Process for drying water-wet polycarbonate membranes

Details Process for drying water-wet polycarbonate membranes Process for drying water-wet polycarbonate membranes

1988-05-10

1989-07-04

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 36, F26B 308

Patent

active

048437336

ABSTRACT:
The invention is a process for drying water-wet polycarbonate membranes by contacting the membrane with a pretreatment fluid containing at least one C.sub.1-4 alcohol to remove residual solvent and non-solvent and/or tighten the membrane discriminating layer, followed by drying the membrane with air or an inert gas to evaporate the alcohol and/or water.

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patent: 3709774 (1973-01-01), Kimura
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patent: 4032309 (1977-06-01), Salemme
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patent: 4068387 (1978-01-01), Manos
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patent: 4430807 (1984-02-01), Davis et al.
patent: 4715960 (1967-12-01), Thompson
patent: 4772392 (1988-09-01), Sanders, Jr. et al.

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