DK430089D0 - Graensefladesyntetiseret membran til omvendt osmose og fremgangsmaade til fremstilling af en saadan membran - Google Patents

Graensefladesyntetiseret membran til omvendt osmose og fremgangsmaade til fremstilling af en saadan membran

Info

Publication number
DK430089D0
DK430089D0 DK430089A DK430089A DK430089D0 DK 430089 D0 DK430089 D0 DK 430089D0 DK 430089 A DK430089 A DK 430089A DK 430089 A DK430089 A DK 430089A DK 430089 D0 DK430089 D0 DK 430089D0
Authority
DK
Denmark
Prior art keywords
membrane
synthetized
procedure
interface
making
Prior art date
Application number
DK430089A
Other languages
English (en)
Other versions
DK169097B1 (da
DK430089A (da
Inventor
John E Tomaschke
Original Assignee
Hydranautics
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hydranautics filed Critical Hydranautics
Publication of DK430089D0 publication Critical patent/DK430089D0/da
Publication of DK430089A publication Critical patent/DK430089A/da
Application granted granted Critical
Publication of DK169097B1 publication Critical patent/DK169097B1/da

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/12—Composite membranes; Ultra-thin membranes
    • B01D69/125—In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction
    • B01D69/1251—In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction by interfacial polymerisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/58—Other polymers having nitrogen in the main chain, with or without oxygen or carbon only
    • B01D71/60—Polyamines

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
DK430089A 1988-09-28 1989-08-31 Fremgangsmåde til fremstilling af grænsefladesyntetiseret membran til omvendt osmose DK169097B1 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/250,190 US4872984A (en) 1988-09-28 1988-09-28 Interfacially synthesized reverse osmosis membrane containing an amine salt and processes for preparing the same
US25019088 1988-09-28

Publications (3)

Publication Number Publication Date
DK430089D0 true DK430089D0 (da) 1989-08-31
DK430089A DK430089A (da) 1990-03-29
DK169097B1 DK169097B1 (da) 1994-08-15

Family

ID=22946674

Family Applications (1)

Application Number Title Priority Date Filing Date
DK430089A DK169097B1 (da) 1988-09-28 1989-08-31 Fremgangsmåde til fremstilling af grænsefladesyntetiseret membran til omvendt osmose

Country Status (8)

Country Link
US (1) US4872984A (da)
EP (1) EP0361092B1 (da)
JP (1) JPH0673617B2 (da)
KR (1) KR0142678B1 (da)
AU (1) AU613781B2 (da)
CA (1) CA1338335C (da)
DE (1) DE68910067T2 (da)
DK (1) DK169097B1 (da)

