Method for producing acrylic acid

US9309180B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Franz-Felix Kuppinger · Marl, DE
• Florian Klasovsky · Haltern am See, DE
• Alexander May · Seeheim-Jugenheim, DE
• Min-Zae Oh · Cologne, DE

Key dates

• Filing date: Jan 14, 2014
• Grant date: Apr 12, 2016
• Expiry date: Jan 14, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F20/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Method for producing acrylic acid by dehydration of a C3 hydroxycarboxylic acid, characterized in that dehydration is achieved by contacting, at a temperature of more than 150° C., the hydroxycarboxylic acid with a mixture which is liquid at this temperature and comprises at least one metal salt of a C3 hydroxycarboxylic acid, and water.