WO2004094041A1 - Procede de traitement d'un melange gazeux comprenant du propane et du propylene - Google Patents
Procede de traitement d'un melange gazeux comprenant du propane et du propylene Download PDFInfo
- Publication number
- WO2004094041A1 WO2004094041A1 PCT/FR2004/050150 FR2004050150W WO2004094041A1 WO 2004094041 A1 WO2004094041 A1 WO 2004094041A1 FR 2004050150 W FR2004050150 W FR 2004050150W WO 2004094041 A1 WO2004094041 A1 WO 2004094041A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- propylene
- propane
- membrane
- hydrogen
- gas
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/225—Multiple stage diffusion
- B01D53/226—Multiple stage diffusion in serial connexion
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F10/04—Monomers containing three or four carbon atoms
- C08F10/06—Propene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/16—Hydrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/24—Hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7022—Aliphatic hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/04—Monomers containing three or four carbon atoms
- C08F110/06—Propene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F210/04—Monomers containing three or four carbon atoms
- C08F210/06—Propene
Definitions
- the present invention relates to a process for the separation of propane and propylene contained in a gas mixture.
- the polymerization reaction of propylene to obtain polypropylene generally uses:
- an agent controlling the length of the polymer chains such as hydrogen
- the unreacted propylene is usually recycled to the inlet of the polymerization reactor.
- This recycling goes through a step of cooling or condensing the effluent from the polymerization reactor, so as to maintain a constant reaction temperature.
- the propylene is recycled with other components of the reactor effluent such as hydrogen, propane and nitrogen.
- the recycling of propylene is supplemented by a very rich and very pure addition of propylene. Although this make-up is very rich in propylene, inert substances, such as propane and nitrogen, or light compounds, such as hydrogen, accumulate in the recycling effluent, which considerably reduces productivity. of the polymerization unit.
- the recycling loop is from time to time discharged of these substances by purging. That is to say, part of the recycling loop is sent to a monomer recovery unit or flared.
- This purging operation has the disadvantage of reducing the profitability of the polymerization process since either an additional unit is dedicated to recovering the propylene, or the propylene is lost by flaring.
- the membrane makes it possible to obtain 1) a retentate enriched in propane which can thus be eliminated from the recycling loop and 2) a permeate enriched in propylene which can be recycled to the polymerization reactor.
- the losses of propylene are therefore limited compared to the prior art and the productivity of the polymerization process is improved.
- the disadvantage of this solution is that the membranes described in US-B1-6,271, 319 are made of materials chosen from polyimides, polyphenylene oxides and perfluorinated polymers, which are slightly permeable to propylene. Consequently, for a given installed membrane surface, the recovery rate of propylene remains low.
- the object of the present invention is to provide a process for improving the proprylene / propane separation by permeation, in particular in propylene polymerization units.
- Another object is to provide a method for improving the propylene / propane separation by permeation in propylene polymerization units so as to increase the productivity of manufacturing polypropylene.
- the invention relates to a method of treating a gas mixture comprising at least propylene, propane so as to separate propylene from propane, in which the gas mixture is brought into contact with a membrane (M1). ensuring the selective permeation of propylene with respect to propane so as to obtain a permeate enriched in propylene and a retentate enriched in propane, characterized in that the concentration of propylene of the permeate in the membrane is reduced by means of a gas scanning.
- the invention also relates to a process for the polymerization of polypropylene, comprising the following steps: a) polymerization of propylene, b) recovery of an effluent from step a) and comprising at least polypropylene, propane and propylene, c) treatment of the effluent from step b) so as to produce a solid effluent comprising at least polypropylene and a gaseous effluent comprising at least propane and propylene, d) treatment of the gaseous effluent from step b) or coming from the propylene recovery section so as to separate the propylene from the propane, in which the gas mixture is brought into contact with a membrane (M 1) ensuring the selective permeation of the propylene with respect to the propane obtaining a propylene-enriched permeate and a propane-enriched retentate, characterized in that the propylene concentration of the permeate in the membrane is reduced by means of a sweeping gas, e) recycling the permeate
- - Figure 1 is a schematic view of a method according to the invention
- - Figure 2 is a schematic view of a particular mode of the method according to the invention.
