Composite solvent resistant nanofiltration membranes

Details Composite solvent resistant nanofiltration membranes Composite solvent resistant nanofiltration membranes

1999-01-25

2000-09-05

Drodge, Joseph W.

Liquid purification or separation

Processes

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

210490, 21050027, 21050042, 264 41, 427246, B01D 6912, B01D 7158

Patent

active

061137944

ABSTRACT:
The invention disclosed relates to a nanofiltration composite membrane that is solvent and pH stable and may be used to separate at least one dissolved or suspended component from a liquid phase, including
(a) a substrate ultrafiltration membrane formed from an ethylenically unsaturated nitrile, such as acrylonitrile and substituted acrylonitrile polymers, and
(b) a coating of a hydrophilic polymer containing reactive functional groups.
Preferably, the reactive functional groups described in (b) are subjected to a post-coating cross-linking reaction with a substantially non-cytotoxic cross-linking agent such as bi-functional aldehydes. A method for the preparation of such composite membranes is also disclosed.

REFERENCES:
patent: 5032282 (1991-07-01), Linder et al.
patent: 5039421 (1991-08-01), Linder et al.
patent: 5505859 (1996-04-01), Dunweg et al.

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