Purification of crude (meth)acrylic acid

US5482597A · kind A · utility

Assignee

• BASF SE

Inventors

• Holger Herbst · Bischofswerda, DE
• Gerhard Nestler · Ludwigshafen, DE
• Jerry Darlington · Lake Jackson, US
• Hans Martan · Bischofswerda, DE

Key dates

• Filing date: Nov 23, 1994
• Grant date: Jan 9, 1996
• Expiry date: Nov 23, 2014

Classification

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

Abstract

In a process for purifying crude (meth)acrylic acid, the crude (meth)acrylic acid is worked up by distillation after addition of an organic carboxylic acid hydrazide and, if desired, an organic sulfonic acid.