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|1. (WO2017151935) METHOD FOR REMOVING PERFLUORINATED ALKANOIC ACIDS|
|Applicants:||3M INNOVATIVE PROPERTIES COMPANY
|Inventors:||ZIPPLIES, Tilman, C.
WEILANDT, Karl, D.
|Title:||METHOD FOR REMOVING PERFLUORINATED ALKANOIC ACIDS|
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.