JP2011508031A - 低沸点成分を炭化水素混合物から分離するための方法および装置 - Google Patents
低沸点成分を炭化水素混合物から分離するための方法および装置 Download PDFInfo
- Publication number
- JP2011508031A JP2011508031A JP2010540068A JP2010540068A JP2011508031A JP 2011508031 A JP2011508031 A JP 2011508031A JP 2010540068 A JP2010540068 A JP 2010540068A JP 2010540068 A JP2010540068 A JP 2010540068A JP 2011508031 A JP2011508031 A JP 2011508031A
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- Prior art keywords
- boiling fraction
- temperature level
- low
- stage
- condensation stage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/09—Purification; Separation; Use of additives by fractional condensation
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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
- F25J3/0204—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
- F25J3/0219—Refinery gas, cracking gas, coke oven gas, gaseous mixtures containing aliphatic unsaturated CnHm or gaseous mixtures of undefined nature
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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
- F25J3/0233—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 CnHm with 1 carbon atom or more
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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
- F25J3/0238—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 CnHm with 2 carbon atoms or more
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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
- F25J3/0242—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 CnHm with 3 carbon atoms or more
-
- 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
- F25J3/0252—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 hydrogen
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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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/02—Processes or apparatus using separation by rectification in a single pressure main column system
-
- 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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/50—Processes or apparatus using separation by rectification using multiple (re-)boiler-condensers at different heights of the column
-
- 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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/74—Refluxing the column with at least a part of the partially condensed overhead gas
-
- 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
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/62—Ethane or ethylene
-
- 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
- F25J2270/00—Refrigeration techniques used
- F25J2270/04—Internal refrigeration with work-producing gas expansion loop
-
- 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
- F25J2270/00—Refrigeration techniques used
- F25J2270/12—External refrigeration with liquid vaporising loop
-
- 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
- F25J2270/00—Refrigeration techniques used
- F25J2270/60—Closed external refrigeration cycle with single component refrigerant [SCR], e.g. C1-, C2- or C3-hydrocarbons
-
- 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
- F25J2270/00—Refrigeration techniques used
- F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
-
- 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
- F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
- F25J2290/40—Vertical layout or arrangement of cold equipments within in the cold box, e.g. columns, condensers, heat exchangers etc.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Water Supply & Treatment (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007063347A DE102007063347A1 (de) | 2007-12-28 | 2007-12-28 | Verfahren zur Abtrennung von leichtsiedenden Komponenten aus einem Kohlenwasserstoffstrom |
PCT/EP2008/011049 WO2009083227A2 (fr) | 2007-12-28 | 2008-12-22 | Procédé et dispositif pour séparer des constituants à point d'ébullition bas de mélanges d'hydrocarbures |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2011508031A true JP2011508031A (ja) | 2011-03-10 |
JP2011508031A5 JP2011508031A5 (fr) | 2011-11-24 |
Family
ID=40690838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010540068A Withdrawn JP2011508031A (ja) | 2007-12-28 | 2008-12-22 | 低沸点成分を炭化水素混合物から分離するための方法および装置 |
Country Status (12)
Country | Link |
---|---|
US (1) | US20110041550A1 (fr) |
EP (1) | EP2225007A2 (fr) |
JP (1) | JP2011508031A (fr) |
KR (1) | KR20100125228A (fr) |
CN (1) | CN101932368A (fr) |
BR (1) | BRPI0821955A2 (fr) |
CA (1) | CA2710776A1 (fr) |
DE (1) | DE102007063347A1 (fr) |
EA (1) | EA201070803A1 (fr) |
MX (1) | MX2010007195A (fr) |
WO (1) | WO2009083227A2 (fr) |
