GB1435151A - Asymmetric polyimide membranes - Google Patents

Asymmetric polyimide membranes

Info

Publication number
GB1435151A
GB1435151A GB3439773A GB3439773A GB1435151A GB 1435151 A GB1435151 A GB 1435151A GB 3439773 A GB3439773 A GB 3439773A GB 3439773 A GB3439773 A GB 3439773A GB 1435151 A GB1435151 A GB 1435151A
Authority
GB
United Kingdom
Prior art keywords
solvent
polyamic acid
tertiary amine
membranes
miscible
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB3439773A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1435151A publication Critical patent/GB1435151A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01D71/62—Polycondensates having nitrogen-containing heterocyclic rings in the main chain
    • B01D71/64—Polyimides; Polyamide-imides; Polyester-imides; Polyamide acids or similar polyimide precursors

Abstract

1435151 Polyimide membranes E I DU PONT DE NEMOURS & CO 19 July 1973 [20 July 1972] 34397/73 Heading B5B [Also in Divisions B1 and C3] Microporous polyimide membranes, asymmetric in that they are composed of a thin relatively dense barrier layer on at least one surface and a less dense layer, are obtained from an aromatic polyamic acid solution. The solution in solvent A is formed into a membrane which is contacted with a cyclizing composition comprising a C 1 -C 6 aliphatic carboxylic anhydride and a tertiary amine with or without a solvent B. If the tertiary amine is a solvent for the polyamic acid then a solvent B which is miscible with A and a non-solvent for the polyamic acid is used. When the tertiary amine is a non-solvent for the polyamic acid then solvent B whether miscible with A or not or capable of dissolving the polyamic acid or not, need not be used. In the latter case the tertiary amine must be miscible with solvent A. The polyimides have the following formula and, depending on the choice of R and R<SP>1</SP>, they may be soluble in a common organic solvent or not. For insoluble membranes R is selected from the group comprising and E<SP>1</SP> from phenylene, tolylene, naphthylene, biphenylene, anthrylene, pyridinediyl and in which R<SP>7</SP> is oxygen sulphur or methylene. Other radicals disclosed for R are and where R<SP>2</SP> is C 1 -C 3 alkylene or haloalkylene, oxygen, sulphur, -SO 2 -, in which R<SP>3</SP> and R<SP>4</SP> are C 1 -C 6 alkyl or phenyl, and for R<SP>1</SP> where R<SP>2</SP> is as defined above. The membranes may be washed, for example in benzene followed by ethanol and then by water, and then air-or vacuum-dried. Example 86 illustrates the preparation of the membrane in the form of a porous fibre by extruding the polymeric acid into a bath of the cyclizing agent.
GB3439773A 1972-07-20 1973-07-19 Asymmetric polyimide membranes Expired GB1435151A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27380572A 1972-07-20 1972-07-20

Publications (1)

Publication Number Publication Date
GB1435151A true GB1435151A (en) 1976-05-12

Family

ID=23045480

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3439773A Expired GB1435151A (en) 1972-07-20 1973-07-19 Asymmetric polyimide membranes

Country Status (4)

Country Link
JP (1) JPS5825690B2 (en)
DE (1) DE2337121C3 (en)
FR (1) FR2329702A1 (en)
GB (1) GB1435151A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4331705A (en) 1979-05-11 1982-05-25 Minnesota Mining And Manufacturing Company Curing of polyamic acids or salts thereof by ultraviolet exposure
US4571444A (en) * 1984-04-27 1986-02-18 Exxon Research And Engineering Co. Process for separating alkylaromatics from aromatic solvents and the separation of the alkylaromatic isomers using membranes
US4606903A (en) * 1984-04-27 1986-08-19 Exxon Research And Engineering Co. Membrane separation of uncoverted carbon fiber precursors from flux solvent and/or anti-solvent
US4717393A (en) * 1986-10-27 1988-01-05 E. I. Du Pont De Nemours And Company Polyimide gas separation membranes
US4717394A (en) * 1986-10-27 1988-01-05 E. I. Du Pont De Nemours And Company Polyimide gas separation membranes
US4981497A (en) * 1989-06-01 1991-01-01 E. I. Du Pont De Nemours And Company Amine-modified polyimide membranes
EP0410793A1 (en) * 1989-07-27 1991-01-30 Hoechst Celanese Corporation Method of gas separation and membranes therefor
WO2005032702A1 (en) * 2003-10-06 2005-04-14 L'air Liquide - Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Clause Method for separating hydrocarbon-containing gas mixtures using hydrocarbon-resistant membranes
US8210361B2 (en) 2006-09-19 2012-07-03 Polotskaya Galina A Thermally, heat and chemically resistant ultrafiltration polyimide membrane and method for its production

