Patent · US Active

Method for the separation of ascorbic acid from a polar solvent containing ascorbic acid and 2-keto-L-gulonic acid

US7696360B2 · kind B2 · utility

0Cited by

5References

11Claims

0Family size

Assignee

BASF SE

Inventors

Gerd Kaibel · Lampertheim, DE
Martin Merger · Bischofswerda, DE
Thomas Domschke · Speyer, DE
Petra Deckert · Bammental, DE
Friedrich Sauer · Grünstadt, DE

Key dates

Filing date	Jul 7, 2003
Grant date	Apr 13, 2010
Priority date	—
Expiry date	Jul 30, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/582
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.