GB1504261A - Porous membrane and a process for its production - Google Patents

Porous membrane and a process for its production

Info

Publication number
GB1504261A
GB1504261A GB2729/76A GB272976A GB1504261A GB 1504261 A GB1504261 A GB 1504261A GB 2729/76 A GB2729/76 A GB 2729/76A GB 272976 A GB272976 A GB 272976A GB 1504261 A GB1504261 A GB 1504261A
Authority
GB
United Kingdom
Prior art keywords
production
porous membrane
acetylcellulose
ionic
ionic substances
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
GB2729/76A
Other languages
English (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.)
Aligena AG
Original Assignee
Aligena AG
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 Aligena AG filed Critical Aligena AG
Publication of GB1504261A publication Critical patent/GB1504261A/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
    • B01D71/08—Polysaccharides
    • B01D71/12—Cellulose derivatives
    • B01D71/14—Esters of organic acids
    • B01D71/16—Cellulose acetate
    • 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
    • B01D67/0093—Chemical modification
    • B01D67/00931—Chemical modification by introduction of specific groups after membrane formation, e.g. by grafting

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Transplantation (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
GB2729/76A 1975-01-23 1976-01-23 Porous membrane and a process for its production Expired GB1504261A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH82775A CH614127A5 (en) 1975-01-23 1975-01-23 Porous membrane and method for production thereof

Publications (1)

Publication Number Publication Date
GB1504261A true GB1504261A (en) 1978-03-15

Family

ID=4196116

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2729/76A Expired GB1504261A (en) 1975-01-23 1976-01-23 Porous membrane and a process for its production

Country Status (6)

Country Link
JP (1) JPS5723698B2 (enExample)
CH (1) CH614127A5 (enExample)
DE (1) DE2505254A1 (enExample)
FR (1) FR2298570A1 (enExample)
GB (1) GB1504261A (enExample)
IT (1) IT1053401B (enExample)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5738859A (en) * 1980-06-04 1982-03-03 Ciba Geigy Ag Manufacture of concentrated liquid dye composition
JPS57149360A (en) * 1981-03-06 1982-09-14 Ciba Geigy Ag Manufacture of concentrated aqueous composition of anionic dye
DE3231299A1 (de) * 1981-08-25 1983-03-10 CIBA-GEIGY AG, 4002 Basel Verfahren zur herstellung konzentrierter waesseriger zubereitungen von synthetischen anionischen dispergatoren und deren verwendung
GB2137527A (en) * 1983-03-25 1984-10-10 Ciba Geigy Ag Process for preventing the gelation of concentrated aqueous photoactivator solutions
US4604204A (en) * 1979-09-19 1986-08-05 Aligena Ag Porous, semipermeable membranes of chemically modified cellulose acetate
WO2001008792A3 (en) * 1999-07-30 2001-07-26 Genentech Inc Charged filtration membranes and uses therefor

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL63638A0 (en) * 1980-09-16 1981-11-30 Aligena Ag Semipermeable composite membranes,their manufacture and their use
EP0059782B1 (de) * 1981-03-06 1986-05-21 Ciba-Geigy Ag Verfahren zur Herstellung konzentrierter wässriger Farbstoffpräparate von anionischen Papier- oder Wollfarbstoffen
CH647021A5 (de) * 1981-09-22 1984-12-28 Ciba Geigy Ag Verfahren zur herstellung lagerstabiler aufhellerformulierungen.
CH648583A5 (de) * 1981-09-29 1985-03-29 Ciba Geigy Ag Verfahren zur herstellung von lagerstabilen farbstoffpraeparaten.
JPS59182863A (ja) * 1983-04-01 1984-10-17 Canon Inc 染料精製装置
JPS59182861A (ja) * 1983-04-01 1984-10-17 Canon Inc 染料精製装置
JPS59182862A (ja) * 1983-04-01 1984-10-17 Canon Inc 染料精製装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2419930A1 (de) * 1973-04-30 1974-11-07 Dorr Oliver Inc Ultrafiltrationsmembran und verfahren zu deren herstellung
JPS5210670B2 (enExample) * 1973-05-16 1977-03-25
DE2437594A1 (de) * 1974-08-05 1976-02-26 Riedel De Haen Ag Ionenaustauscher auf cellulosebasis und verfahren zu seiner herstellung

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4604204A (en) * 1979-09-19 1986-08-05 Aligena Ag Porous, semipermeable membranes of chemically modified cellulose acetate
JPS5738859A (en) * 1980-06-04 1982-03-03 Ciba Geigy Ag Manufacture of concentrated liquid dye composition
JPS57149360A (en) * 1981-03-06 1982-09-14 Ciba Geigy Ag Manufacture of concentrated aqueous composition of anionic dye
DE3231299A1 (de) * 1981-08-25 1983-03-10 CIBA-GEIGY AG, 4002 Basel Verfahren zur herstellung konzentrierter waesseriger zubereitungen von synthetischen anionischen dispergatoren und deren verwendung
GB2137527A (en) * 1983-03-25 1984-10-10 Ciba Geigy Ag Process for preventing the gelation of concentrated aqueous photoactivator solutions
US4552562A (en) * 1983-03-25 1985-11-12 Ciba Geigy Corporation Process for preventing the gelation of concentrated aqueous photoactivator solutions
WO2001008792A3 (en) * 1999-07-30 2001-07-26 Genentech Inc Charged filtration membranes and uses therefor
AU778022B2 (en) * 1999-07-30 2004-11-11 Genentech Inc. Charged filtration membranes and uses therefor
US7001550B2 (en) * 1999-07-30 2006-02-21 Genentech, Inc. Charged filtration membranes and uses therefor
US7153426B2 (en) * 1999-07-30 2006-12-26 Genentech, Inc. Charged filtration membranes and uses therefor

Also Published As

Publication number Publication date
FR2298570A1 (fr) 1976-08-20
JPS5199695A (enExample) 1976-09-02
IT1053401B (it) 1981-08-31
JPS5723698B2 (enExample) 1982-05-20
DE2505254C2 (enExample) 1987-11-19
CH614127A5 (en) 1979-11-15
DE2505254A1 (de) 1976-07-29
FR2298570B1 (enExample) 1979-02-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940123