Families Citing this family (118)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4948507A (en) * 1988-09-28 1990-08-14 Hydranautics Corporation Interfacially synthesized reverse osmosis membrane containing an amine salt and processes for preparing the same
US5015380A (en) * 1989-04-20 1991-05-14 E. I. Du Pont De Nemours And Company Microporous support layer with interfacially polymerized copolyamide membrane thereon
JP3031763B2 (ja) * 1990-09-14 2000-04-10 日東電工株式会社 複合逆浸透膜およびその製造方法
US5254261A (en) * 1991-08-12 1993-10-19 Hydranautics Interfacially synthesized reverse osmosis membranes and processes for preparing the same
US5158683A (en) * 1991-09-03 1992-10-27 Ethyl Corporation Bromide separation and concentration using semipermeable membranes
US5246587A (en) * 1991-12-23 1993-09-21 Hydranautics Interfacially synthesized reverse osmosis membranes and processes for preparing the same
CA2087421A1 (en) * 1992-01-22 1993-07-23 Hisao Hachisuka Composite reverse osmosis membrane and novel acid chloride
US5234598A (en) * 1992-05-13 1993-08-10 Allied-Signal Inc. Thin-film composite membrane
ES2050606B1 (es) * 1992-09-02 1994-12-01 Toray Industries Un procedimiento para la produccion de una membrana semipermeable.
JP3006976B2 (ja) * 1993-06-24 2000-02-07 日東電工株式会社 高透過性複合逆浸透膜の製造方法
JPH07178327A (ja) * 1993-11-12 1995-07-18 Nitto Denko Corp 複合半透膜及びその製造方法
US5693227A (en) * 1994-11-17 1997-12-02 Ionics, Incorporated Catalyst mediated method of interfacial polymerization on a microporous support, and polymers, fibers, films and membranes made by such method
US5614099A (en) * 1994-12-22 1997-03-25 Nitto Denko Corporation Highly permeable composite reverse osmosis membrane, method of producing the same, and method of using the same
JP3489922B2 (ja) 1994-12-22 2004-01-26 日東電工株式会社 高透過性複合逆浸透膜の製造方法
US5989426A (en) * 1995-07-05 1999-11-23 Nitto Denko Corp. Osmosis membrane
US6171497B1 (en) 1996-01-24 2001-01-09 Nitto Denko Corporation Highly permeable composite reverse osmosis membrane
CN1213985A (zh) 1996-03-18 1999-04-14 日东电工株式会社 反渗透复合膜以及用它进行反渗透处理水的方法
JP3681214B2 (ja) * 1996-03-21 2005-08-10 日東電工株式会社 高透過性複合逆浸透膜
US5658460A (en) * 1996-05-07 1997-08-19 The Dow Chemical Company Use of inorganic ammonium cation salts to maintain the flux and salt rejection characteristics of reverse osmosis and nanofiltration membranes during drying
US6026968A (en) * 1996-05-13 2000-02-22 Nitto Denko Corporation Reverse osmosis composite membrane
US6413425B1 (en) 1997-04-10 2002-07-02 Nitto Denko Corporation Reverse osmosis composite membrane and reverse osmosis treatment method for water using the same
KR100618550B1 (ko) * 1997-07-02 2006-08-31 닛토덴코 가부시키가이샤 복합 역침투막 및 그 제조방법
KR100506537B1 (ko) * 1997-08-28 2005-11-08 주식회사 새 한 가교 폴리아미드계 역삼투 분리막의 제조방법
US5922203A (en) * 1997-10-07 1999-07-13 Hydranautics Amine monomers and their use in preparing interfacially synthesized membranes for reverse osmosis and nanofiltration
US6015495A (en) * 1998-02-18 2000-01-18 Saehan Industries Incorporation Composite polyamide reverse osmosis membrane and method of producing the same
US6063278A (en) * 1998-04-28 2000-05-16 Saehan Industries Inc. Composite polyamide reverse osmosis membrane and method of producing the same
US6162358A (en) * 1998-06-05 2000-12-19 Nl Chemicals Technologies, Inc. High flux reverse osmosis membrane
