Patent ID: 9550717
Date: 2017-01-24
CPC Classifications: B01D,B01J,C07C

Claim:
1. A method for recovering an anionic fluorinated emulsifier, comprising: contacting a strongly basic ion exchange resin having an anionic fluorinated emulsifier adsorbed thereon to an aqueous inorganic acid solution and an organic solvent comprising a nitrile group, such that the anionic fluorinated emulsifier is eluted from the strongly basic ion exchange resin and that a liquid phase comprising an acid of the anionic fluorinated emulsifier is obtained; and recovering an acid of the anionic fluorinated emulsifier from the liquid phase, wherein after contacting the aqueous inorganic acid solution to the strongly basic ion exchange resin, the strongly basic ion exchange resin is separated from the aqueous inorganic acid solution and recovered, and thereafter to the separated and recovered strongly basic ion exchange resin, the organic solvent is contacted, to obtain the liquid phase.