GB2009031A - Cellulose Membranes - Google Patents

Cellulose Membranes

Info

Publication number
GB2009031A
GB2009031A GB7843859A GB7843859A GB2009031A GB 2009031 A GB2009031 A GB 2009031A GB 7843859 A GB7843859 A GB 7843859A GB 7843859 A GB7843859 A GB 7843859A GB 2009031 A GB2009031 A GB 2009031A
Authority
GB
United Kingdom
Prior art keywords
membranes
cellulose
cellulose acetate
cellulose membranes
cellulose nitrate
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.)
Granted
Application number
GB7843859A
Other versions
GB2009031B (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.)
Johns Manville Corp
Johns Manville
Original Assignee
Johns Manville Corp
Johns Manville
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 US05/953,377 external-priority patent/US4220477A/en
Application filed by Johns Manville Corp, Johns Manville filed Critical Johns Manville Corp
Publication of GB2009031A publication Critical patent/GB2009031A/en
Application granted granted Critical
Publication of GB2009031B publication Critical patent/GB2009031B/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
    • B01D71/22—Cellulose ethers
    • 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
    • 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
    • B01D71/20—Esters of inorganic acids, e.g. cellulose nitrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/147—Microfiltration

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

Microfiltration membranes comprise 10% to 50% cyanoethylated polysaccharide ether polymers blended with 50% to 90% polymers of cellulose nitrate, cellulose acetate or mixtures of the two. These membranes are flexible and strong and can be readily pleated for use in cartridge filters as well as used flat in conventional single- or multi-plate holders. They are also more thermally stable than conventional "mixed ester" (cellulose nitrate/cellulose acetate) membranes. Membranes are formed by wet or dry phase inversion casting.
GB7843859A 1977-11-18 1978-11-09 Flexible microporous cellulosic membranes and methods of formation and use thereof Expired GB2009031B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US85277677A 1977-11-18 1977-11-18
US05/953,377 US4220477A (en) 1978-10-23 1978-10-23 Flexible microporous cellulosic membranes and methods of formation and use thereof

Publications (2)

Publication Number Publication Date
GB2009031A true GB2009031A (en) 1979-06-13
GB2009031B GB2009031B (en) 1982-03-10

Family

ID=27127086

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7843859A Expired GB2009031B (en) 1977-11-18 1978-11-09 Flexible microporous cellulosic membranes and methods of formation and use thereof

Country Status (8)

Country Link
JP (1) JPS5490082A (en)
BR (1) BR7807556A (en)
CA (1) CA1096556A (en)
DE (1) DE2849863C3 (en)
FR (1) FR2409077A1 (en)
GB (1) GB2009031B (en)
IE (1) IE47585B1 (en)
IT (1) IT7851950A0 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19613484A1 (en) * 1996-04-04 1997-10-09 Buna Sow Leuna Olefinverb Gmbh Biodegradable gas separation membrane with high selectivity for carbon di:oxide permeation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE329117C (en) * 1916-08-21 1920-11-15 Richard Zsigmondy Dr Membrane filters and processes for their manufacture
DE1017596B (en) * 1956-07-04 1957-10-17 Membranfiltergesellschaft Sart Method and device for the continuous production of membrane filters
JPS5538366B2 (en) * 1974-03-13 1980-10-03
GB1430323A (en) * 1974-03-20 1976-03-31 Chem Systems Process for the preparation of asymmetric reverse osmosis membranes

Also Published As

Publication number Publication date
JPS5490082A (en) 1979-07-17
FR2409077B1 (en) 1984-11-16
GB2009031B (en) 1982-03-10
BR7807556A (en) 1979-07-24
DE2849863B2 (en) 1981-03-12
JPS5634132B2 (en) 1981-08-08
DE2849863A1 (en) 1979-05-31
CA1096556A (en) 1981-03-03
IE782266L (en) 1979-05-18
FR2409077A1 (en) 1979-06-15
IE47585B1 (en) 1984-05-02
IT7851950A0 (en) 1978-11-17
DE2849863C3 (en) 1982-06-24

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee