Method for sealing breaches in multi-layer ultrathin membrane co

Details Method for sealing breaches in multi-layer ultrathin membrane co Method for sealing breaches in multi-layer ultrathin membrane co

1975-03-31

1976-09-14

Adee, John

Gas separation

Means within gas stream for conducting concentrate to collector

55 16, 156 94, 427140, 428320, 428412, 210500M, B01D 5322, B32B 3500

Patent

active

039804569

ABSTRACT:
A method is described for sealing pinholes and covering imperfections passing through a multi-layer membrane composite to be employed for conducting a gas separation process. The particular breaches through such composites that this invention is intended to deal with are those caused by the unavoidable presence of particles smaller than about 3000 A. By this method an additional ultrathin membrane of very flexible, permeable polymer material is applied over the outer surface of the membrane composite.

REFERENCES:
patent: 3325330 (1967-06-01), Robb
patent: 3650808 (1972-03-01), Gagnon
patent: 3852135 (1974-12-01), Cook et al.
patent: 3874986 (1975-04-01), Browall et al.

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