Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1989-09-27
1991-02-05
Spitzer, Robert
Gas separation
Means within gas stream for conducting concentrate to collector
55 16, B01D 5322, B01D 7168
Patent
active
049901656
ABSTRACT:
Composite membranes are prepared by depositing a separation layer on an asymmetric support layer. The separation layer has a selectivity equal to or greater than that of the material of the asymmetric support layer for a desired gas separation. The support layer is desirable produced in non-asymmetric form, and exposed to an elevated temperature approaching the glass transition temperature of the support layer material under non-swelling conditions to modify the structure thereof to create asymmetry therein, before or after the deposition of the separation layer, and to increase its compaction resistance and collapse pressure. Such desirable properties are conveniently achieved on a repeatable basis, enhancing the uniformity and reliability of the treated support layer and of composite membranes produced therefrom, for use in gas separation operations.
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Bikson Benjamin
Miller James E.
Nelson Joyce K.
Fritschler Alvin H.
Spitzer Robert
Union Carbide Industrial Gases Technology Corporation
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