ZA (1) | ZA201004516B (fr) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2969746B1 (fr) | 2010-12-23 | 2014-12-05 | Air Liquide | Condensation d'un premier fluide a l'aide d'un deuxieme fluide |
US10852060B2 (en) * | 2011-04-08 | 2020-12-01 | Pilot Energy Solutions, Llc | Single-unit gas separation process having expanded, post-separation vent stream |
RU2703249C1 (ru) * | 2015-12-18 | 2019-10-15 | Бектел Гидрокарбон Текнолоджи Солушенз, Инк. | Системы и способы для извлечения целевых легких углеводородов из газообразных отходов рафинирования с использованием турбодетандера в оконечной части систем |
WO2018037330A1 (fr) * | 2016-08-25 | 2018-03-01 | Sabic Global Technologies B.V. | Procédé de séparation cryogénique pour effluent de réacteur de déshydrogénation de propane |
CN109722267A (zh) * | 2017-10-31 | 2019-05-07 | 珠海市启夏能源科技有限公司 | 一种塔罐组合式凝析油气化系统及其生产工艺 |
CN111545086B (zh) * | 2020-05-27 | 2021-11-09 | 新疆大学 | 一种可逆开关型泡沫体系及其制备方法 |
FR3123967B1 (fr) | 2021-06-09 | 2023-04-28 | Air Liquide | Procédé de séparation et de liquéfaction du méthane et du dioxyde de carbone avec solidification du dioxyde de carbone à l’extérieur de la colonne de distillation. |
FR3123969B1 (fr) | 2021-06-09 | 2023-04-28 | Air Liquide | Procédé de séparation et de liquéfaction du méthane et du dioxyde de carbone avec pré-séparation en amont de la colonne de distillation |
FR3123973B1 (fr) | 2021-06-09 | 2023-04-28 | Air Liquide | Purification cryogénique de biogaz avec pré-séparation et solidification externe de dioxyde de carbone |
FR3123971B1 (fr) * | 2021-06-09 | 2023-04-28 | Air Liquide | Purification cryogénique de biogaz avec soutirage à un étage intermédiaire et solidification externe de dioxyde de carbone. |
FR3123968B1 (fr) * | 2021-06-09 | 2023-04-28 | Air Liquide | Procédé de séparation et de liquéfaction du méthane et du CO2 comprenant le soutirage de vapeur d’un étage intermédiaire de la colonne de distillation |
FR3146514A3 (fr) | 2023-03-10 | 2024-09-13 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procédé et appareil de séparation par distillation cryogénique d’un mélange d’hydrogène, du propane et/ou du propylène et d’au moins un autre hydrocarbure |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3444696A (en) * | 1967-02-10 | 1969-05-20 | Stone & Webster Eng Corp | Demethanization employing different temperature level refrigerants |
IT1058546B (it) * | 1976-03-26 | 1982-05-10 | Snam Progetti | Processo per il frazoonamento mediante refrigerazione dei gas di cracking negli impianti per la produzione di etilene |
GB2205933A (en) * | 1987-06-12 | 1988-12-21 | Costain Petrocarbon | Separation of hydrocarbon mixtures |
IT1241471B (it) * | 1990-07-06 | 1994-01-17 | Tpl | Processo ed apparecchiatura per il massimo recupero dell'etilene e del propilene dal gas prodotto dalla pirolisi di idrocarburi. |
US5361589A (en) * | 1994-02-04 | 1994-11-08 | Air Products And Chemicals, Inc. | Precooling for ethylene recovery in dual demethanizer fractionation systems |
US6560989B1 (en) * | 2002-06-07 | 2003-05-13 | Air Products And Chemicals, Inc. | Separation of hydrogen-hydrocarbon gas mixtures using closed-loop gas expander refrigeration |
US20070062216A1 (en) * | 2003-08-13 | 2007-03-22 | John Mak | Liquefied natural gas regasification configuration and method |
-
2007
- 2007-12-28 DE DE102007063347A patent/DE102007063347A1/de not_active Ceased
-
2008
- 2008-12-22 EP EP08867264A patent/EP2225007A2/fr not_active Withdrawn
- 2008-12-22 CA CA2710776A patent/CA2710776A1/fr not_active Abandoned
- 2008-12-22 WO PCT/EP2008/011049 patent/WO2009083227A2/fr active Application Filing
- 2008-12-22 BR BRPI0821955-9A patent/BRPI0821955A2/pt not_active IP Right Cessation
- 2008-12-22 US US12/735,255 patent/US20110041550A1/en not_active Abandoned
- 2008-12-22 EA EA201070803A patent/EA201070803A1/ru unknown
- 2008-12-22 KR KR1020107016026A patent/KR20100125228A/ko not_active Application Discontinuation
- 2008-12-22 JP JP2010540068A patent/JP2011508031A/ja not_active Withdrawn
- 2008-12-22 MX MX2010007195A patent/MX2010007195A/es not_active Application Discontinuation
- 2008-12-22 CN CN2008801258704A patent/CN101932368A/zh active Pending
-
2010
- 2010-06-25 ZA ZA2010/04516A patent/ZA201004516B/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN101932368A (zh) | 2010-12-29 |
CA2710776A1 (fr) | 2009-07-09 |
DE102007063347A1 (de) | 2009-07-02 |
KR20100125228A (ko) | 2010-11-30 |
MX2010007195A (es) | 2010-09-30 |
BRPI0821955A2 (pt) | 2015-06-23 |
EA201070803A1 (ru) | 2011-02-28 |
WO2009083227A2 (fr) | 2009-07-09 |
ZA201004516B (en) | 2011-03-30 |
WO2009083227A3 (fr) | 2009-09-17 |
EP2225007A2 (fr) | 2010-09-08 |
US20110041550A1 (en) | 2011-02-24 |
WO2009083227A9 (fr) | 2009-11-05 |
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