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5494477A (en) * 1978-01-10 1979-07-26 Nitto Electric Ind Co Ltd Manufacture of selective permeable membrnae
JPS5715819A (en) * 1980-07-01 1982-01-27 Ube Ind Ltd Gas separating material
JPS57170936A (en) * 1981-04-14 1982-10-21 Ube Ind Ltd Preparation of porous polyimide film
JPS57209608A (en) * 1981-06-22 1982-12-23 Ube Ind Ltd Preparation of composite polyimide separation film
JPS57209607A (en) * 1981-06-22 1982-12-23 Ube Ind Ltd Preparation of polyimide separation film
JPS588514A (en) * 1981-07-08 1983-01-18 Ube Ind Ltd Preparation of composite separation film
GB2104411B (en) * 1981-07-08 1985-02-20 Ube Industries Aromatic polyimide composite separating membrane
JPS5811003A (en) * 1981-07-10 1983-01-21 Ube Ind Ltd Polyimide type gas separating membrane
JPS59115738A (en) * 1982-12-21 1984-07-04 Sumitomo Electric Ind Ltd Selective gas-permeable membrane and its manufacture
US4532041A (en) * 1983-05-13 1985-07-30 Exxon Research And Engineering Co. Asymmetric polyimide reverse osmosis membrane, method for preparation of same and use thereof for organic liquid separations
JPS59230604A (en) * 1983-05-13 1984-12-25 エクソン・リサ−チ・アンド・エンジニアリング・カンパニ− Crossed polyimide reverse osmosis membrane, manufacture thereof and use thereof for separating organic liquid
JPS60181128A (en) * 1984-02-29 1985-09-14 Sumitomo Bakelite Co Ltd Heat-resistant resin composition
JPS6123485U (en) * 1984-07-18 1986-02-12 東京部品工業株式会社 Gear pump with metering circuit
JPS62200186U (en) * 1986-06-10 1987-12-19
US4978737A (en) * 1988-07-12 1990-12-18 Hoechst Celanese Corp. Copolyimides derived from 2,2-bis (amino phenyl) hexofluoropropane
JP2835052B2 (en) * 1988-08-05 1998-12-14 鐘淵化学工業株式会社 Modified polyimide copolymer and polyamic acid copolymer
JPH0253827A (en) * 1988-08-17 1990-02-22 Kanegafuchi Chem Ind Co Ltd Polyimide copolymer
CN112521937B (en) * 2020-12-10 2022-07-19 四川师范大学 Preparation and application of rare earth fluorescent composite material for uric acid detection

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3310506A (en) * 1963-03-18 1967-03-21 Du Pont Cellular polyimide product

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4331705A (en) 1979-05-11 1982-05-25 Minnesota Mining And Manufacturing Company Curing of polyamic acids or salts thereof by ultraviolet exposure
US4571444A (en) * 1984-04-27 1986-02-18 Exxon Research And Engineering Co. Process for separating alkylaromatics from aromatic solvents and the separation of the alkylaromatic isomers using membranes
US4606903A (en) * 1984-04-27 1986-08-19 Exxon Research And Engineering Co. Membrane separation of uncoverted carbon fiber precursors from flux solvent and/or anti-solvent
US4717393A (en) * 1986-10-27 1988-01-05 E. I. Du Pont De Nemours And Company Polyimide gas separation membranes
US4717394A (en) * 1986-10-27 1988-01-05 E. I. Du Pont De Nemours And Company Polyimide gas separation membranes
US4981497A (en) * 1989-06-01 1991-01-01 E. I. Du Pont De Nemours And Company Amine-modified polyimide membranes
EP0410793A1 (en) * 1989-07-27 1991-01-30 Hoechst Celanese Corporation Method of gas separation and membranes therefor
US7025804B2 (en) 2002-12-02 2006-04-11 L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude Method for separating hydrocarbon-containing gas mixtures using hydrocarbon-resistant membranes
WO2005032702A1 (en) * 2003-10-06 2005-04-14 L'air Liquide - Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Clause Method for separating hydrocarbon-containing gas mixtures using hydrocarbon-resistant membranes
US8210361B2 (en) 2006-09-19 2012-07-03 Polotskaya Galina A Thermally, heat and chemically resistant ultrafiltration polyimide membrane and method for its production

Also Published As

Publication number Publication date
DE2337121B2 (en) 1981-05-07
JPS5825690B2 (en) 1983-05-28
DE2337121A1 (en) 1974-02-07
DE2337121C3 (en) 1982-03-18
JPS4945152A (en) 1974-04-30
FR2329702A1 (en) 1977-05-27
FR2329702B1 (en) 1978-04-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920719