Process for producing acrylonitrile separation membranes in fibr

Details Process for producing acrylonitrile separation membranes in fibr Process for producing acrylonitrile separation membranes in fibr

1980-10-07

1983-10-11

Spear, Jr., Frank A.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

2105002, 264182, 2642091, B29D 2704, B01D 3100

Patent

active

044091621

ABSTRACT:
A process for producing hollow acrylonitrilic separation membranes in fibrous form which comprises shaping a membranous product in hollow fibrous form from a solution of acrylonitrile polymer dissolved in formamide-containing dimethylformamide while maintaining the temperature of said polymer solution within a specified range and subjecting said membranous product to a solvent removal treatment under a specific condition, thereby producing an acrylonitrilic separation membrane which is asymmetric, porous in structure, and excellent both in separation ability and in mechanical strength.

REFERENCES:
patent: 3950257 (1976-04-01), Ishii et al.
patent: 4066731 (1978-01-01), Hungerford
patent: 4173606 (1979-11-01), Stoy et al.

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