Continuous process for preparing methacrolein

US11919846B2 · kind B2 · utility

Assignee

• Röhm GmbH · DE

Inventors

• Alexander Lygin · Griesheim, DE
• Steffen Krill · Mühltal, DE
• Matthias Grömping · Darmstadt, DE
• Torsten Balduf · Pfungstadt, DE
• Rudolf Burghardt · Darmstadt, DE

Key dates

• Filing date: Aug 1, 2019
• Grant date: Mar 5, 2024
• Expiry date: Jan 15, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C47/22
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Methacrolein is prepared in a continuous process by a Mannich condensation reaction of formaldehyde with propanal. A methacrolein polymerization inhibitor is introduced during the production process and a part thereof is recycled back into the reactor where the Mannich condensation reaction is carried out.