Pervaporation separation of ethanol-water mixtures using polyeth

Details Pervaporation separation of ethanol-water mixtures using polyeth Pervaporation separation of ethanol-water mixtures using polyeth

1985-06-19

1987-04-21

Lusignan, Michael R.

Coating processes

Foraminous product produced

Filter, sponge, or foam

210491, 21050027, 21050041, 427340, 4274301, B01D 2504, B01D 2946, B05D 418, B05D 500

Patent

active

046595902

ABSTRACT:
Synthetic, organic, polymeric membranes were prepared from polyethylenimine for use with pervaporation apparatus in the separation of ethanol-water mixtures. The polymeric material was prepared in dilute aqueous solution and coated onto a polysulfone support film, from which excess polymeric material was subsequently removed. Cross-links were then generated by limited exposure to toluene-2,4-diisocyanate solution, after which the prepared membrane was heat-cured. The resulting membrane structures showed high selectivity in permeating ethanol or water over a wide range of feed concentrations.

REFERENCES:
patent: 3951815 (1976-04-01), Wrasidlo
patent: 4039440 (1977-08-01), Cadotte

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