Method for esterifying (meth)acrylic acid with an alkanol

US6617470B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Heinrich Aichinger · Mannheim, DE
• Holger Herbst · Bischofswerda, DE
• Gerhard Nestler · Ludwigshafen, DE
• Jürgen Schröder · Ludwigshafen, DE
• Stefan Beckmann · Mannheim, DE

Key dates

• Filing date: May 11, 2001
• Grant date: Sep 9, 2003
• Expiry date: May 11, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/327
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In a process for esterifying (meth)acrylic acid with an alkanol in the presence of an esterification catalyst, in which unconverted starting compounds and (meth)acrylic ester to be formed are separated off by distillation and an oxyester-containing bottom product is formed, the bottom product is first separated off and then the oxyesters contained in it are cleaved in the presence of a relatively long-chain alkylbenzenesulfonic acid at elevated temperatures.