- the invention therefore relates first of all to a process for treating a gas mixture comprising at least propylene and propane so as to separate propylene from propane, in which the gas mixture is brought into contact with a membrane (M1 ) ensuring the selective permeation of propylene with respect to propane so as to obtain a permeate enriched in propylene and a retentate enriched in propane, characterized in that the concentration of propylene of the permeate in the membrane is reduced by means of a gas of scanning.
- M1 membrane
- the method according to the invention relates to the treatment of a gas mixture comprising at least propylene and propane.
- the proportions of these two compounds in the mixture can be variable and are generally between 5% by mass and 25% by mass for propane and 75% by mass and 95% by mass for propylene.
- This gas mixture can comprise other compounds such as hydrogen, nitrogen, in proportions of the order of 10% and 15% by mass respectively.
- This gaseous mixture resulting from the polymerization reaction or from the propylene recovery unit usually has a pressure of between 10 bars and 45 bars.
- the separation of propylene and propane from the gas mixture is obtained by a permeation process, that is to say by contacting the gas mixture with a membrane (M1) ensuring the selective permeation of propylene relative to propane.
- M1 membrane
- the membrane (M1) is preferably made of a material chosen from polyimides and perfluorinated polymers.
- the propylene preferentially crosses the membrane and is recovered from the low pressure side forming the permylene enriched in propylene, that is to say which has a higher propylene concentration than the gas mixture to be treated.
- the propane preferably remains on the high pressure side of the membrane and forms the retentate enriched in propane, that is to say which has a higher propane concentration than the gaseous mixture to be treated.
- the propylene concentration of the permeate within the membrane is reduced by bringing a sweeping gas into contact with the low pressure side of the membrane (permeate side).
- the purge gas is usually introduced against the flow of the gas mixture to be treated.
- the purge gas increases the partial pressure gradient of propylene on either side of the membrane and thereby improves the productivity of the membrane.
- the sweep gas does not contain propylene and is preferably ethylene.
- the process according to the invention can particularly be implemented during a process for the polymerization of polypropylene; in this case, the sweeping gas is advantageously a gas comprising ethylene (of purity, for example, greater than 99% by mass), in particular if ethylene is used as co-monomer during one of the reactions of copolymerization of polypropylene.
- the sweeping gas is advantageously a gas comprising ethylene (of purity, for example, greater than 99% by mass), in particular if ethylene is used as co-monomer during one of the reactions of copolymerization of polypropylene.
- This particular implementation makes it possible to improve the efficiency of the propylene / propane separation while ensuring the premixing of the monomer, propylene, and of the comonomer, upstream of the polymerization reactor.
- the gaseous mixture to be treated when the gaseous mixture to be treated also comprises hydrogen, before the step of bringing the gaseous mixture into contact with the membrane (M1) ensuring the selective permeation of the propylene relative to propane, the gas mixture can be brought into contact with a membrane (M2) ensuring the selective permeation of hydrogen with respect to propane and propylene so as to obtain a permeate enriched in hydrogen and a retentate enriched in propylene and propane.
- M1 ensuring the selective permeation of the propylene relative to propane
- M2 ensuring the selective permeation of hydrogen with respect to propane and propylene so as to obtain a permeate enriched in hydrogen and a retentate enriched in propylene and propane.
- the membrane (M2) ensuring the selective permeation of hydrogen usually consists of a material chosen from polyamides or polyimides.
- the membrane (M2) is in the form of hollow fibers grouped in bundles forming a permeation module.
- the hydrogen concentration on the permeate side is reduced in the membrane (M2) ensuring the selective permeation of the hydrogen by means of a sweeping gas.
- the hydrogen concentration of the permeate within the membrane (M2) is reduced by contacting the purging gas, preferably nitrogen or any other effluent that does not contain hydrogen), with the low pressure side of the membrane (M2) (permeate side).
- the purge gas is usually introduced against the flow of the gas mixture to be treated.
- the purging gas increases the partial pressure gradient of hydrogen on either side of the membrane (M2) and thereby improves the productivity of the membrane.
- This particular implementation (combination of the two membranes M1 and M2) makes it possible to eliminate both propane and hydrogen from the gas mixture while minimizing the losses of hydrogen.
