GB1503270A - Separation membranes - Google Patents

Separation membranes

Info

Publication number
GB1503270A
GB1503270A GB2394476A GB2394476A GB1503270A GB 1503270 A GB1503270 A GB 1503270A GB 2394476 A GB2394476 A GB 2394476A GB 2394476 A GB2394476 A GB 2394476A GB 1503270 A GB1503270 A GB 1503270A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
membrane
alcohol
copolymer
mixture
separation
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
GB2394476A
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.)
Kuraray Co Ltd
Original Assignee
Kuraray Co Ltd
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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D67/00Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0081After-treatment of organic or inorganic membranes
    • B01D67/0095Drying
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D67/00Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0002Organic membrane formation
    • B01D67/0009Organic membrane formation by phase separation, sol-gel transition, evaporation or solvent quenching
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D67/00Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0002Organic membrane formation
    • B01D67/0009Organic membrane formation by phase separation, sol-gel transition, evaporation or solvent quenching
    • B01D67/0013Casting processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D67/00Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0002Organic membrane formation
    • B01D67/0009Organic membrane formation by phase separation, sol-gel transition, evaporation or solvent quenching
    • B01D67/0016Coagulation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D69/00Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/02Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D71/00Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06Organic material
    • B01D71/38Polyalkenylalcohols; Polyalkenylesters; Polyalkenylethers; Polyalkenylaldehydes; Polyalkenylketones; Polyalkenylacetals; Polyalkenylketals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2323/00Details relating to membrane preparation
    • B01D2323/12Specific ratios of components used
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2325/00Details relating to properties of membranes
    • B01D2325/20Specific permeability or cut-off range

Abstract

1503270 Separation membrane KURARAY CO Ltd 9 June 1976 [10 June 1975 3 Feb 1976] 23944/76 Heading B5B The membrane is formed from a copolymer of ethylene and vinyl alcohol, the constituent particles of which have an average diameter of 100-10000 Angstrom units and are bonded together to form a membrane free from voids in excess of 2 microns in diameter. The micropore structure is uniform throughout its longitudinal and its transverse sectional areas. The membrane is formed by coagulating a solution of the copolymer in DMSO, DMA or a mixture thereof or a mixture containing a minor amount of another solvent under mild conditions corresponding to not less than 3 sees. of coagulation time. Water present in or on the membrane may be replaced by an organic watermiscible solvent, e.g. an aliphatic alcohol, ketone or polyhydric alcohol or a reaction product of a polyhydric alcohol and ethylene oxide, followed by drying below the glass transition point of the copolymer.
GB2394476A 1975-06-10 1976-06-09 Separation membranes Expired GB1503270A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP6987375A JPS51145474A (en) 1975-06-10 1975-06-10 A blood dialysis membrane with outstanding dialysis performance and a process for producing it
JP1097376A JPS5856379B2 (en) 1976-02-03 1976-02-03

Publications (1)

Publication Number Publication Date
GB1503270A true true GB1503270A (en) 1978-03-08

Family

ID=26346336

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2394476A Expired GB1503270A (en) 1975-06-10 1976-06-09 Separation membranes

Country Status (4)

Country Link
CA (1) CA1073822A (en)
DE (1) DE2625681C3 (en)
FR (1) FR2314215B1 (en)
GB (1) GB1503270A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4830796A (en) * 1986-06-20 1989-05-16 Eniricerche S.P.A. Process for preparing a polyester-amide hollow fiber membrane
US4879036A (en) * 1986-06-20 1989-11-07 Eniricerche, S.P.A. Asymmetrical membrane of polyester-amide and process for preparing it

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5753564Y2 (en) * 1977-06-01 1982-11-19
JPS5718924B2 (en) * 1977-09-06 1982-04-20
DE2935097C2 (en) * 1978-09-07 1990-04-12 Kuraray Co., Ltd., Kurashiki, Okayama, Jp
FR2441641B2 (en) * 1978-11-15 1985-04-26 Kuraray Co
JPS6214642B2 (en) * 1979-04-27 1987-04-03 Kuraray Co
JPS6227162B2 (en) * 1979-04-30 1987-06-12 Kuraray Co
JPH0513688B2 (en) * 1984-11-09 1993-02-23 Terumo Corp
DE3564078D1 (en) * 1984-11-09 1988-09-08 Terumo Corp Flat permeable membrane and method for manufacture thereof
DE3801528C2 (en) * 1988-01-20 1996-03-21 Zweckverband Sondermuellplaetz Membrane, process for their preparation and use of the diaphragm
US5480554A (en) * 1992-05-13 1996-01-02 Pall Corporation Integrity-testable wet-dry-reversible ultrafiltration membranes and method for testing same
US5788862A (en) * 1992-05-13 1998-08-04 Pall Corporation Filtration medium
JP3992438B2 (en) 1999-01-21 2007-10-17 株式会社荏原製作所 Ethylene - vinyl alcohol hollow fiber membrane

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1667357A1 (en) * 1967-08-18 1971-08-12 Siemens Ag A method for producing porous and hydrophilic diaphragms for electro-chemical cells, in particular diaphragms for fuel elements
DE1667358A1 (en) * 1968-02-08 1971-08-12 Siemens Ag A process for the preparation of homogeneous ion exchange membranes
JPS565255B2 (en) * 1973-03-02 1981-02-04

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4830796A (en) * 1986-06-20 1989-05-16 Eniricerche S.P.A. Process for preparing a polyester-amide hollow fiber membrane
US4879036A (en) * 1986-06-20 1989-11-07 Eniricerche, S.P.A. Asymmetrical membrane of polyester-amide and process for preparing it

Also Published As

Publication number Publication date Type
DE2625681C3 (en) 1986-05-28 grant
CA1073822A (en) 1980-03-18 grant
FR2314215B1 (en) 1979-04-06 grant
FR2314215A1 (en) 1977-01-07 application
DE2625681B2 (en) 1980-10-30 application
CA1073822A1 (en) grant
DE2625681A1 (en) 1977-03-17 application

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Legal Events

Date Code Title Description
PS Patent sealed
429A Application made for amendment of specification (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
429D Case decided by the comptroller ** specification amended (sect. 29/1949)
SP Amendment (slips) printed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930609