Method for producing (meth)acrylates

US8049030B2 · kind B2 · utility

Assignee

• Evonik Röhm GmbH · DE

Inventors

• Guido Protzmann · Bensheim, DE
• Harald Trauthwein · Munich, DE
• Joachim Knebel · Zwingenberg, DE
• Thorben Schuetz · Seeheim-Jugenheim, DE
• Gerhard Koelbl · Gernsheim, DE
• Thomas Kehr · Heilbad Heiligenstadt, DE
• Guenther Lauster · Worms, DE

Key dates

• Filing date: May 8, 2008
• Grant date: Nov 1, 2011
• Expiry date: May 8, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/54
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing (meth)acrylates, which comprises the transesterification of an alcohol with a low-boiling ester of (meth)acrylic acid in the presence of catalysts, with the alcohol liberated from the low-boiling ester of (meth)acrylic acid being separated off by distillation, characterized in that the molar ratio of low-boiling ester of (meth)acrylic acid to starting alcohol present in the reaction mixture is increased during the reaction by addition of low-boiling ester of (meth)acrylic acid. The process of the invention makes a particularly inexpensive preparation of (meth)acrylates having a very high purity possible.