- the invention also relates to a process for the polymerization of polypropylene comprising the following steps: a) polymerization of propylene, b) recovery of an effluent from step a) and comprising at least polypropylene, propane and propylene, c ) treatment of the effluent from step b) so as to produce a solid effluent comprising at least polypropylene and a gaseous effluent comprising at least propane and propylene, d) treatment of the gaseous effluent from step b), or coming from the propylene recovery unit so as to separate propylene from propane, in which the gas mixture (1) is brought into contact with a membrane (M1) ensuring the selective permeation of propylene with respect to propane so as to obtain a permeate (2) enriched in propylene and a retentate (3) enriched in propane, characterized in that the propylene concentration of the permeate in the membrane is diluted by means of a sweeping gas (4) , e
- the effluent from the polymerization reactor is generally treated during a cooling or condensation step b)
- the gas phase comprises at least propylene and propane, and is then treated by the treatment process defined previously and possibly by its preferred and particular modes.
- the membrane (M1) can be made of a material chosen from polyimides and perfluorinated polymers
- the sweep gas (4) can be a gas comprising ethylene or any other effluent not containing propylene,
- the gaseous effluent (1) from step c) or from the propylene recovery unit can also include hydrogen and during the step of bringing the gaseous effluent into contact (1) with the membrane (M1) ensuring the selective permeation of propylene with respect to propane, the gaseous effluent (1) can be brought into contact with a membrane (M2) ensuring the selective permeation of hydrogen with respect to propane and propylene so as to obtain a permeate (5) enriched in hydrogen and a retentate enriched in propylene and propane (6), the membrane (M2) ensuring the selective permeation of the hydrogen can be made of a material chosen from polyamides or polyimides,
- the hydrogen concentration of the permeate in the membrane (M2) can be reduced ensuring the selective permeation of the hydrogen by means of a purging gas (7)
- the purging gas (7) used during the selective permeation of hydrogen may be a gas comprising nitrogen, or any other effluent not containing hydrogen.
- step a) can be a copolymerization step of polypropylene.
- the sweep gas (4) is advantageously a gas comprising ethylene.
- the effluent (1) from step c) can be mixed with a gaseous effluent (1 ') from the successive sequence of a step a') of copolymerization of polypropylene, then of a step b ') of recovery of the effluent from step a') and comprising at least polypropylene, propane and and propylene, then of a step c ') of treatment of the effluent from step b ') so as to produce a solid effluent comprising at least polypropylene and the gaseous effluent (1') comprising at least propane and propylene.
- This implementation is suitable for the case of a propylene copolymerization process.
- the membrane (M1) can treat a mixture of at least two gaseous effluents (1) and (1 ') originating on the one hand from the homopolymerization section of propylene, and on the other hand from a section of copolymerization of propylene.
- the permeate (3) from the membrane can then be recycled in the propylene copolymerization step.
- Propane separated from propylene is usually removed from the process and sent to the process fuel gas network or to the flare.
- the propylene recovered on the permeate side of the M1 membrane is generally recompressed via existing compressors or via a new compressor before being introduced into the copolymerization section.
- Figures 1 and 2 illustrate the implementation of the method according to the invention and more particularly the operation of the membranes.
- Figure 1 illustrates the operation of the membrane (M1) ensuring the selective permeation of propylene relative to propane.
- the gas mixture (1) comprising at least propylene and propane, and optionally hydrogen and / or nitrogen, is introduced on the side of the membrane (M1) having the highest pressure.
- a purge gas (4) having a lower pressure than the gas mixture (1) is introduced against the flow of the gas mixture (1) and on the permeate side of the membrane. It emerges from the membrane: on the one hand, on the side of the highest pressure, the retentate (2) enriched in propane relative to the gas mixture (1),
- FIG. 2 illustrates the operation of the membranes (M1) and (M2) ensuring the permeation of propane and hydrogen from the gas mixture comprising propylene, propane and hydrogen.
- the gas mixture (1) and / or (1 ') comprising at least propylene, hydrogen and propane is introduced on the side of the membrane (M2) having the highest pressure.
- a purge gas (7) having a lower pressure than the gas mixture (1) is introduced against the flow of the gas mixture (1) and on the permeate side of the membrane. It emerges from the membrane (M2):
- the productivity of a Ziegler-Natta type catalyst could be increased from 0.5 to 2%, corresponding to additional quantities of polypropylene resin produced, (approximately 2500 tonnes of resin for a polypropylene unit with a capacity of 250 ktonne / year) while reducing propylene losses.