US6368507B1 (en) 1998-10-14 2002-04-09 Saekan Industries Incorporation Composite polyamide reverse osmosis membrane and method of producing the same
KR100477589B1 (ko) * 1998-11-09 2005-07-08 주식회사 새 한 폴리아미드 역삼투 복합막의 제조방법
KR20000051527A (ko) * 1999-01-22 2000-08-16 한형수 고유량 반투과 역삼투막의 제조방법
US6245234B1 (en) 1999-06-03 2001-06-12 Saehan Industries Incorporation Composite polyamide reverse osmosis membrane and method of producing the same
US6464873B1 (en) * 1999-06-15 2002-10-15 Hydranautics Interfacially polymerized, bipiperidine-polyamide membranes for reverse osmosis and/or nanofiltration and process for making the same
DE19934737C2 (de) * 1999-07-23 2001-11-29 Saehan Ind Inc Polyamid-Umkehrosmosemembran
DE19934734C2 (de) * 1999-07-23 2002-03-07 Saehan Ind Inc Polyamid-Umkehrosmosemembran
GB2352719B (en) * 1999-08-03 2003-05-28 Saehan Ind Inc Composite polyamide reverse osmosis membrane and method of producing the same
KR100506538B1 (ko) * 1999-08-17 2005-08-05 주식회사 새 한 폴리아마이드 역삼투 복합막 및 이의 제조방법
CN1114472C (zh) * 1999-12-28 2003-07-16 世韩工业株式会社 聚酰胺反渗透复合膜的制造方法
CN1110355C (zh) * 1999-12-28 2003-06-04 世韩工业株式会社 聚酰胺反渗透复合膜的制造方法
JP4289757B2 (ja) 2000-03-23 2009-07-01 日東電工株式会社 複合逆浸透膜の製造方法
US6837996B2 (en) * 2000-05-23 2005-01-04 Ge Osmonics, Inc. Polysulfonamide matrices
US6783711B2 (en) * 2000-05-23 2004-08-31 Ge Osmonics, Inc. Process for preparing a sulfonamide polymer matrix
RU2002134476A (ru) * 2000-05-23 2004-04-10 Осмоникс, Инк. (Us) Кислостойкие мембраны для нанофильтрации
EP1301559B1 (en) * 2000-05-23 2008-01-23 GE Osmonics, Inc. Modified sulfonamide polymers
US7001518B1 (en) 2000-11-28 2006-02-21 Hydranautics Low pressure reverse osmosis and nanofiltration membranes and method for the production thereof
KR100477591B1 (ko) * 2001-01-17 2005-03-18 주식회사 새 한 폴리아마이드 역삼투 복합막 및 그 제조방법
KR100477592B1 (ko) * 2001-02-07 2005-03-18 주식회사 새 한 폴리아마이드 역삼투 복합막 및 그 제조방법
US6805796B2 (en) 2001-02-13 2004-10-19 Nitto Denko Corporation Water treatment apparatus
US7081202B2 (en) 2001-03-19 2006-07-25 Nitto Denko Corporation Composite semipermeable membrane, production method thereof, and water treatment method using the same
EP2014350A3 (en) 2001-03-19 2009-07-22 Nitto Denko Corporation Water-treating method
JP2003088730A (ja) 2001-09-20 2003-03-25 Nitto Denko Corp 逆浸透膜エレメントの処理方法、および逆浸透膜モジュール
DE10228148B4 (de) * 2002-06-24 2006-08-24 Saehan Industries Inc. Selektive Membran mit hoher Fouling-Beständigkeit
JP4500002B2 (ja) 2003-05-06 2010-07-14 日東電工株式会社 複合半透膜及びその製造方法
US7279097B2 (en) 2003-06-18 2007-10-09 Toray Industries, Inc. Composite semipermeable membrane, and production process thereof
US7490725B2 (en) * 2003-10-09 2009-02-17 Membrane Technology & Research Reverse osmosis membrane and process
JP4484635B2 (ja) * 2004-09-02 2010-06-16 日東電工株式会社 スパイラル型逆浸透膜エレメント、およびその製造方法
JP4656502B2 (ja) * 2004-10-01 2011-03-23 日東電工株式会社 複合半透膜及びその製造方法
JP2006102594A (ja) * 2004-10-01 2006-04-20 Nitto Denko Corp 複合半透膜の製造方法
JP4656503B2 (ja) * 2004-10-01 2011-03-23 日東電工株式会社 複合半透膜及びその製造方法
JP4656511B2 (ja) * 2004-10-04 2011-03-23 日東電工株式会社 複合逆浸透膜の製造方法
KR20080003789A (ko) * 2005-03-09 2008-01-08 더 리전츠 오브 더 유니버시티 오브 캘리포니아 나노복합체막 및 이의 제조 및 사용 방법
US7479300B2 (en) * 2005-03-30 2009-01-20 Woongjin Chemical Co., Ltd. Composite polyamide reverse osmosis membrane and method of producing the same
