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:
Feb. 11, 2003
Filed:
Nov. 16, 2000
Applicant:
Inventors:
Bernd Felix, Burgkirchen, DE;
Tilman Zipplies, Burghausen, DE;
Stephan Führer, Burgkirchen, DE;
Thomas Kaiser, Kelkheim, DE;
Armin Budesheim, Wiesbaden-Naurod, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 5/143 ; C07C 5/321 ; C07C 5/142 ;
U.S. Cl.
CPC ...
C07C 5/143 ; C07C 5/321 ; C07C 5/142 ;
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.