Recovering anhydrous acrylic acid

US3932500A · kind A · utility

Assignee

• Badische Anilin- & Soda-Fabrik Aktiengesellschaft

Inventors

• Gerd Duembgen · Schifferstadt, DE
• Heinz Engelbach
• Walter Frey
• Richard Krabetz · Tauberbischofsheim, DE
• Ulrich Lebert · Hettenleidelheim, DE
• Hermann Spitzl
• Fritz Thiessen · Ludwigshafen, DE
• Carl-Heinz Willersinn · Ludwigshafen, DE

Key dates

• Filing date: Jul 17, 1972
• Grant date: Jan 13, 1976
• Expiry date: Jul 17, 1992

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/48
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Acrylic acid practically devoid of water, acrolein, formaldehyde and acetic acid is obtained at particularly low cost by countercurrent scrubbing and quenching of the reaction gas formed in the catalytic oxidation of propylene and/or acrolein with a high-boiling, extremely hydrophobic solvent followed by processing of the extract.