DE2622805A1 - Membrane filter of cellulose nitrate or acetate - treated by cpd. contg. free hydroxy groups - Google Patents

Membrane filter of cellulose nitrate or acetate - treated by cpd. contg. free hydroxy groups

Info

Publication number
DE2622805A1
DE2622805A1 DE19762622805 DE2622805A DE2622805A1 DE 2622805 A1 DE2622805 A1 DE 2622805A1 DE 19762622805 DE19762622805 DE 19762622805 DE 2622805 A DE2622805 A DE 2622805A DE 2622805 A1 DE2622805 A1 DE 2622805A1
Authority
DE
Grant status
Application
Patent type
Prior art keywords
cpd
mixt
membrane
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
DE19762622805
Other languages
German (de)
Other versions
DE2622805C2 (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.)
Seitz Filter Werke GmbH and Co
Original Assignee
Seitz Filter Werke GmbH and 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

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
    • B01D71/08Polysaccharides
    • B01D71/12Cellulose derivatives
    • B01D71/14Esters of organic acids
    • B01D71/16Cellulose acetate
    • 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
    • B01D67/0081After-treatment of organic or inorganic membranes
    • B01D67/0093Chemical modification
    • 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
    • B01D71/08Polysaccharides
    • B01D71/12Cellulose derivatives
    • B01D71/20Esters of inorganic acids, e.g. cellulose nitrate
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2323/00Details relating to membrane preparation
    • B01D2323/30Cross-linking

Abstract

Membrane filters based on cellulose nitrate or acetate are after-treated to increase their resistance to both alcohol and steam. Treatment is effected in a sol. of a cpd. (I) contg. free CH gps. either directly after mfr. or after an intermediate storage period. Pref. (I) is a dicyane, an acid anhydride (mixt) an acid chloride (mixt) or an epoxy-based cpd. Process is effective wihout excessive embrittlement or loss of strength.
DE19762622805 1976-05-21 1976-05-21 Expired DE2622805C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762622805 DE2622805C2 (en) 1976-05-21 1976-05-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762622805 DE2622805C2 (en) 1976-05-21 1976-05-21

Publications (2)

Publication Number Publication Date
DE2622805A1 true true DE2622805A1 (en) 1977-12-01
DE2622805C2 DE2622805C2 (en) 1982-11-11

Family

ID=5978676

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19762622805 Expired DE2622805C2 (en) 1976-05-21 1976-05-21

Country Status (1)

Country Link
DE (1) DE2622805C2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050864A1 (en) * 1980-10-27 1982-05-05 Amf Incorporated A hydrophilic cationic charge modified microporous membrane, a process for producing it and its use
US4707266A (en) * 1982-02-05 1987-11-17 Pall Corporation Polyamide membrane with controlled surface properties
US4966699A (en) * 1988-05-25 1990-10-30 Terumo Kabushiki Kaisha Hollow fiber membrane fluid processor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE805039C (en) * 1949-11-01 1951-05-07 Membranfiltergesellschaft Sart A process for the preparation of membrane filters
DE1154623B (en) * 1958-04-09 1963-09-19 American Mach & Foundry A process for the preparation of selective membranes
DE1930506A1 (en) * 1968-03-18 1970-01-02 Lubrizol Corp N-(3-hydroxyalkyl)-acrylamides, R1-CH(OH)-CR2R3-CR4R5-NH-CO-CR6=CH2 form (cross-linked) (co)polymers. Polymers are permeable to water vapour and gases and
DE2441311A1 (en) * 1974-08-29 1976-03-11 Hese Niels Membrane for purifying indl. effluents - by casting membrane from polymer soln. and treating with metal ion soln.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE805039C (en) * 1949-11-01 1951-05-07 Membranfiltergesellschaft Sart A process for the preparation of membrane filters
DE1154623B (en) * 1958-04-09 1963-09-19 American Mach & Foundry A process for the preparation of selective membranes
DE1930506A1 (en) * 1968-03-18 1970-01-02 Lubrizol Corp N-(3-hydroxyalkyl)-acrylamides, R1-CH(OH)-CR2R3-CR4R5-NH-CO-CR6=CH2 form (cross-linked) (co)polymers. Polymers are permeable to water vapour and gases and
DE2441311A1 (en) * 1974-08-29 1976-03-11 Hese Niels Membrane for purifying indl. effluents - by casting membrane from polymer soln. and treating with metal ion soln.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050864A1 (en) * 1980-10-27 1982-05-05 Amf Incorporated A hydrophilic cationic charge modified microporous membrane, a process for producing it and its use
US4707266A (en) * 1982-02-05 1987-11-17 Pall Corporation Polyamide membrane with controlled surface properties
US4966699A (en) * 1988-05-25 1990-10-30 Terumo Kabushiki Kaisha Hollow fiber membrane fluid processor

Also Published As

Publication number Publication date Type
DE2622805C2 (en) 1982-11-11 grant

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OD Request for examination
D2 Grant after examination
8339 Ceased/non-payment of the annual fee