The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 05, 2010
Filed:
Mar. 10, 2006
Andreas Maurer, Altoetting, DE;
Klaus Hintzer, Kastl, DE;
Werner Schwertfeger, Altoetting, DE;
Egon Obermaier, Taubenbach, DE;
Astrid Weber, Garching, DE;
Andreas Maurer, Altoetting, DE;
Klaus Hintzer, Kastl, DE;
Werner Schwertfeger, Altoetting, DE;
Egon Obermaier, Taubenbach, DE;
Astrid Weber, Garching, DE;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
The invention provides a method for recovery of a fluorinated anionic surfactant from a basic anion exchange resin having quaternary ammonium groups, the method comprising eluting the anion exchange resin with a composition comprising an ammonium salt and a water miscible organic solvent. The method according to the invention may provide one or more of the following advantages. For example, the method can be designed to allow for recovery of substantially all of the fluorinated surfactant from a basic anion exchange resin having quaternary ammonium groups. Also, the liquid used for recovering the surfactant from the anion exchange resin is a simple liquid that can be readily and cost effectively manufactured. Further the process may be carried out in a convenient and easy manner. Furthermore, the method generally does not require large amounts of the eluting composition.