Polyurethane-imide membranes and their use for the separation of

Details Polyurethane-imide membranes and their use for the separation of Polyurethane-imide membranes and their use for the separation of

1989-08-09

1990-05-29

Spear, Frank

Liquid purification or separation

Processes

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

210644, 210651, 21050039, B01D 1300

Patent

active

049293583

ABSTRACT:
Aromatics are separated from non-aromatics by permeation of the aromatic through a polyurethane-imide membrane. Permeation is conducted under pervaporation, perstraction, reverse osmosis, or dialysis conditions. The membrane is a polyurethane-imide membrane made using polyurethane-imide copolymers which are made by end capping a polyol with a polyisocyanate and then chain extending by reaction with an anhydride.

REFERENCES:
patent: 4474858 (1984-10-01), Makino et al.
patent: 4802987 (1989-02-01), Black

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