ION-EXCHANGE MEMBRANE

PROBLEM TO BE SOLVED: To prepare an ion-exchange membrane having high current efficiency and low electric resistance, excellent in a balance of strengths, and capable of reducing an alkali chloride concentration in an alkali hydroxide, which is a product. SOLUTION: The ion-exchange membrane comprise...

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Bibliographische Detailangaben
Hauptverfasser:	OSAKI AKIKO, DOI SHOICHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON ELECTROLYTIC OR ELECTROPHORETIC PROCESSES ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prepare an ion-exchange membrane having high current efficiency and low electric resistance, excellent in a balance of strengths, and capable of reducing an alkali chloride concentration in an alkali hydroxide, which is a product. SOLUTION: The ion-exchange membrane comprises at least two layers consisting of a first layer comprising of a polymer including repeated units represented by formula: (wherein Y is selected from COOH, CN, COF, and COOR; X is selected from Cl, Br and F; and Rt and Rt' are each selected from a perfluoroalkyl group and a fluorochloroalkyl groups each having a 1-10C.), and a second layer comprising a polymer including repeated units represented by a formula: (wherein Y' is selected from SO3 H, SO2 F, SO3 Na, SO3 K, SO2 NH2 , and SO2 NH4 ; Rt" and R''' are each selected from a perfluoroalkyl group and a fluorochloroalkyl group., each having a 1-10C).