[특허]Ethylene/nitrogen separation process

Ethylene/nitrogen separation process 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-053/22
출원번호	US-0907187 (1997-08-06)
발명자 / 주소	Baker Richard W. Lokhandwala Kaaeid A. Pinnau Ingo
출원인 / 주소	Membrane Technology and Research, Inc.
대리인 / 주소	Farrant
인용정보	피인용 횟수 : 5 인용 특허 : 36

초록 ▼

A membrane separation process for treating a gas stream containing methane and nitrogen, for example, natural gas. The separation process works by preferentially permeating methane and rejecting nitrogen. We have found that the process is able to meet natural gas pipeline specifications for nitrogen, with acceptably small methane loss, so long as the membrane can exhibit a methane/nitrogen selectivity of about 4, 5 or more. This selectivity can be achieved with some rubbery and super-glassy membranes at low temperatures. The process can also be used for separating ethylene from nitrogen.

대표청구항 ▼

[ We claim:] [1.] A process for treating a gas stream comprising ethylene and nitrogen, said process comprising the following steps:(a) providing a membrane having a feed side and a permeate side, being selective for ethylene over nitrogen and comprising a polymer selected from the group consisting of (I) rubbery polymers having a glass transition temperature at least about 30.degree. C. below the temperature of step (b) and (II) polymers characterized by(i) a glass transition temperature of at least about 100.degree. C.;(ii) a free volume of at least about 10%: and(iii) an ethylene permeability at room temperature of at least about 1,000 Barrer;(b) passing said gas stream across the feed side of said membrane at a temperature at which the membrane exhibits a selectivity for ethylene over nitrogen of at least about 8;(c) withdrawing from said feed side a residue stream depleted in ethylene and enriched in nitrogen compared with said gas stream;(d) withdrawing from said permeate side a permeate stream enriched in ethylene and depleted in nitrogen compared with said gas stream.

이 특허에 인용된 특허 (36)

