Method for drying porous ultrafiltration membranes

Details Method for drying porous ultrafiltration membranes Method for drying porous ultrafiltration membranes

1993-05-10

1995-01-31

Dawson, Robert A.

Liquid purification or separation

Filter

Material

21050041, 21050027, 264 48, B01D 3900

Patent

active

053856708

ABSTRACT:
A method for drying porous ultrafiltration membranes by the use of heat and possibly also at reduced pressure is characterized in that prior to the application of heat the pores of the membranes are at least partially filled with a solution of a water-soluble organic solid which swells the membranes and which has a melting point above 35.degree. C. in an organic solvent which is completely miscible with water and which does not change the membrane structure.

REFERENCES:
patent: 4384047 (1983-05-01), Benzinger et al.
patent: 4704130 (1987-11-01), Gilding et al.
patent: 4818387 (1989-04-01), Ikeda et al.
patent: 4867934 (1989-09-01), Repetti et al.
patent: 5032331 (1991-07-01), Onishi et al.
patent: 5181490 (1993-01-01), Bikson et al.
patent: 5215662 (1993-06-01), Johnson et al.

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