Composite membranes and their manufacture and use

Details Composite membranes and their manufacture and use Composite membranes and their manufacture and use

1987-07-10

1989-05-02

Sever, Frank

Liquid purification or separation

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Material

210640, 2103218, 21032189, 21050036, 21050041, 264 41, 264 459, 264178F, 264182, B01D 1301

Patent

active

048265993

ABSTRACT:
A method for producing a composite hollow fiber membrane by coating a porous hollow fiber substrate with a dilute solution of a membrane-forming composition containing a membrane-forming material and a solvent therefor by contacting the porous hollow fiber substrate with the composition, partially evaporating some of the solvent from the coated porous hollow fiber substrate, contacting the partially dried coating porous hollow fiber substrate with a coagulant and recovering the composite hollow fiber membrane. Also included are the composite hollow fiber membranes so produced and their use as permeable membranes for separating at least one fluid from at least one other fluid in a fluid mixture.

REFERENCES:
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patent: 3980456 (1976-09-01), Browall
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patent: 4155793 (1979-05-01), Salemme et al.
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patent: 4230463 (1980-10-01), Henis et al.
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patent: 4467001 (1984-08-01), Coplan et al.
patent: 4756932 (1988-07-01), Puri
patent: 4767422 (1988-08-01), Bikson et al.
Hackh's Chemical Dictionary; Fourth Edition; 1969; pp. 163, 381.
Dictionary of Scientific and Technical Terms; McGraw-Hill; 1976, 1974; pp. 283, 631.
I. Cabasso et al., "Composite Hollow Fiber Membranes", J. App. Polym. Sci., vol. 23, 1509-1525 (1979).

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