- the implementation of the process according to the invention also has the advantage of allowing the recovery rate of propylene to be controlled by controlling the flow rate of sweeping gas, unlike the membrane processes of the prior art in which the recovery rate depended on the membrane surface installed for a given permeate pressure.
- the sweeping gas also makes it possible to solve the problems of aging of the membranes (longer life).
- the particular mode of implementation of the method according to the invention has the advantage of improving the efficiency of the propylene / propane separation by permeation while allowing separation of the hydrogen.
- a sweeping gas rich in ethylene or a propylene comonomer makes it possible to improve the efficiency of the propylene / propane separation while ensuring the premixing of the monomer (propylene) and of the ethylene or of the monomer ( propylene) and the comonomer upstream of the copolymerization reactor.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2004800120879A CN1784260B (zh) | 2003-04-18 | 2004-04-07 | 包含丙烷和丙烯的气体混合物的处理方法 |
EP04742837A EP1617932A1 (fr) | 2003-04-18 | 2004-04-07 | Procede de traitement d'un melange gazeux comprenant du propane et du propylene |
CA2522599A CA2522599C (fr) | 2003-04-18 | 2004-04-07 | Procede de traitement d'un melange gazeux comprenant du propane et du propylene |
US10/553,545 US7497896B2 (en) | 2003-04-18 | 2004-04-07 | Method of treating a gas mixture comprising propane and propylene |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0304865A FR2853899B1 (fr) | 2003-04-18 | 2003-04-18 | Procede de traitement d'un melange gazeux comprenant du propane et du propylene |
FR0304865 | 2003-04-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004094041A1 true WO2004094041A1 (fr) | 2004-11-04 |
Family
ID=33041965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2004/050150 WO2004094041A1 (fr) | 2003-04-18 | 2004-04-07 | Procede de traitement d'un melange gazeux comprenant du propane et du propylene |
Country Status (6)
Country | Link |
---|---|
US (1) | US7497896B2 (fr) |
EP (1) | EP1617932A1 (fr) |
CN (1) | CN1784260B (fr) |
CA (1) | CA2522599C (fr) |
FR (1) | FR2853899B1 (fr) |
WO (1) | WO2004094041A1 (fr) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100503008C (zh) * | 2007-02-06 | 2009-06-24 | 天邦膜技术国家工程研究中心有限责任公司 | 用于气体分离的耦合膜分离方法及装置 |
FR2926813B1 (fr) * | 2008-01-28 | 2011-10-21 | Inst Francais Du Petrole | Procede de separation du propane et du propylene mettant en oeuvre une colonne a distiller et une unite de separation par membrane |
US8906143B2 (en) * | 2011-09-02 | 2014-12-09 | Membrane Technology And Research, Inc. | Membrane separation apparatus for fuel gas conditioning |
CN104144951A (zh) * | 2012-01-26 | 2014-11-12 | 道达尔研究技术弗吕公司 | 用于清除聚丙烯制造过程中的丙烷的方法 |
WO2014034910A1 (fr) | 2012-08-31 | 2014-03-06 | 日本碍子株式会社 | Procédé de recueil d'oléfine |
FI126341B (en) | 2015-09-18 | 2016-10-14 | Neste Oyj | Method for separating and purifying renewable propane |
JP7160804B2 (ja) * | 2016-11-04 | 2022-10-25 | ダウ グローバル テクノロジーズ エルエルシー | 改善されたポリイミド分離膜の作製方法 |
US10359577B2 (en) | 2017-06-28 | 2019-07-23 | Corning Research & Development Corporation | Multiports and optical connectors with rotationally discrete locking and keying features |
AU2017420801A1 (en) | 2017-06-28 | 2020-01-23 | Corning Research & Development Corporation | Multiports and devices having a connector port with a rotating securing feature |
US11187859B2 (en) | 2017-06-28 | 2021-11-30 | Corning Research & Development Corporation | Fiber optic connectors and methods of making the same |
SG11202008021TA (en) * | 2018-02-22 | 2020-09-29 | Borealis Ag | Process |
ES2903560T3 (es) * | 2019-02-26 | 2022-04-04 | Linde Gmbh | Método y sistema para la obtención de un producto de propileno |
