VERFAHREN ZUR ABTRENNUNG VON ASCORBINSÄURE AUS EINEM POLAREN, ASCORBINSÄURE UND 2-KETO-L- GULONSÄURE ENTHALTENDEN LÖSUNGSMITTEL

摘要

The invention relates to a method for the separation of ascorbic acid from a mixture containing ascorbic acid and 2-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.