Interfacially polymerized membranes for the reverse osmosis sepa

Details Interfacially polymerized membranes for the reverse osmosis sepa Interfacially polymerized membranes for the reverse osmosis sepa

1989-10-05

1992-12-22

Spear, Frank

Liquid purification or separation

Processes

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

210490, B01D 6102

Patent

active

051731916

ABSTRACT:
Interfacially polymerized, crosslinked membranes on microporous, organic solvent resistant ultrafiltration membrane backing are useful for the separation of organic mixtures under reverse osmosis conditions. The membranes are prepared by depositing an aqueous (or conversely non-aqueous) solution of a first component on the microporous backing, draining off the excess quantity of this first solution and then applying a second component in the form of a non-aqueous (or conversely aqueous) solution. The two components interact and polymerize at the interface between the aqueous phase and the non-aqueous phase to produce a highly crosslinked thin polymer layer on the microporous ultrafiltration support backing layer.

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