 | Procede de liquefaction et de deazotation de gaz naturel, installation de mise en oeuvre, et gaz obtenus par cette separation |
PCT/FR2002/002242 WO2003004951A1 (fr) | 2001-07-04 | 2002-06-27 | Procede de liquefaction et de deazotation de gaz naturel, installation de mise en oeuvre |
Publications (2)
Publication Number | Publication Date |
---|---|
BR0205687A true BR0205687A (pt) | 2003-07-22 |
BR0205687B1 BR0205687B1 (pt) | 2011-04-05 |
Family
ID=8865126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BRPI0205687-9A BR0205687B1 (pt) | 2001-07-04 | 2002-06-27 | processo de liquefação e de desnitrogenação de um gás natural, gás natural liquefeito, nitrogênio gasoso, e, instalação de liquefação e de desnitrogenação de um gás natural. |
Country Status (9)
Country | Link |
---|---|
US (1) | US6449984B1 (pt) |
EP (1) | EP1273860A3 (pt) |
AU (1) | AU2002313528B2 (pt) |
BR (1) | BR0205687B1 (pt) |
EA (1) | EA004127B1 (pt) |
FR (1) | FR2826969B1 (pt) |
MY (1) | MY133472A (pt) |
NO (1) | NO20030581L (pt) |
WO (1) | WO2003004951A1 (pt) |
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MY140540A (en) * | 2004-07-12 | 2009-12-31 | Shell Int Research | Treating liquefied natural gas |
RU2272973C1 (ru) * | 2004-09-24 | 2006-03-27 | Салават Зайнетдинович Имаев | Способ низкотемпературной сепарации газа (варианты) |
DE102004054674A1 (de) * | 2004-11-12 | 2006-05-24 | Linde Ag | Verfahren zum Verflüssigen eines Kohlenwasserstoff-reichen Stromes |
US20080173043A1 (en) * | 2005-03-09 | 2008-07-24 | Sander Kaart | Method For the Liquefaction of a Hydrocarbon-Rich Stream |
EP1715267A1 (en) * | 2005-04-22 | 2006-10-25 | Air Products And Chemicals, Inc. | Dual stage nitrogen rejection from liquefied natural gas |
DE102005029275A1 (de) * | 2005-06-23 | 2006-12-28 | Linde Ag | Verfahren zum Verflüssigen eines Kohlenwasserstoff-reichen Stromes |
FR2891900B1 (fr) * | 2005-10-10 | 2008-01-04 | Technip France Sa | Procede de traitement d'un courant de gnl obtenu par refroidissement au moyen d'un premier cycle de refrigeration et installation associee. |
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WO2008034875A2 (en) * | 2006-09-22 | 2008-03-27 | Shell Internationale Research Maatschappij B.V. | Method and apparatus for liquefying a hydrocarbon stream |
RU2467268C2 (ru) * | 2007-01-25 | 2012-11-20 | Шелл Интернэшнл Рисерч Маатсхаппий Б.В. | Способ и устройство для охлаждения углеводородного потока |
FR2932876B1 (fr) * | 2008-06-20 | 2013-09-27 | Inst Francais Du Petrole | Procede de liquefaction d'un gaz naturel avec pre-refroidissement du melange refrigerant |
US20110239701A1 (en) * | 2008-11-03 | 2011-10-06 | Sander Kaart | Method of rejecting nitrogen from a hydrocarbon stream to provide a fuel gas stream and an apparatus therefor |
GB2455462B (en) * | 2009-03-25 | 2010-01-06 | Costain Oil Gas & Process Ltd | Process and apparatus for separation of hydrocarbons and nitrogen |
CN101644527B (zh) * | 2009-08-26 | 2011-12-28 | 四川空分设备(集团)有限责任公司 | 天然气液化工艺的制冷***和液化*** |
FR2957407B1 (fr) * | 2010-03-15 | 2012-08-17 | Inst Francais Du Petrole | Procede de liquefaction d'un gaz naturel avec des melanges refrigerants contenant au moins un hydrocarbure insature |
US9441877B2 (en) | 2010-03-17 | 2016-09-13 | Chart Inc. | Integrated pre-cooled mixed refrigerant system and method |
CN103031168B (zh) * | 2011-09-30 | 2014-10-15 | 新地能源工程技术有限公司 | 从富含甲烷的混合气体中生产液化天然气的脱水脱重烃工艺 |
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US11408673B2 (en) | 2013-03-15 | 2022-08-09 | Chart Energy & Chemicals, Inc. | Mixed refrigerant system and method |
US11428463B2 (en) | 2013-03-15 | 2022-08-30 | Chart Energy & Chemicals, Inc. | Mixed refrigerant system and method |
CN105473967B (zh) | 2013-03-15 | 2018-06-26 | 查特能源化工公司 | 混合制冷剂***和方法 |
AR105277A1 (es) | 2015-07-08 | 2017-09-20 | Chart Energy & Chemicals Inc | Sistema y método de refrigeración mixta |
FR3039080B1 (fr) * | 2015-07-23 | 2019-05-17 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Methode de purification d'un gaz riche en hydrocarbures |
EP3361196A1 (de) * | 2017-02-14 | 2018-08-15 | Linde Aktiengesellschaft | Verfahren zum verflüssigen einer kohlenwasserstoff-reichen fraktion |
FR3075939B1 (fr) * | 2017-12-21 | 2020-06-19 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede de production d'azote pur a partir d'un courant de gaz naturel contenant de l'azote |
FR3075940B1 (fr) * | 2017-12-21 | 2020-05-22 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede de liquefaction d'un courant de gaz naturel contenant de l'azote |
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IT201900008367A1 (it) * | 2019-06-07 | 2020-12-07 | Nuovo Pignone Tecnologie Srl | Un sistema di liquefazione di gas naturale |
CN110953841A (zh) * | 2019-12-17 | 2020-04-03 | 西安石油大学 | 一种基于三循环混合冷剂的天然气液化方法及装置 |
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-
2001
- 2001-07-04 FR FR0108883A patent/FR2826969B1/fr not_active Expired - Lifetime
- 2001-10-02 US US09/968,610 patent/US6449984B1/en not_active Expired - Lifetime
-
2002
- 2002-06-26 EP EP02291595A patent/EP1273860A3/fr not_active Withdrawn
- 2002-06-26 MY MYPI20022398A patent/MY133472A/en unknown
- 2002-06-27 WO PCT/FR2002/002242 patent/WO2003004951A1/fr active IP Right Grant
- 2002-06-27 AU AU2002313528A patent/AU2002313528B2/en not_active Ceased
- 2002-06-27 BR BRPI0205687-9A patent/BR0205687B1/pt not_active IP Right Cessation
- 2002-07-03 EA EA200200629A patent/EA004127B1/ru not_active IP Right Cessation
-
2003
- 2003-02-06 NO NO20030581A patent/NO20030581L/no not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
EA200200629A1 (ru) | 2003-02-27 |
WO2003004951A1 (fr) | 2003-01-16 |
FR2826969A1 (fr) | 2003-01-10 |
EA004127B1 (ru) | 2003-12-25 |
EP1273860A2 (fr) | 2003-01-08 |
NO20030581L (no) | 2003-04-16 |
BR0205687B1 (pt) | 2011-04-05 |
MY133472A (en) | 2007-11-30 |
AU2002313528B2 (en) | 2007-07-26 |
FR2826969B1 (fr) | 2006-12-15 |
EP1273860A3 (fr) | 2003-01-15 |
US6449984B1 (en) | 2002-09-17 |
NO20030581D0 (no) | 2003-02-06 |
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