Microfiltration membrane filter

Details Microfiltration membrane filter Microfiltration membrane filter

1985-11-15

1988-04-12

Fisher, Richard V.

Liquid purification or separation

Filter

Material

21050038, B01D 3916

Patent

active

047372869

ABSTRACT:
A microfiltration membrane is made up dissolving m-phenylenediamine-isophthalic acid polymer, a high temperature aromatic polyamide, in one or more solvents selected from the group which consists of N-methylpyrrolidone, dimethylformamide and dimethylacetamide, and the resulting solution in the presence of two or more of these solvents, a structure-loosening agent such as water or a polyhydric alcohol, is cast. After gel formation in the film the latter is washed free from solvents and dried. The microfiltration membrane has high bursting strength and a pore point of 0.05 to 10 microns and a high permeability.

REFERENCES:
patent: 3408315 (1968-10-01), Paine
patent: 3567632 (1971-03-01), Richter et al.
patent: 3878109 (1975-04-01), Ikeda et al.
patent: 3899309 (1975-08-01), Hoehn et al.
patent: 4229291 (1980-10-01), Walch et al.
patent: 4233434 (1980-11-01), Kraus et al.
patent: 4340479 (1982-07-01), Pall

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