Patent ID: 6515102
Filing Date: 2003-02-04
Classification: C08J,Y02P,Y02W

Abstract:
A process for recovering fluoropolymers, comprising:contacting an ion exchange membrane comprising a) a C-polymer which is a fluoropolymer having a carboxylic acid group, b) a S-polymer which is a fluoropolymer having a sulfonic acid group, and c) inorganic particles deposited on a surface of said ion exchange membrane, with a solvent which dissolves the C-polymer and the S-polymer; separating 1) a solution having the C-polymer and the S-polymer dissolved therein and 2) the inorganic particles; esterifying the C-polymer in the solution to obtain a precipitate of an ester of the C-polymer; and fractionating and recovering said precipitate and a solution having the S-polymer dissolved therein by solid-liquid separation.