Method of making membranes for gas separation and the composite

Details Method of making membranes for gas separation and the composite Method of making membranes for gas separation and the composite

1985-03-07

1986-07-29

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

427245, 4283044, 428327, 428903, B01D 5322

Patent

active

046029222

ABSTRACT:
Composite membranes suitable for separating gas mixtures are made by in situ crosslinking of aminoorganofunctional polysiloxane, 1 to 9 mol percent aminosiloxane units, with diisocyanate on the surface of a highly porous polymer substrate, such as polysulfone. Using the crosslinked polysiloxane as a gutter layer, a gas separating entity can be coated on the gutter layer to make a double layer composite membrane which has a higher separation factor than the crosslinked polysiloxane and can be used effectively for flat sheet membranes, as well as, hollow fiber membranes.

REFERENCES:
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patent: 4214020 (1980-07-01), Ward et al.
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patent: 4406673 (1983-09-01), Yamada et al.
patent: 4440643 (1984-04-01), Makino et al.
patent: 4444662 (1984-04-01), Conover
patent: 4493714 (1985-01-01), Ueda et al.

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