JPS5566935A - Production of porous vinylidene fluoride resin membrane - Google Patents

Production of porous vinylidene fluoride resin membrane

Info

Publication number
JPS5566935A
JPS5566935A JP13935778A JP13935778A JPS5566935A JP S5566935 A JPS5566935 A JP S5566935A JP 13935778 A JP13935778 A JP 13935778A JP 13935778 A JP13935778 A JP 13935778A JP S5566935 A JPS5566935 A JP S5566935A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
solvent
vinylidene
fluoride
surfactant
resin
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.)
Pending
Application number
JP13935778A
Other versions
JPS6138207B2 (en )
Inventor
Takashi Nomi
Takao Yamada
Original Assignee
Asahi Chem Ind 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
    • B01D71/00Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06Organic material
    • B01D71/30Polyalkenyl halides
    • B01D71/32Polyalkenyl halides containing fluorine atoms
    • B01D71/34Polyvinylidene fluoride

Abstract

PURPOSE: To obtain a porous membrane, usable for separation technologies, e.g. desalination of brine, having improved selective permeability, by immersing a cast film comprising a vinylidene fluoride resin, a solvent, and a surfactant, in a non- aqueous solvent to remove the solvent and surfactant.
CONSTITUTION: (A) A cast film comprising (a) a vinylidene fluoride resin, e.g. vinylidene fluroide homopolymer or vinylidene fluoride-tetrafluoroethylene copolymer, (b) its solvent, e.g. dimethylformamide, and (c) a surfactant is immersed in (B) a non-solvent of the resin, e.g. water or methanol, to give to porous vinylidene fluoride film free from (b) and (c). Any type of surfactant, e.g. the nonionic type, preferably soluble in the solvent of polyvinylidene fluoride, and stable at high temperatures, may be used as (c).
COPYRIGHT: (C)1980,JPO&Japio
JP13935778A 1978-11-14 1978-11-14 Expired JPS6138207B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13935778A JPS6138207B2 (en) 1978-11-14 1978-11-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13935778A JPS6138207B2 (en) 1978-11-14 1978-11-14

Publications (2)

Publication Number Publication Date
JPS5566935A true true JPS5566935A (en) 1980-05-20
JPS6138207B2 JPS6138207B2 (en) 1986-08-28

Family

ID=15243437

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13935778A Expired JPS6138207B2 (en) 1978-11-14 1978-11-14

Country Status (1)

Country Link
JP (1) JPS6138207B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56152851A (en) * 1980-03-28 1981-11-26 Pennwalt Corp Porous vinylidene fluoride polymer membrane and manufacture thereof
JPS5891732A (en) * 1981-11-27 1983-05-31 Teijin Ltd Porous polyvinylidene fluoride resin membrane and preparation thereof
JPS5898105A (en) * 1981-12-07 1983-06-10 Toray Ind Inc Fluoride type wet separation membrane and preparation thereof
JPS58163489A (en) * 1982-03-24 1983-09-28 Asahi Chem Ind Co Ltd Removal of suspended fine particle from aqueous liquid contg. acid, alkali or/and oxidizing agent
JPS6097001A (en) * 1983-11-02 1985-05-30 Teijin Ltd Polyvinylidene fluoride porous membrane and its preparation
US4707266A (en) * 1982-02-05 1987-11-17 Pall Corporation Polyamide membrane with controlled surface properties

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56152851A (en) * 1980-03-28 1981-11-26 Pennwalt Corp Porous vinylidene fluoride polymer membrane and manufacture thereof
JPS5891732A (en) * 1981-11-27 1983-05-31 Teijin Ltd Porous polyvinylidene fluoride resin membrane and preparation thereof
JPS5898105A (en) * 1981-12-07 1983-06-10 Toray Ind Inc Fluoride type wet separation membrane and preparation thereof
JPH0420649B2 (en) * 1981-12-07 1992-04-06 Toray Industries
US4707266A (en) * 1982-02-05 1987-11-17 Pall Corporation Polyamide membrane with controlled surface properties
JPS58163489A (en) * 1982-03-24 1983-09-28 Asahi Chem Ind Co Ltd Removal of suspended fine particle from aqueous liquid contg. acid, alkali or/and oxidizing agent
JPS6097001A (en) * 1983-11-02 1985-05-30 Teijin Ltd Polyvinylidene fluoride porous membrane and its preparation

Also Published As

Publication number Publication date Type
JPS6138207B2 (en) 1986-08-28 grant
JP1368847C (en) grant

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