Ion exchange membrane for alkaline chloride electrolysis

C - Chemistry – Metallurgy – 25 – B

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C25B 13/08 (2006.01) C08J 5/22 (2006.01)

Patent

CA 2675991

Disclosed is an ion-exchange membrane for alkali chloride electrolysis, which has low electrical resistance and sufficient mechanical strength. Specifically disclosed is an ion-exchange membrane containing a polymer having a unit (U1) shown below. [chemical formula 1] (U1) In the above formula, Q1 and Q2 represent a perfluoroalkylene group or the like; Rf1 and Rf2 represent a perfluoroalkyl group; X1 represents an oxygen atom or the like; a represents 0 or the like; Y1 represents a fluorine atom or the like; r represents 0 or 1; and M represents a hydrogen atom or an alkali metal atom.

La présente invention concerne une membrane échangeuse d'ions pour une électrolyse de chlorure alcalin, qui présente une résistance électrique faible et une résistance mécanique suffisante. L'invention concerne en particulier une membrane échangeuse d'ions contenant un polymère comportant un motif (U1) montré ci-dessous. [Formule chimique 1] (U1) Dans la formule ci-dessus, Q1 et Q2 représentent un groupe perfluoroalkylène ou analogue ; Rf1 et Rf2 représentent un groupe perfluoroalkyle ; X1 représente un atome d'oxygène ou analogue ; a vaut 0 ou analogue ; Y1 représente un atome de fluor ou analogue ; r vaut 0 ou 1 ; et M représente un atome d'hydrogène ou un atome métallique alcalin.

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