Purification of crude (meth) acrylic acid

US6207022A · kind A · utility

Assignee

• BASF SE

Inventors

• Toni Dockner
• Gerhard Nestler · Ludwigshafen, DE
• Holger Herbst · Bischofswerda, DE
• Helmut Lermer · Ludwigshafen, DE
• Hans Martan · Bischofswerda, DE
• Herbert Vogel · Ludwigshafen, DE
• Herbert Exner · Waldsee, DE

Key dates

• Filing date: Oct 7, 1994
• Grant date: Mar 27, 2001
• Expiry date: Oct 7, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/22
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Crude (meth)acrylic acid is purified by a process in which a primary amine compound and an organic sulfonic acid are added to the crude (meth)acrylic acid and the latter is then worked up by distillation.