Process for producing semipermeable membrane

Details Process for producing semipermeable membrane Process for producing semipermeable membrane

1978-09-12

1981-01-13

Smith, Ronald H.

Liquid purification or separation

Processes

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

2105002, 427400, 427245, B01D 1300, C02F 144

Patent

active

042448174

ABSTRACT:
A process for preparing a semipermeable membrane, which comprises contacting a thin polyamine film applied to a liquid-permeable microporous substrate with a polyalicyclic diisocyanate or polyalicyclic dicarbonyl halide capable of reacting with the amino or imino groups in the polyamine, thereby to crosslink the polyamine at the surface portion of the thin film.

REFERENCES:
patent: 3686116 (1972-08-01), Rio
patent: 3951815 (1976-04-01), Wrasidlo
patent: 3960920 (1976-06-01), Ohotsubo
patent: 4002563 (1977-01-01), Vogl et al.
patent: 4005012 (1977-01-01), Wrasidlo
patent: 4039440 (1977-08-01), Cadotte

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