KR100680109B1 (ko) * 2005-07-27 2007-02-07 웅진코웨이주식회사 폴리아미드 역삼투 복합막 및 그 제조방법
US7537697B2 (en) * 2006-02-01 2009-05-26 Woongjin Chemical Co., Ltd. Selective membrane having a high fouling resistance
US7913857B2 (en) * 2006-02-01 2011-03-29 Woongjin Chemical Co., Ltd. Selective membrane having a high fouling resistance
US20070227966A1 (en) 2006-03-31 2007-10-04 Koo Ja-Young Composite polyamide reverse osmosis membrane showing high boron rejection and method of producing the same
WO2007133362A1 (en) * 2006-05-12 2007-11-22 Dow Global Technologies Inc. Modified membrane
KR100905901B1 (ko) * 2006-09-07 2009-07-02 웅진코웨이주식회사 폴리아미드 역삼투 복합막 활성층 형성용 아민 수용액,이를 이용한 폴리아미드 역삼투 복합막, 및 이의 제조방법
JP2008093544A (ja) * 2006-10-10 2008-04-24 Nitto Denko Corp 複合半透膜及びその製造方法
JP4936438B2 (ja) * 2006-10-10 2012-05-23 日東電工株式会社 乾燥複合半透膜の製造方法
AU2007317516B2 (en) * 2006-10-27 2013-04-04 The Regents Of The University Of California Micro-and nanocomposite support structures for reverse osmosis thin film membranes
US8196754B2 (en) * 2007-01-17 2012-06-12 The Ohio States University Research Foundation Water permeable membranes and methods of making water permeable membranes
KR100868028B1 (ko) * 2007-02-23 2008-11-10 웅진케미칼 주식회사 내염소성 폴리아미드 복합막 및 그 제조방법
JP2008246419A (ja) * 2007-03-30 2008-10-16 Nitto Denko Corp 複合半透膜の製造方法
CA2700333A1 (en) * 2007-09-21 2009-03-26 The Regents Of The University Of California Nanocomposite membranes and methods of making and using same
DE102007060525A1 (de) * 2007-12-13 2009-06-18 Aksys Gmbh Schalldämpfungs-Luftführungskanal und Verfahren zur Herstellung eines Schalldämpfungs-Luftführungskanals
US20090188861A1 (en) * 2007-12-13 2009-07-30 Stc. Unm Preventing and cleaning fouling on reverse osmosis membranes
US8177978B2 (en) * 2008-04-15 2012-05-15 Nanoh20, Inc. Reverse osmosis membranes
KR20100003799A (ko) 2008-07-02 2010-01-12 웅진케미칼 주식회사 높은 안티파울링성을 가지는 선택적 분리막 및 그의제조방법
US8147735B2 (en) * 2008-07-09 2012-04-03 Eltron Research & Development, Inc. Semipermeable polymers and method for producing same
US9504966B2 (en) * 2008-09-26 2016-11-29 Nitto Denko Corporation Composite semi-permeable membrane and method for producing same
JP5925409B2 (ja) * 2008-10-23 2016-05-25 日東電工株式会社 熱硬化性樹脂多孔シートの製造方法、熱硬化性樹脂多孔シート、及びそれを用いた複合半透膜
US7815987B2 (en) * 2008-12-04 2010-10-19 Dow Global Technologies Inc. Polyamide membrane with coating of polyalkylene oxide and polyacrylamide compounds
JP5745512B2 (ja) 2009-06-29 2015-07-08 ナノエイチツーオー・インコーポレーテッド 窒素添加剤を含む改良された混成ｔｆｃｒｏ膜
JP5633517B2 (ja) * 2009-09-29 2014-12-03 栗田工業株式会社 透過膜の阻止率向上方法及び透過膜
CN102791365B (zh) * 2010-03-10 2014-12-24 陶氏环球技术有限责任公司 具有包含聚环氧烷和苯乙酮化合物的涂层的聚酰胺膜
WO2011136865A1 (en) 2010-04-26 2011-11-03 Dow Global Technologies Llc Polyamide membrane with a coating comprising polyalkylene oxide and triazine compounds
WO2011149571A1 (en) 2010-05-24 2011-12-01 Dow Global Technologies Llc Polyamide membrane with coating comprising polyalkylene oxide and biguanide compounds
US8646616B2 (en) 2010-05-24 2014-02-11 Dow Global Technologies Llc Composite membrane with coating comprising polyalkylene oxide and imidazol compounds
US8757396B2 (en) 2010-05-24 2014-06-24 Dow Global Technologies Llc Composite membrane with coating comprising polyalkylene oxide and oxy-substituted phenyl compounds
PL2615665T3 (pl) * 2010-09-06 2019-09-30 Lg Chem, Ltd. Separator, sposób jego wytwarzania i zawierające go urządzenie elektrochemiczne
