Process for the recovery of fluorinated alkandic acids from wastewater
AssigneesDyneon LLC, Axiva GmbH
InventorsBernd Felix, Tilman Zipplies, Stephan Führer, Thomas Kaiser, Armin Budesheim
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Abstract
The invention relates to a method for removing fluorinated emulsifying agent acids from waste waters, characterized in that the finely dispersed solids in the waste water are stabilized with a nonionic or cationic surfactant or an analogous acting surface active substance, the fluorinated emulsifying agent acids are subsequently bonded on an anion exchange resin and the fluorinated emulsifying agent acids are eluted from the latter.
Claims6
A process for the removal of fluorinated emulsifier acids and salts thereof from a wastewater stream that originates from the making of fluoropolymers, which wastewater stream contains finely divided fluoropolymer solids, the process comprising
- a) adding a non-ionic or cationic surfactant to the wastewater stream to stabilize the finely dispersed polymer solids and subsequently
- b) contacting the wastewater stream with an anion exchange resin to bind the fluorinated emulsifier acids and salts to the anion exchange resin.
Dependencies are inferred from the claim text.