Verfahren zur Wiederverwertung von fluorierten Polymeren aus einer Fluor-enthaltenden Ionenaustauschermembran

摘要

A process for recovering fluoropolymers, which comprises contacting an ion exchange membrane comprising a fluoropolymer having carboxylic acid groups (hereinafter referred to as a C-polymer) and a fluoropolymer having sulfonic acid groups (hereinafter referred to as a S-polymer) and having inorganic particles deposited on the surface, with a solvent to let it swell and to remove the inorganic particles from the surface, then, contacting it with a solvent which is a good solvent for the S-polymer and a poor solvent for the C-polymer to obtain a solid composed mainly of the C-polymer and a solution having the S-polymer dissolved therein, and recovering them by solid-liquid separation.