NL7812663A - Polymeric filtration membranes - cast from solns. in water-immiscible solvents and immersed in alcohol bath, can be stored in the dry state - Google Patents

Polymeric filtration membranes - cast from solns. in water-immiscible solvents and immersed in alcohol bath, can be stored in the dry state

Info

Publication number
NL7812663A
NL7812663A NL7812663A NL7812663A NL7812663A NL 7812663 A NL7812663 A NL 7812663A NL 7812663 A NL7812663 A NL 7812663A NL 7812663 A NL7812663 A NL 7812663A NL 7812663 A NL7812663 A NL 7812663A
Authority
NL
Netherlands
Prior art keywords
water
membranes
dry state
stored
degrees
Prior art date
Application number
NL7812663A
Other languages
Dutch (nl)
Original Assignee
Wafilin Bv
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 Wafilin Bv filed Critical Wafilin Bv
Priority to NL7812663A priority Critical patent/NL7812663A/en
Publication of NL7812663A publication Critical patent/NL7812663A/en

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

Filtration membranes which can be stored in the dry state are made by casting a soln. of a macromolecular in a water-immiscible solvent, and immersing the polymer soln. in an alcohol bath after casting. The macromolecular material is e.g. cellulose acetate, dissolved in a water-immiscible chlorinated hydrocarbon solvent such as methylene chloride. Pref. after casting the film, the membrane is dried at 5-35 (18-23) degrees C for 0-180 (0-60) sec. before immersion in the alcohol bath. Treatment in the alcohol bath is carried out e.g. at 0-30 degrees C in isopropanol, (m)ethanol and/or other 1-8C alcohols. Pref. after the alcohol treatment and drying the membranes are subjected to heat treatment e.g. for 5-15 mins, esp. 10 mins at about 85 degrees C, e.g. in a water bath. The membranes are dried e.g. at 0 to 80 degrees C. The membranes are less brittle in the dry state than prior art membranes and can be handled and stored easily until required for use.
NL7812663A 1978-12-29 1978-12-29 Polymeric filtration membranes - cast from solns. in water-immiscible solvents and immersed in alcohol bath, can be stored in the dry state NL7812663A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7812663A NL7812663A (en) 1978-12-29 1978-12-29 Polymeric filtration membranes - cast from solns. in water-immiscible solvents and immersed in alcohol bath, can be stored in the dry state

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7812663A NL7812663A (en) 1978-12-29 1978-12-29 Polymeric filtration membranes - cast from solns. in water-immiscible solvents and immersed in alcohol bath, can be stored in the dry state

Publications (1)

Publication Number Publication Date
NL7812663A true NL7812663A (en) 1979-12-28

Family

ID=19832147

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7812663A NL7812663A (en) 1978-12-29 1978-12-29 Polymeric filtration membranes - cast from solns. in water-immiscible solvents and immersed in alcohol bath, can be stored in the dry state

Country Status (1)

Country Link
NL (1) NL7812663A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0185813A1 (en) * 1983-06-03 1986-07-02 Exxon Research And Engineering Company Method for preparing thin regenerated cellulose membranes of high flux and selectivity for organic liquids separations

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0185813A1 (en) * 1983-06-03 1986-07-02 Exxon Research And Engineering Company Method for preparing thin regenerated cellulose membranes of high flux and selectivity for organic liquids separations

Similar Documents

Publication Publication Date Title
GB1121119A (en) Improvements in nylon membrane filters
RU93058260A (en) METHOD FOR PRODUCING WATER-SOLUBLE MICRONIZED SUBSTANCES
DK0580648T3 (en) Method for conditioning water-soluble substances
DK637589A (en) PROCEDURE FOR POLLUTION REMOVAL
KR880002926A (en) How to make waterproof products and waterproof products
US3884801A (en) Preparation of reverse osmosis membranes by complete evaporation of the solvent system
KR900001397A (en) Composite membranes and methods for their preparation and use
US3842515A (en) Method for drying water-wet membranes
SE7605913L (en) DRYING OF POROSA MATERIAL
US3957935A (en) Process for the production of a dry desalting cellulose acetate membrane
GB1258543A (en)
GB1331715A (en) Method of lining feed bores of an open-pore support module with reverse-osmosis membranes
GB1325227A (en) Semi-permeable membranes
NL7812663A (en) Polymeric filtration membranes - cast from solns. in water-immiscible solvents and immersed in alcohol bath, can be stored in the dry state
ATE46634T1 (en) COATING ELEMENTS, PROCESS FOR THEIR MANUFACTURE AND THEIR USE.
ATE124881T1 (en) METHOD FOR DRYING WATER-WET POLYCARBONATE MEMBRANES.
GB1119303A (en) Reverse osmosis and membrane manufacture
JPS5581706A (en) Preparation of semi-permeable membrane
GB1276151A (en) Semipermeable membranes
EP0264229A3 (en) Process for preparing a polyimide membrane
FR2265454A2 (en) Polyether-polycarbonate block copolymer films - esp for haemodialysis made by casting from soln
IE39368B1 (en) Process and apparatus for coating food articels
US3857778A (en) Method of rendering electrophoresis membrane transparent
SU488048A1 (en) The method of drying porous materials
GB789211A (en) Dewatering solutions of organic acid esters of cellulose

Legal Events

Date Code Title Description
A1B A search report has been drawn up
BV The patent application has lapsed