Multilayer membrane and process of manufacturing the same

Details Multilayer membrane and process of manufacturing the same Multilayer membrane and process of manufacturing the same

1991-02-11

1993-02-02

Cannon, James C.

Liquid purification or separation

Processes

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

55 16, 55158, 55524, 55DIG5, 156281, 21032184, 210490, 21050042, 210506, 210644, 210908, 427381, 427394, 4274071, 428215, 428285, 428286, 428287, 4283115, 4283166, 4283193, B01D 3916, B01D 6136, B01D 7138

Patent

active

051835711

ABSTRACT:
A multilayer membrane is composed of a carrier layer, a porous supporting layer and a separating layer. The carrier layer consists of fibers of polyamide, polyvinylidene difluoride, polyester or glass; the porous supporting layer consists of a polysulfone, polyvinylidene difluoride, polyethersulfone, polyimide, polyvinyl alcohol, polyurethane, polyacrylonitrile or polyether imide; the separating layer consists of polyvinyl alcohol. The separating layer is nonporous and has a structure having a high microcrystalline content. A process of manufacturing that membrane is also described.

REFERENCES:
patent: 4619767 (1986-10-01), Kamiyama et al.
patent: 4753725 (1988-06-01), Linder et al.
patent: 4915834 (1990-04-01), Brunschke

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