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:
Jan. 06, 2015
Filed:
Aug. 09, 2012
Michael Siemer, Mannheim, DE;
Michael Klein, Reichenbach-Steegen, DE;
Sunghee Son, Mannheim, DE;
Klemens Massonne, Bad Duerkheim, DE;
Uwe Vagt, Mannheim, DE;
Michael Siemer, Mannheim, DE;
Michael Klein, Reichenbach-Steegen, DE;
Sunghee Son, Mannheim, DE;
Klemens Massonne, Bad Duerkheim, DE;
Uwe Vagt, Mannheim, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present process purifies a salt CatX, where Catis any cation and Xis an organic anion having at least 6 carbon atoms. The salt is an impurity in a composition comprising a water-soluble salt (Cat)Y, where Yis an inorganic anion or an organic anion, different from X, with at most 10 carbon atoms. The process involves converting Xinto an acid HX by adding an acid (H)Z, forming two phases: an organic phase comprising HX and an aqueous phase comprising the water-soluble salts (Cat)Zand (Cat)Yor acids (H)Y. The organic phase is separated and the aqueous phase passes over a basic anion exchanger which binds Zand Yand liberates OH, giving an aqueous mixture comprising CatOH. The organic phase and the aqueous mixture are converted into CatXand HO, optionally with addition of further HX.