Composite membrane, process for its production and its use

US5342432A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Michael Haubs · Bad Kreuznach, DE
• Werner Prass · Mainz, DE

Key dates

• Filing date: Jul 2, 1994
• Grant date: Aug 30, 1994
• Expiry date: Jul 2, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B2210/0046
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Composite membrane, process for its production and its use A composite membrane for gas separation having a three-layer structure, constructed from PA1 A) a supporting membrane layer made of porous polymer, PA1 B) a nonporous, gas-permeable intermediate layer, PA1 C) a permselective layer of regularly arranged organic molecules having a layer thickness of 3 to 100 nm, the layers (A) and (C) enclosing the intermediate layer (B), wherein the permselective layer (C) is constructed from regularly arranged amphiphilic molecules which contain one or two alkyl chains each having 7 to 25 carbon atoms per polar hydrophilic group.