CO-CAST THIN FILM COMPOSITE FLAT SHEET MEMBRANES FOR GAS SEPARATIONS AND OLEFIN/PARAFFIN SEPARATIONS

CO-CAST THIN FILM COMPOSITE FLAT SHEET MEMBRANES FOR GAS SEPARATIONS AND OLEFIN/PARAFFIN SEPARATIONS

A co-cast thin film composite flat sheet membrane is provided that comprises an asymmetric porous non-selective support layer with a thickness of 10-50 micrometers and an asymmetric integrally skinned polyimide-containing selective layer with a thickness of 5-40 micrometers on top of said support la...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: LIU, Chunqing, KARNS, Nicole K, LISKEY, Carl W
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Beschreibung
Zusammenfassung:A co-cast thin film composite flat sheet membrane is provided that comprises an asymmetric porous non-selective support layer with a thickness of 10-50 micrometers and an asymmetric integrally skinned polyimide-containing selective layer with a thickness of 5-40 micrometers on top of said support layer, wherein said asymmetric integrally skinned polyimide-containing selective layer comprises a porous non-selective polyimide-containing support layer with a thickness of 5-40 micrometers and a relatively porous, thin, dense, polyimide-containing top skin layer with a thickness of 0.02-0.2 micrometers.