Dried porous acrylonitrile polymer membrane, process for produci

Details Dried porous acrylonitrile polymer membrane, process for produci Dried porous acrylonitrile polymer membrane, process for produci

1977-09-06

1979-12-04

Adee, John

Liquid purification or separation

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Material

210321R, B01D 1304

Patent

active

041771508

ABSTRACT:
Provided is dried porous membrane composed of acrylonitrile polymer walls separating predominantly interconnecting small-size pores. The membrane has surface layers integrated with a support layer to form a single continuous acrylonitrile polymer phase. At least one of the surface layers has pores of from 0.001 to 0.05 micron in average size, and the support layer has pores which are on the average larger than the pores in the surface layer or layers. The membrane has a porosity of from 20% to 70% by volume and a fragility of below 30. The membrane exhibits improved mechanical properties.

REFERENCES:
patent: 3615024 (1971-10-01), Michaels
patent: 4025439 (1977-05-01), Kamana et al.
patent: 4046843 (1977-09-01), Sano

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