JP5968328B2 (ja) 2010-11-10 2016-08-10 ナノエイチツーオー・インコーポレーテッド 非金属添加剤を含む改良された混成ｔｆｃｒｏ膜
JP2012121943A (ja) 2010-12-06 2012-06-28 Nitto Denko Corp エポキシ樹脂多孔シートの製造方法
EP2659956A4 (en) 2010-12-28 2017-04-12 Toray Industries, Inc. Composite semipermeable membrane
US8820540B2 (en) 2011-01-28 2014-09-02 Woongjin Chemical Co., Ltd. Method for preparing a filtration membrane and filtration membrane prepared by said method
KR101240956B1 (ko) 2011-02-18 2013-03-11 웅진케미칼 주식회사 내오염성능이 우수한 역삼투 복합막 및 그의 제조방법
WO2014014669A1 (en) 2012-07-19 2014-01-23 Dow Global Technologies Llc Composite polyamide membrane with improved structure
US9211507B2 (en) * 2012-11-21 2015-12-15 Lg Chem, Ltd. Water-treatment separating membrane of high flux having good chlorine resistance and method of manufacturing the same
WO2014109946A1 (en) 2013-01-14 2014-07-17 Dow Global Technologies Llc Composite polyamide membrane
US9895666B2 (en) 2013-01-14 2018-02-20 Dow Global Technologies Llc Composite polyamide membrane made using substituted benzamide monomer
US9289729B2 (en) 2013-03-16 2016-03-22 Dow Global Technologies Llc Composite polyamide membrane derived from carboxylic acid containing acyl halide monomer
WO2014179024A1 (en) * 2013-05-03 2014-11-06 Dow Global Technologies Llc Composite polyamide membrane derived from an aliphatic acyclic tertiary amine compound
JP6577468B2 (ja) 2013-12-02 2019-09-18 ダウ グローバル テクノロジーズ エルエルシー 亜硝酸で後処理される複合ポリアミド膜
CN106170333B (zh) 2013-12-02 2019-02-15 陶氏环球技术有限责任公司 用二羟基芳基化合物和亚硝酸处理的复合聚酰胺膜
JP6535010B2 (ja) 2014-01-09 2019-06-26 ダウ グローバル テクノロジーズ エルエルシー 好ましいアゾ含有量を有する複合ポリアミド皮膜
EP3092061B1 (en) 2014-01-09 2020-02-05 Dow Global Technologies LLC Composite polyamide membrane having high acid content and low azo content
US9981227B2 (en) 2014-01-09 2018-05-29 Dow Global Technologies Llc Composite polyamide membrane having azo content and high acid content
US9776141B2 (en) 2014-04-28 2017-10-03 Dow Global Technologies Llc Composite polyamide membrane post-treated with nitrous acid
KR102359211B1 (ko) 2014-05-14 2022-02-07 다우 글로벌 테크놀로지스 엘엘씨 아질산으로 후처리된 복합 폴리아미드 막
CN106385798B (zh) 2014-05-23 2019-10-11 朗盛德国有限责任公司 用于生产具有＜1000g/mol的平均分子量截留值的滤膜的方法
US9795928B2 (en) 2014-06-24 2017-10-24 Nano And Advanced Materials Institute Limited Stepwise interfacial polymerization technique with different reagent solution designs to prepare hollow fiber nanofiltration membrane composites
US9861940B2 (en) 2015-08-31 2018-01-09 Lg Baboh2O, Inc. Additives for salt rejection enhancement of a membrane
US9737859B2 (en) 2016-01-11 2017-08-22 Lg Nanoh2O, Inc. Process for improved water flux through a TFC membrane
US10155203B2 (en) 2016-03-03 2018-12-18 Lg Nanoh2O, Inc. Methods of enhancing water flux of a TFC membrane using oxidizing and reducing agents
KR102089123B1 (ko) * 2016-11-04 2020-03-13 주식회사 엘지화학 수처리 분리막의 제조방법 및 이에 의하여 제조된 수처리 분리막 및 수처리 분리막을 포함하는 수처리 모듈
CN108079806B (zh) 2018-02-07 2020-09-08 浙江大学 一种聚酰胺半透膜、制备方法及其应用
EP3778711A1 (en) * 2019-08-13 2021-02-17 Technische Universität Dresden Method for the synthesis of a two-dimensional or quasi-two-dimensional polymer film, the two-dimensional or quasi-two-dimensional polymer film and the use
KR20230116012A (ko) 2020-11-30 2023-08-03 멤스타 유에스에이 아이엔씨. 역삼투막 및 이의 제조방법
CN119488812A (zh) * 2023-08-18 2025-02-21 中国石油化工股份有限公司 荷正电耐酸复合膜及其制备方法与应用

