Gas-permeable laminate

Details Gas-permeable laminate Gas-permeable laminate

1989-04-12

1990-06-12

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050038, B01D 1300

Patent

active

049330829

ABSTRACT:
A gas-permeable laminate for separating a specific gas from a gaseous mixture comprising a gas-permeable membrane having excellent selectivity for the specified gas and a porous support supporting said membrane, said gas-permeable membrane being a multilayer laminated membrane comprising at least a first and a second ultrathin membrane having excellent selectivity for the specified gas and a third ultrathin membrane of a different material from the materials of the first and second ultrathin membranes and located between the first and second ultrathin membranes, the material of the third ultrathin membrane having a higher permeation coefficient with respect to the specified gas than the materials of the first and second ultrathin membranes.

REFERENCES:
patent: 3676335 (1972-07-01), Lacey et al.
patent: 3980456 (1976-09-01), Browall
patent: 4187086 (1980-02-01), Walmet et al.
patent: 4214020 (1980-07-01), Ward et al.
patent: 4230463 (1980-10-01), Henis et al.
patent: 4406673 (1983-09-01), Yamada et al.
patent: 4645602 (1987-02-01), Barnes, Jr. et al.

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