Method of removing fluorinated carboxylic acid from aqueous liquid

US7795332B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Klaus Hintzer · Woodbury, US
• Michael Jürgens · Rheydt, DE
• Harald Kaspar · Altötting, DE
• Herbert Koenigsmann · Altötting, DE
• Kai H. Lochhaas · Neuötting, DE
• Andreas Maurer · Zürich, CH
• Werner Schwertfeger · Altötting, DE
• Tilman C. Zipplies · Burghausen, DE
• George G. I. Moore · Afton, US
• Jay F. Schulz · Eagan, US
• Richard M. Flynn · Mahtomedi, US

Key dates

• Filing date: May 25, 2006
• Grant date: Sep 14, 2010
• Expiry date: Sep 11, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02C20/30
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method for removing a fluorinated carboxylic acid or salt thereof from an aqueous liquid by contacting the aqueous liquid with adsorbent particles. The fluorinated carboxylic acid or salt thereof is selected from the group consisting of partially fluorinated carboxylic acids or salts thereof and fully fluorinated carboxylic acids or salts thereof.