Process for the extraction of amino acids from an aqueous phase

US4644067A · kind A · utility

Assignee

• SCHERING CORPORATION · US

Inventors

• Alfred Weber · Wien, AT
• Detlef Wilke · Wrisbergholzen, DE
• Johannes Kurzidim · Berlin, DE
• Mario Kennecke · Berlin, DE

Key dates

• Filing date: Jan 11, 1985
• Grant date: Feb 17, 1987
• Expiry date: Jan 11, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D209/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the extraction of aromatic (e.g., phenyl-containing) amino acids from an aqueous phase (solution) containing them, comprising combining the aqueous phase with a tenside of the formula EQU R--U--SO.sub.3 X wherein PA0 R is alkyl or cycloalkyl each of 4-18 carbon atoms; or phenyl or naphthyl, each optionally substituted by alkyl groups, and having up to 18 carbon atoms total. PA0 U is a carbon-to-sulfur bond or an oxygen atom, and PA0 X is an alkali metal ion; PA0 acidifying the aqueous phase to a pH value of 2.0-2.5; and PA0 extracting the aqueous phase with an alcohol, a ketone, or a carboxylic acid alkyl ester, each containing 4-6 carbon atoms.