Composite membrane, its application and process for the dehydrat

Details Composite membrane, its application and process for the dehydrat Composite membrane, its application and process for the dehydrat

1995-03-22

1996-09-03

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

21050042, 21050043, B01D 6136

Patent

active

055520545

ABSTRACT:
The invention relates to a composite membrane with a porous polymer support layer and a polymer top layer, whereby the porous polymer support layer is of polyacrylonitrile (PAN), polyacrylamide, polyetheretherketone (PEEK), polyetherketone (PEK), polysulfon or polyethersulfon, whereas the polymer top layer is a dense layer comprising polyvinyl chloride with selective water permeability. Preferably the membrane is provided with a porous polyacrilonitril support layer and a polyvinyl chloride top layer. Further the invention comprises the application of such a composite membrane for the dehydration of organic solvents using such a composite membrane.

REFERENCES:
patent: 3950247 (1976-04-01), Chiang et al.
patent: 4230463 (1980-10-01), Henis et al.
patent: 4761232 (1988-08-01), Bright
patent: 4931181 (1990-06-01), Blume et al.
patent: 5028337 (1991-07-01), Linder et al.
patent: 5147549 (1992-09-01), Chou et al.
Patent Abstract of Japan vol. 11, No. 30 (C-400) 29 Jan. 1987 & JP.A.61 200 803 (Nakai Kenjiro) 5 Sep. 1986.
Patent Abstract of Japan vol. 3, No. 147 (C-66) 5 Dec. 1979 & JP.A.54 125 187 (Asahi Chem Ind Co Ltd) 28 Sep. 1979.

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