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:
Apr. 13, 2010
Filed:
Jul. 07, 2003
Gerd Kaibel, Lampertheim, DE;
Martin Merger, Ludwigshafen, DE;
Thomas Domschke, Speyer, DE;
Petra Deckert, Wiesloch, DE;
Friedrich Sauer, Obersuelzen, DE;
Gerd Kaibel, Lampertheim, DE;
Martin Merger, Ludwigshafen, DE;
Thomas Domschke, Speyer, DE;
Petra Deckert, Wiesloch, DE;
Friedrich Sauer, Obersuelzen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The invention relates to a method for the separation of ascorbic acid from a mixture containing ascorbic acid and-keto-L-gulonic acid in a polar, preferably aqueous solvent, by means of liquid/liquid extraction using an amide. The method preferably also comprises steps for the back-extraction of the ascorbic acid, recycling of the extraction solvent and/or the back extraction solvent and for isolation of the ascorbic acid from the back extraction solvent. The invention further relates to a method for the production of ascorbic acid from KGA and isolation of the ascorbic acid so produced.