GB1276151A - Semipermeable membranes - Google Patents

Semipermeable membranes

Info

Publication number
GB1276151A
GB1276151A GB2224969A GB2224969A GB1276151A GB 1276151 A GB1276151 A GB 1276151A GB 2224969 A GB2224969 A GB 2224969A GB 2224969 A GB2224969 A GB 2224969A GB 1276151 A GB1276151 A GB 1276151A
Authority
GB
United Kingdom
Prior art keywords
water
membrane
solvent
cellulosic
wet
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
GB2224969A
Inventor
Martin Eugene Rowley
Walter Dieter Slowig
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak 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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1276151A publication Critical patent/GB1276151A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0081—After-treatment of organic or inorganic membranes
    • B01D67/0095—Drying

Abstract

1276151 Cellulosic membrane EASTMAN KODAK CO 1 May 1969 [3 May 1968] 22249/ 69 Heading B1X [Also in Divisions B5 and C3] To produce a semi-permeable reverse osmosis membrane useful in desalinating water, a water-wet cellulosic semi-permeable membrane, e,g. of cellulose acetate, is dried by first contacting it with a water-miscible organic solvent (A) which is liquid in the range 5- 40‹C and is able to form a clear solution with at least 5% by wt of water, until at least 80%, preferably 90%, of the water is replaced by the solvent and then with a non-polar organic solvent (B) also liquid in the range 5-40‹C and which is able to form a clear solution with at least 5% of (A) until at least 70% of (A) is replaced by (B) which is then removed by evaporation and/or mechanical means. Bath (A) and (B) must be non-solvents for the membrane. Specified solvents are for (A), C 1 _ 4 alkanols and for (B) benzene, toluene, petrol ether, xylene, naphtha, diethyl ether, hexane and cyclohexane. The membrane may also be impregnated with a polyol (e.g. 5-70%) applied as a solution (e.g. 5-25%) in solvent (A). Specified are various glycols and glycerine. The wet membrane may be derived by casting a cellulosic solution followed by quenching in cold water. The wet film may be "tempered" in hot water before drying. Excess water and solvent (A) may be removed mechanically before contacting with solvent (B).
GB2224969A 1968-05-03 1969-05-01 Semipermeable membranes Expired GB1276151A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72655068A 1968-05-03 1968-05-03

Publications (1)

Publication Number Publication Date
GB1276151A true GB1276151A (en) 1972-06-01

Family

ID=24919056

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2224969A Expired GB1276151A (en) 1968-05-03 1969-05-01 Semipermeable membranes
GB145972A Expired GB1276152A (en) 1968-05-03 1969-05-01 Cellulosic semi-permeable membrane

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB145972A Expired GB1276152A (en) 1968-05-03 1969-05-01 Cellulosic semi-permeable membrane

Country Status (5)

Country Link
BE (1) BE732532A (en)
CA (1) CA923664A (en)
DE (1) DE1922536A1 (en)
FR (1) FR2007782A1 (en)
GB (2) GB1276151A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326076A2 (en) * 1988-01-29 1989-08-02 Hoechst Celanese Corporation Air dried cellulose acetate membranes
EP0465697A1 (en) * 1990-07-10 1992-01-15 Industrial Technology Research Institute Preparation of gas separation membrane and spiral wound gas separation module
CN103127744A (en) * 2011-11-28 2013-06-05 中国科学院金属研究所 Method for transferring nano-particles from oil phase into aqueous phase

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2736569B2 (en) * 1977-08-13 1979-07-19 Hoechst Ag, 6000 Frankfurt Viscous membrane for hemodialysis and process for their manufacture
SE423106B (en) * 1980-07-25 1982-04-13 Gambro Dialysatoren PLASMAFERES MEMBRANE AND WAY TO MANUFACTURE THIS
EP0046817B1 (en) * 1980-09-01 1984-11-28 Gambro, Inc. Dry polycarbonate membrane and process of manufacture

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326076A2 (en) * 1988-01-29 1989-08-02 Hoechst Celanese Corporation Air dried cellulose acetate membranes
EP0326076A3 (en) * 1988-01-29 1990-05-23 Air Products And Chemicals, Inc. Air dried cellulose acetate membranes
EP0465697A1 (en) * 1990-07-10 1992-01-15 Industrial Technology Research Institute Preparation of gas separation membrane and spiral wound gas separation module
CN103127744A (en) * 2011-11-28 2013-06-05 中国科学院金属研究所 Method for transferring nano-particles from oil phase into aqueous phase
CN103127744B (en) * 2011-11-28 2014-12-10 中国科学院金属研究所 Method for transferring nano-particles from oil phase into aqueous phase

Also Published As

Publication number Publication date
BE732532A (en) 1969-10-16
FR2007782A1 (en) 1970-01-09
CA923664A (en) 1973-04-03
DE1922536A1 (en) 1970-08-27
GB1276152A (en) 1972-06-01

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees