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1. (WO2017151935) METHOD FOR REMOVING PERFLUORINATED ALKANOIC ACIDS

Pub. No.:    WO/2017/151935    International Application No.:    PCT/US2017/020473
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Fri Mar 03 00:59:59 CET 2017
IPC: B01J 41/14
B01J 47/00
B01J 49/00
B01J 20/26
C07C 51/08
B01J 41/05
C08F 6/16
C02F 1/28
C02F 1/42
Applicants: 3M INNOVATIVE PROPERTIES COMPANY
Inventors: ZIPPLIES, Tilman, C.
HINTZER, Klaus
TRAUNSPURGER, Helmut
WEILANDT, Karl, D.
Title: METHOD FOR REMOVING PERFLUORINATED ALKANOIC ACIDS
Abstract:
Provided are methods for removing a perfluorinated alkanoic acid from solutions containing the perfluorinated alkanoic acid and a fluorinated alkoxy acid. These methods include contacting the first solution with an anion-exchange resin to produce a second solution and a resultant anion-exchange resin having perfluorinated alkanoic acid adsorbed thereto, wherein the perfluorinated alkanoic acid is present in the first solution at a first concentration and is present in the second solution at a second concentration which is lower than the first concentration, and separating the second solution from the resultant anion-exchange resin.