GB1238180A - - Google Patents

Info

Publication number
GB1238180A
GB1238180A GB1238180DA GB1238180A GB 1238180 A GB1238180 A GB 1238180A GB 1238180D A GB1238180D A GB 1238180DA GB 1238180 A GB1238180 A GB 1238180A
Authority
GB
United Kingdom
Prior art keywords
diluent
polymer
membrane
dmf
sept
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
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 filed Critical
Publication of GB1238180A publication Critical patent/GB1238180A/en
Expired legal-status Critical Current

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
    • B01D71/76Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74
    • 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 manufacture
    • B01D67/0009Organic membrane manufacture by phase separation, sol-gel transition, evaporation or solvent quenching
    • 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
    • B01D2325/00Details relating to properties of membranes
    • B01D2325/22Thermal or heat-resistance properties

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Laminated Bodies (AREA)

Abstract

1,238,180. Microporous membranes. AMICON CORP. 12 Sept., 1968 [21 Sept., 1967], No. 43335/68. Heading B5B. An integral, anisotropic, microporous membrane of a synthetic organic polymer which absorbs less than 10% water at 100% R.H. and 25‹ C. has a surface layer having a plurality of pores of diameter 1-1000 mÁ and preferably a thickness of 0À1-5À0 Á, and a support layer of sufficiently large pore structure that it provides no significant overall resistance to hydraulic flow through the membrane. The polymer may be 5-90% crystalline with a Tg of at least 20‹ C. The membrane is made by preferentially contacting one side of a cast film of an organic solution of the polymer with a diluent highly compatible with the organic solvent and sufficiently incompatible with the polymer to cause immediate precipitation thereof, and maintaining the membrane thus formed in contact with the diluent until substantially all of the solvent has been replaced by the diluent. Many polymers are listed; these are preferably polar. The following are exemplified; poly-(bisphenol A carbonate) in dimethylformamide (DMF), PVC in DMF*, a modacrylic polymer in DMF* and a polysulphone in N-methyl-2- pyrrolidone. The diluent is water. A " solution modifier " may be added, which alters the solvating effect of the diluent or organic solvent, e.g. ZnCl 2 is added to the solutions * above.
GB1238180D 1967-09-21 1968-09-12 Expired GB1238180A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US66964867A 1967-09-21 1967-09-21

Publications (1)

Publication Number Publication Date
GB1238180A true GB1238180A (en) 1971-07-07

Family

ID=24687156

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1238180D Expired GB1238180A (en) 1967-09-21 1968-09-12

Country Status (13)

Country Link
JP (1) JPS5022508B1 (en)
BE (1) BE721058A (en)
BR (1) BR6802466D0 (en)
CH (1) CH526978A (en)
DE (1) DE1794191B2 (en)
DK (1) DK145564C (en)
ES (1) ES358342A1 (en)
FI (1) FI50064C (en)
FR (1) FR1584659A (en)
GB (1) GB1238180A (en)
NL (1) NL161988B (en)
PL (1) PL88875B1 (en)
SE (1) SE369377B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2671628A4 (en) * 2011-01-31 2016-11-23 Toray Industries Separation membrane for water treatment and production method for same
CN112442749A (en) * 2019-08-27 2021-03-05 中国石油化工股份有限公司 Preparation method and application of fiber material
EP3639913A4 (en) * 2017-06-15 2021-04-14 Kaneka Corporation POROUS MEMBRANE FOR USE IN WATER TREATMENT

