Asymmetric polyimide membranes

Details Asymmetric polyimide membranes Asymmetric polyimide membranes

1976-04-15

1978-09-12

Foelak, Morton

Liquid purification or separation

Filter

Material

260 308DS, 260 324, 260 326N, 260 326NR, 260 336R, 260 338R, 264 41, 521 61, B01D 3100

Patent

active

041136284

ABSTRACT:
Asymmetric polyimide membranes are prepared from tetracarboxylic acid dianhydrides and diamines. They are semipermeable and useful in the separation of different chemical species by osmosis, dialysis, electrodialysis and reverse osmosis.

REFERENCES:
patent: 3179630 (1965-04-01), Endrey
patent: 3179631 (1965-04-01), Endrey
patent: 3352388 (1974-12-01), Kimura
patent: 3483144 (1969-12-01), Lavin et al.
patent: 3852388 (1974-12-01), Kimura

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