MacLean Donald L. (Annandale NJ) Krishnamurthy Ramachandran (Cranbury NJ) Lerner Steven L. (Berkeley Heights NJ), Argon recovery from ammonia plant purge gas utilizing a combination of cryogenic and non-cryogenic separating means.
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Maclean Donald L. (Annandale NJ) Krishnamurthy Ramachandran (Cranbury NJ) Lerner Steven L. (Berkeley Heights NJ), Argon recovery from hydrogen depleted ammonia plant purge gas utilizing a combination of cryogenic and non-cryogenic sep.
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Goddin ; Jr. Clifton S. (Tulsa OK) Turek Edward A. (Tulsa OK) George Boyd A. (Lisle IL), CO₂ removal from high CO₂ content hydrocarbon containing streams.
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Blume Ingo (Hengelo TX NLX) Pinnau Ingo (Austin TX), Composite membrane, method of preparation and use.
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Waldo Richard A. (Bartlesville OK) Burkinshaw Jeffrey R. (Bartlesville OK), Distillation plus membrane processing of gas streams.
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Moll David J. (Midland MI) Burmester Alan F. (Midland MI) Young Thomas C. (Walnut Creek CA) McReynolds Kent B. (Midland MI) Clark James E. (Midland MI) Hotz Charles Z. (Walnut Creek CA) Wessling Ritc, Gas separations utilizing glassy polymer membranes at sub-ambient temperatures.
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Toy Lora G. (San Francisco CA) Pinnau Ingo (Palo Alto CA) Baker Richard W. (Palo Alto CA), Gas-separation process.
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Prasad Ravi (East Amherst NY), High purity membrane nitrogen.
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Rao Madhukar B. (Allentown PA) Sircar Shivaji (Wescosville PA) Abrardo Joseph M. (Schnecksville PA) Baade William F. (Breinigsville PA), Hydrocarbon fractionation by adsorbent membranes.
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Doshi Kishore J. (Somers NY), Integrated pressure swing adsorption/membrane separation process.
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Baker Richard W. (Palo Alto CA) Wijmans Johannes G. (Menlo Park CA), Membrane process and apparatus for removing a component from a fluid stream.
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Wijmans Johannes G. (Menlo Park CA), Membrane process and apparatus for removing vapors from gas streams.
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Lucadamo Gene A. (Macungie PA), Membrane-aided distillation for carbon dioxide and hydrocarbon separation.
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Baker Richard W. (Palo Alto CA) Lokhandwala Kaaeid A. (Menlo Park CA) Pinnau Ingo (Palo Alto CA) Segelke Scott (Mountain View CA), Methane/nitrogen separation process.
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Kato Moritake (Tokyo JPX) Inoue Norio (Tokyo JPX) Shibuya Yoshiki (Tokyo JPX), Method for recovering hydrocarbon vapor.
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Behling Dieter (Hamburg DEX) Hattenbach Karl (Geesthacht DEX) Ohlrogge Klaus (Geesthacht DEX) Peinemann Klaus-Victor (Reinbek DEX) Wind Jan (Barsbttel DEX), Method of removing organic compounds from air/permanent gas mixtures.
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Valencia Jaime A. (Sugarland TX) Denton Robert D. (Houston TX), Method of separating acid gases, particularly carbon dioxide, from methane by the addition of a light gas such as helium.
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Toy Lora G. (San Francisco CA) Pinnau Ingo (Palo Alto CA), Natural gas treatment process using PTMSP membrane.
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Dinh Cong X. (214 Huggins Ferry Sugar Land TX 77479) Petterson William C. (2307 Fall Meadow Missouri City TX 77459) Rastogi Ashutosh (130 Asian Games Village New Delhi TX INX 110049) Verma Vijender K, Olefin recovery method.
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Anand Madhu (Allentown PA) Costello Christine A. (Easton PA) Campbell Keith D. (Slatington PA), Plasma-assisted polymerization of monomers onto polymers and gas separation membranes produced thereby.
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Higashimura Toshinobu (35 ; Kitashirakawa-Ioricho Sakyo-ku ; Kyoto JPX) Masuda Toshio (Otsu JPX) Takada Koichi (Honmachi JPX), Polymer and a membrane having an improved gas-permeability and selectivity.
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Burr Peter S. (Munich DEX), Process and apparatus for fractionation of a gaseous mixture employing side stream withdrawal, separation and recycle.
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Burr Peter S. (Munich DEX), Process for fractionation of a gaseous mixture employing side stream withdrawal, separation, and recycle.
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Auvil Steven R. (Macungie PA) Agrawal Rakesh (Allentown PA), Process for recovering hydrogen from a multi-component gas stream.
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Baker, Richard W., Process for recovering organic vapors from air.
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Kaschemekat Jrgen (Palo Alto CA) Baker Richard W. (Palo Alto CA) Wijmans Johannes G. (Menlo Park CA), Process for removing condensable components from gas streams.
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Kaschemekat Jrgen (Palo Alto CA) Baker Richard W. (Palo Alto CA) Wijmans Johannes G. (Menlo Park CA), Process for removing condensable components from gas streams.
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Wijmans Johannes G. (Menlo Park CA), Process for removing condensable components from gas streams.
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Wijmans Johannes G. (Menlo Park CA), Process for removing condensable components from gas streams.
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Watler Kenneth G. (Houston TX), Process for separating higher hydrocarbons from natural or produced gas streams.
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Agrawal Rakesh (Allentown PA) Auvil Steven R. (Macungie PA), Process for the generation of gaseous and/or liquid nitrogen.
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O\Brien John V. (Shrewsbury MA) Holmes Arthur S. (LaCrosse WI) Hopewell Richard B. (Medfield MA), Process for the separation of landfill gas.
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Schendel Ronald L. (Hermosa Beach CA) Selleck Frederic T. (Whittier CA), Process of separating acid gases from hydrocarbons.
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Frg Wolfgang (Icking DEX) Stockman Rudolf (Buchloe DEX), Process to recover liquid methane.
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Duckett Melvyn (Stockport GBX) Limb David I. (Stockport GBX), Recovery of carbon dioxide from gas mixture.
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Dembicki Dennis R. (Fort Saskatchewan CA CAX) Coan Frederick L. (Pittsburg CA) Glassford Craig L. (Sarnia CA CAX) Overman Dana C. (Pleasant Hill CA), Use of membranes for ethylene recovery in polymerization processes.
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이 특허를 인용한 특허 (5)

Baker, Richard W.; Lokhandwala, Kaaeid A.; Wijmans, Johannes G.; Da Costa, Andre R., Nitrogen removal from natural gas using two types of membranes.
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John J. Senetar ; Lawrence W. Miller ; Linda Shi Cheng ; Mark M. Davis, Process for producing ethylene.
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Senetar John J. ; Miller Lawrence W. ; Cheng Linda Shi ; Davis Mark M., Process for producing ethylene.
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Landrum,J. Mark; Russell,Branch J.; Agee,Kenneth; LeViness,Stephen, Process to remove nitrogen and/or carbon dioxide from methane-containing streams.
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Ransbarger, Weldon L.; Mock, Jon M., System for enhanced fuel gas composition control in an LNG facility.
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연합인증

Ethylene/nitrogen separation process 원문보기

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Ethylene/nitrogen separation process 원문보기

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이 특허에 인용된 특허 (36)

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