COMPOSITE HOLLOW FIBER MEMBRANE

• Main Authors: TABATA, MOTOTSUGU, YAMADA, YASUHARU, SUZUKI, TOMOYUKI
• Format: Patent
• Language: English; French; Japanese
• Published: 04.10.2012
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; SPINNING; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

The objective of the present invention is to provide a composite hollow fiber membrane having superior gas separation properties. The present invention is provided with a compact layer at the inside surface or outside surface of a porous layer comprising a porous material, and the compact layer is formed from a branched polyimide material. L'objet de la présente invention réside en une membrane composite de fibres creuses présentant des propriétés de séparation de gaz supérieures. La présente invention comprend une couche compacte au niveau de la surface interne ou de la surface externe d'une couche poreuse comprenant un matériau poreux, et la couche compacte est formée à partir d'un matériau en polyimide ramifié.