WO2020242847A1 (fr) | 2019-05-31 | 2020-12-03 | Corning Research & Development Corporation | Multiports et autres dispositifs ayant ports de connexion optiques avec actionneurs coulissants et procédés de fabrication associés |
US11294133B2 (en) | 2019-07-31 | 2022-04-05 | Corning Research & Development Corporation | Fiber optic networks using multiports and cable assemblies with cable-to-connector orientation |
US11536921B2 (en) | 2020-02-11 | 2022-12-27 | Corning Research & Development Corporation | Fiber optic terminals having one or more loopback assemblies |
US11604320B2 (en) | 2020-09-30 | 2023-03-14 | Corning Research & Development Corporation | Connector assemblies for telecommunication enclosures |
US11927810B2 (en) | 2020-11-30 | 2024-03-12 | Corning Research & Development Corporation | Fiber optic adapter assemblies including a conversion housing and a release member |
US11994722B2 (en) | 2020-11-30 | 2024-05-28 | Corning Research & Development Corporation | Fiber optic adapter assemblies including an adapter housing and a locking housing |
US11686913B2 (en) | 2020-11-30 | 2023-06-27 | Corning Research & Development Corporation | Fiber optic cable assemblies and connector assemblies having a crimp ring and crimp body and methods of fabricating the same |
US11880076B2 (en) | 2020-11-30 | 2024-01-23 | Corning Research & Development Corporation | Fiber optic adapter assemblies including a conversion housing and a release housing |
EP4424723A1 (fr) | 2023-02-28 | 2024-09-04 | Lummus Novolen Technology Gmbh | Production de polypropylène à l'aide d'un flux de propylène comprenant du propane |
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CA2426629C (fr) * | 2003-04-25 | 2012-09-25 | Nova Chemicals Corporation | Processus de separation des olefines des paraffines a l'aide de membranes |
-
2003
- 2003-04-18 FR FR0304865A patent/FR2853899B1/fr not_active Expired - Fee Related
-
2004
- 2004-04-07 CN CN2004800120879A patent/CN1784260B/zh not_active Expired - Lifetime
- 2004-04-07 CA CA2522599A patent/CA2522599C/fr not_active Expired - Lifetime
- 2004-04-07 WO PCT/FR2004/050150 patent/WO2004094041A1/fr not_active Application Discontinuation
- 2004-04-07 US US10/553,545 patent/US7497896B2/en active Active
- 2004-04-07 EP EP04742837A patent/EP1617932A1/fr not_active Withdrawn
Patent Citations (7)
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US4750918A (en) * | 1985-05-28 | 1988-06-14 | The Trustees Of The Stevens Institute Of Technology | Selective-permeation gas-separation process and apparatus |
EP0582184A1 (fr) * | 1992-08-03 | 1994-02-09 | Air Products And Chemicals, Inc. | Récupération d'hydrogène à l'aide de membranes adsorbantes |
EP0701856A1 (fr) * | 1994-09-14 | 1996-03-20 | Bend Research, Inc. | Perméation de vapeurs organiques et inorganiques à l'aide d'un balayage condensable à contre-courant |
EP0753337A2 (fr) * | 1995-07-12 | 1997-01-15 | Bend Research, Inc. | Membranes à fibres creuses perméables à la vapeur et modules |
US5670051A (en) * | 1996-05-23 | 1997-09-23 | Membrane Technology And Research, Inc. | Olefin separation membrane and process |
US6361582B1 (en) * | 2000-05-19 | 2002-03-26 | Membrane Technology And Research, Inc. | Gas separation using C3+ hydrocarbon-resistant membranes |
US6271319B1 (en) * | 2000-08-30 | 2001-08-07 | Membrane Technology And Research, Inc. | Membrane-augmented polypropylene manufacturing |
Also Published As
Publication number | Publication date |
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US7497896B2 (en) | 2009-03-03 |
FR2853899B1 (fr) | 2007-12-28 |
CN1784260A (zh) | 2006-06-07 |
EP1617932A1 (fr) | 2006-01-25 |
CN1784260B (zh) | 2010-11-24 |
US20060266213A1 (en) | 2006-11-30 |
CA2522599A1 (fr) | 2004-11-04 |
CA2522599C (fr) | 2011-10-18 |
FR2853899A1 (fr) | 2004-10-22 |
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