METHOD FOR SEPARATING HYDROCARBON BY SEPARATION MEMBRANE

PROBLEM TO BE SOLVED: To provide a method for separating specific hydrocarbon from a hydrocarbon mixture, capable of being practically satisfied from the stand points of capacity and cost, by using a membrane comprising a fluorine- containing polyimide resin having high separation capacity with resp...

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Bibliographic Details
Main Authors IKEDA KENICHI, SHIMAZU AKIRA, MIYAZAKI TSUKASA
Format Patent
LanguageEnglish
Published 04.06.2002
Edition7
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To provide a method for separating specific hydrocarbon from a hydrocarbon mixture, capable of being practically satisfied from the stand points of capacity and cost, by using a membrane comprising a fluorine- containing polyimide resin having high separation capacity with respect to specific hydrocarbon. SOLUTION: The hydrocarbon mixture is brought into contact with one surface of a membrane based on the fluorine-containing polyimide resin with a glass transition temperature of 200-280 deg.C having a metal bond in the main chain portion within its repeating molecular unit structure and the specific hydrocarbon is selectively passed through the membrane to be separated. For example, the membrane comprising the fluorine-containing polyimide resin based on a repeating unit represented by formula 1 (wherein, m is a positive natural number and shows a degree of polymerization) or formula 2 is used.
Bibliography:Application Number: JP20000355672