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1396091A (en) * 1971-02-18 1975-05-29 Babcock & Wilcox Ltd Semi-permeable membranes
JPS523343B2 (en) * 1972-04-28 1977-01-27
FR2265454A2 (en) * 1974-03-26 1975-10-24 Uhde Gmbh Friedrich Polyether-polycarbonate block copolymer films - esp for haemodialysis made by casting from soln
JPS5193786A (en) * 1975-02-15 1976-08-17 Makurokagatano chukuseni
NZ184767A (en) * 1976-08-05 1980-03-05 Tecneco Spa Assymetric membranes from fluorinated polymeric materials
US4087388A (en) * 1976-10-21 1978-05-02 E. I. Du Pont De Nemours And Company Process of preparing a permselective membrane
US4203847A (en) * 1977-05-25 1980-05-20 Millipore Corporation Making porous membranes and the membrane products
JPS5416378A (en) * 1977-07-08 1979-02-06 Asahi Chem Ind Co Ltd Polysulfone semipermeable membrane
JPS5827963B2 (en) * 1979-05-17 1983-06-13 日東電工株式会社 Method for manufacturing selectively permeable membrane
CA1202837A (en) * 1980-03-14 1986-04-08 Wolfgang J. Wrasidlo Asymmetric membranes and process therefor
US4774039A (en) * 1980-03-14 1988-09-27 Brunswick Corporation Dispersing casting of integral skinned highly asymmetric polymer membranes
DE3028213C2 (en) * 1980-07-25 1990-12-06 Akzo Gmbh, 5600 Wuppertal Process for the production of an ultrafiltration membrane made of polyamide and a membrane produced therefrom

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2671628A4 (en) * 2011-01-31 2016-11-23 Toray Industries Separation membrane for water treatment and production method for same
EP3639913A4 (en) * 2017-06-15 2021-04-14 Kaneka Corporation POROUS MEMBRANE FOR USE IN WATER TREATMENT
US11224844B2 (en) 2017-06-15 2022-01-18 Kaneka Corporation Porous membrane for water treatment use
CN112442749A (en) * 2019-08-27 2021-03-05 中国石油化工股份有限公司 Preparation method and application of fiber material
CN112442749B (en) * 2019-08-27 2023-04-11 中国石油化工股份有限公司 Preparation method and application of fiber material

Also Published As

Publication number Publication date
FR1584659A (en) 1969-12-26
SE369377B (en) 1974-08-26
DK145564C (en) 1983-05-16
NL6813415A (en) 1969-03-25
BE721058A (en) 1969-03-03
DE1794191B2 (en) 1974-04-25
NL161988B (en) 1979-11-15
ES358342A1 (en) 1970-06-01
DK145564B (en) 1982-12-13
BR6802466D0 (en) 1973-05-10
CH526978A (en) 1972-08-31
PL88875B1 (en) 1976-10-30
FI50064B (en) 1975-09-01
FI50064C (en) 1975-12-10
DE1794191A1 (en) 1971-03-18
JPS5022508B1 (en) 1975-07-31

Similar Documents

Publication Publication Date Title
GB1238180A (en)
US3556305A (en) Composite membrane and process for making same
GB1295585A (en)
FR2360623B1 (en)
GB1390418A (en) Reverse osmosis process using cross-linked aromatic polyamide membranes
ATE91433T1 (en) MEMBRANES.
NL134681C (en)
ES372085A1 (en) Semi-permeable membranes and their use
US4242159A (en) Process for the production of composite membranes
ES372255A1 (en) Semipermeable membranes
ES2027766T3 (en) REVERSE OSMOSIS MEMBRANES OF P-XYLIDENDIAMIDE / DIIMIDE COMPOSITE MATERIAL.
ES410178A1 (en) Reverse osmosis membranes
GB1432866A (en) Asymmetric polymer membranes of reduced elastic modulus
GB1279719A (en) Process for the preparation of a semipermeable membrane
GB1474594A (en) Immobilization of enzymes in ultrafiltration membrane
FR2286851A1 (en) Semi-permeable membranes of crosslinked, opt. substd. polyacrylamide - for sepn. of organic or inorganic cpds. from aqueous solns.
JPS5670805A (en) Preparation of selectively permeable membrane for treating organic liquid
FR2413108A1 (en) PROCESS FOR THE MANUFACTURE OF SEMI-PERMEABLE MEMBRANES
Vieth et al. STUDY OF POLY(METHACRYLATES) AND POLY(URETHANES) AS REVERSE OSMOSIS MEMBRANES. EFFECT OF WATER CLUSTERING ON TRANSPORT PROPERTIES
KR890003425A (en) Selective double layered polymer composite membrane
JPS5934163B2 (en) Method for separating organic substances with carboxylic acid groups
GRAEFE et al. Development of low pressure brackish water reverse osmosis membranes[Final Report]
FR2041348A5 (en) Support layer for semipermeable membranes
KR900003255A (en) Method of producing water softening membrane
Graefe Development of a Composite Reverse Osmosis Membrane for Single Pass Seawater Desalination

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years