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4259183A (en) * 1978-11-07 1981-03-31 Midwest Research Institute Reverse osmosis membrane
US4277344A (en) * 1979-02-22 1981-07-07 Filmtec Corporation Interfacially synthesized reverse osmosis membrane
EP0179474A3 (en) * 1984-10-24 1988-07-13 E.I. Du Pont De Nemours And Company Gas separation membrane and process for preparing it
US4761234A (en) * 1985-08-05 1988-08-02 Toray Industries, Inc. Interfacially synthesized reverse osmosis membrane
US4812238A (en) * 1987-01-15 1989-03-14 The Dow Chemical Company Membranes prepared via reaction of diazonium compounds or precursors
US4769148A (en) * 1987-11-18 1988-09-06 The Dow Chemical Company Novel polyamide reverse osmosis membranes

Also Published As

Publication number Publication date
CA1338335C (en) 1996-05-21
EP0361092B1 (en) 1993-10-20
KR0142678B1 (ko) 1998-07-15
EP0361092A3 (en) 1991-07-24
DK169097B1 (da) 1994-08-15
DE68910067D1 (de) 1993-11-25
KR900004811A (ko) 1990-04-13
DK430089A (da) 1990-03-29
JPH02187135A (ja) 1990-07-23
AU3948389A (en) 1990-04-05
AU613781B2 (en) 1991-08-08
US4872984A (en) 1989-10-10
EP0361092A2 (en) 1990-04-04
DE68910067T2 (de) 1994-02-10
JPH0673617B2 (ja) 1994-09-21

Similar Documents

Publication Publication Date Title
DK430089A (da) Graensefladesyntetiseret membran til omvendt osmose og fremgangsmaade til fremstilling af en saadan membran
BR8800185A (pt) Membranas de osmose reversa
DK185587D0 (da) Mikroporoes ultrafiltreringsmembran
NO893202L (no) Framgangsmaate og anordning for digital talekoding.
DK529587D0 (da) Keramisk membran til filtrering og fremgangsmaade til fremstilling deraf
DK0787525T3 (da) Højpermeabel sammensat membran til omvendt osmose
NO912058L (no) Bioforlikelige membraner, deres fremstilling og anvendelse
DE69132403D1 (de) Zusammengesetzte membran
IT1163409B (it) Filtro a membrana per microfiltrazione e procedimento per la sua fabbricazione
DK419184A (da) Fremgangsmaade til indkapsling af et kernemateriale i en semipermeabel membran
DK0401964T3 (da) Behandling af membraner til omvendt osmose
NO875032L (no) Polytrialkylgermylpropynpolymerer og membraner.
DK0601301T3 (da) Membranelementer til omvendt osmose
NO151529C (no) Anordning for ultrafiltrering og omvendt osmose
DK383289A (da) Membraner paa basis af blandinger af polybenzimidazoler og polyarylater
DE68927623D1 (de) Folienschalter
DK441386D0 (da) Understoettet membran og fremgangsmaade til fremstilling deraf
FI903652A7 (fi) Mikrohuokoinen kalvo
DE69005198D1 (de) Selektivdurchlässige Membran.
DK193787D0 (da) Sammensat membran
NO953222L (no) Ioneselektiv keramisk membran
DK153985A (da) Membran til omvendt osmose samt stoebeoploesning og fremgangsmaade til dens fremstilling
DK436485A (da) Membraner til omvendt osmose samt fremgangsmaade til fremstilling deraf
BE886192A (fr) Element a membranes pour osmose inverse enroulees en spirale
DK614086A (da) Sammensat semipermeabel membran og fremstilling deraf

Legal Events

Date Code Title Description
B1 Patent granted (law 1993)
PBP Patent lapsed

Country of ref document: DK