GB2011828B - Semipermeable membranes - Google Patents

Semipermeable membranes

Info

Publication number
GB2011828B
GB2011828B GB7850090A GB7850090A GB2011828B GB 2011828 B GB2011828 B GB 2011828B GB 7850090 A GB7850090 A GB 7850090A GB 7850090 A GB7850090 A GB 7850090A GB 2011828 B GB2011828 B GB 2011828B
Authority
GB
United Kingdom
Prior art keywords
semipermeable membranes
acrylonitrile
membrane
thickness
surface layer
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
GB7850090A
Other versions
GB2011828A (en
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.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical 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
Priority claimed from JP15937777A external-priority patent/JPS5490081A/en
Priority claimed from JP541978A external-priority patent/JPS5499083A/en
Application filed by Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Publication of GB2011828A publication Critical patent/GB2011828A/en
Application granted granted Critical
Publication of GB2011828B publication Critical patent/GB2011828B/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
    • B01D71/40—Polymers of unsaturated acids or derivatives thereof, e.g. salts, amides, imides, nitriles, anhydrides, esters
    • B01D71/42—Polymers of nitriles, e.g. polyacrylonitrile
    • B01D71/421—Polyacrylonitrile
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12—Chemical modification
    • C08J7/14—Chemical modification with acids, their salts or anhydrides
    • 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
    • B01D71/40—Polymers of unsaturated acids or derivatives thereof, e.g. salts, amides, imides, nitriles, anhydrides, esters
    • B01D71/42—Polymers of nitriles, e.g. polyacrylonitrile
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/20—Manufacture of shaped structures of ion-exchange resins
    • C08J5/22—Films, membranes or diaphragms
    • C08J5/2206—Films, membranes or diaphragms based on organic and/or inorganic macromolecular compounds
    • C08J5/2218—Synthetic macromolecular compounds
    • C08J5/2231—Synthetic macromolecular compounds based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds
    • C08J5/2243—Synthetic macromolecular compounds based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds obtained by introduction of active groups capable of ion-exchange into compounds of the type C08J5/2231
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/20—Manufacture of shaped structures of ion-exchange resins
    • C08J5/22—Films, membranes or diaphragms
    • C08J5/2287—After-treatment
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/51—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof
    • D06M11/55—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with sulfur, selenium, tellurium, polonium or compounds thereof with sulfur trioxide; with sulfuric acid or thiosulfuric acid or their salts
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/18—Homopolymers or copolymers of nitriles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/18—Homopolymers or copolymers of nitriles
    • C08J2333/20—Homopolymers or copolymers of acrylonitrile

Abstract

A method for the preparation of semipermeable membranes comprises sulphonating porous membranes of acrylonitrile polymers containing 40 to 100 mole percent of acrylonitrile. A heterogeneous membrane which can be prepared by such a method comprises an acrylonitrile polymer membrane which has a dense surface layer of less than 1 mu in thickness and has pores increasing in size gradually away from the said dense surface layer of the membrane and is cross-linked more than 0.1 mu in thickness from the surface. The semipermeable membranes are useful e.g. for separating substances by reverse osmosis or ultrafiltration.
GB7850090A 1977-12-28 1978-12-28 Semipermeable membranes Expired GB2011828B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP15937777A JPS5490081A (en) 1977-12-28 1977-12-28 Method of producing semipermeable membrane
JP541978A JPS5499083A (en) 1978-01-21 1978-01-21 Production of semipermeable membrane

Publications (2)

Publication Number Publication Date
GB2011828A GB2011828A (en) 1979-07-18
GB2011828B true GB2011828B (en) 1982-04-28

Family

ID=26339359

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7850090A Expired GB2011828B (en) 1977-12-28 1978-12-28 Semipermeable membranes

Country Status (6)

Country Link
DE (1) DE2856136A1 (en)
DK (1) DK582378A (en)
FR (1) FR2413108A1 (en)
GB (1) GB2011828B (en)
IT (1) IT1111100B (en)
NL (1) NL7812340A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5657836A (en) * 1979-10-16 1981-05-20 Asahi Chem Ind Co Ltd Porous hydrophilic polyolefin resin membrane and its preparation
WO1987006276A1 (en) * 1986-04-14 1987-10-22 Toray Industries, Inc. Sulfurized acrylic fibers with high strength and high toughness, process for their preparation, and composite material comprising them
US4965322A (en) * 1987-04-06 1990-10-23 Asahi Kasei Kogyo Kabushiki Kaisha Photosensitive and heat-sensitive polymers, process for producing the same and process for recording information using the same
DE10343901A1 (en) * 2003-09-19 2005-04-14 Basf Ag Amide group-containing ethylene terpolymers and their use

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1001669B (en) * 1953-07-11 1957-01-31 Permutit Ag Process for the production of selectively cation-permeable exchange membranes
GB973971A (en) * 1960-02-18
GB895082A (en) * 1960-03-12 1962-05-02 Membranfilter Ges G M B H Improvements in or relating to the production of membrane filters
GB916087A (en) * 1960-08-10 1963-01-16 Permutit Co Ltd Improvements relating to the production of ion-selective membranes
US3253880A (en) * 1961-10-09 1966-05-31 Chemstrand Corp Sulfonation of acrylonitrile polymers with sulfur trioxide to increase dye receptivity
US3320218A (en) * 1963-04-05 1967-05-16 Dow Chemical Co Cross-linked sulfonated aliphatic hydrocarbon polymers
US3740258A (en) * 1968-01-10 1973-06-19 Dow Chemical Co Resinous enclosure members rendered impermeable by sulfonation
US3925332A (en) * 1974-06-18 1975-12-09 Asahi Dow Ltd Hydrophilic membrane and process for the preparation thereof
DE2450670A1 (en) * 1974-10-25 1976-04-29 Benckiser Gmbh Joh A PROCESS FOR SEPARATION OF CITRATE OR CITRIC ACID FROM FERMENTATION SOLUTIONS
JPS5226380A (en) * 1975-08-25 1977-02-26 Sumitomo Chem Co Ltd Method of making semipermeable membranes

Also Published As

Publication number Publication date
FR2413108A1 (en) 1979-07-27
IT1111100B (en) 1986-01-13
IT7852456A0 (en) 1978-12-27
GB2011828A (en) 1979-07-18
DK582378A (en) 1979-06-29
NL7812340A (en) 1979-07-02
DE2856136A1 (en) 1979-07-12

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee