Process for the purification of acrolein

US10556850B1 · kind B1 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Thorsten MERKER · Lechenich, DE
• Martin Koerfer · Alzenau, DE
• Michael EICKER · Moitzfeld, DE
• Bruno KRUDEWIG · Bonn, DE
• Rainer Malzkorn · Dorsten, DE
• Haohao ZHU · Euskirchen, DE

Key dates

• Filing date: Jul 24, 2019
• Grant date: Feb 11, 2020
• Expiry date: Jul 24, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C321/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for purifying acrolein. The process includes the steps of a) splitting a liquid feed stream containing acrolein into at least a first liquid stream and a second liquid stream, b) introducing the first liquid stream with a temperature T1 into a distillation column at a point between the top and the bottom of the distillation column, c) introducing the second liquid stream with a temperature T2 into the distillation column at the top of the distillation column, d) withdrawing an overhead vapor stream enriched in acrolein from the distillation column, and e) withdrawing a bottom stream depleted in acrolein. The temperature T2 of the second liquid stream in step c) is lower than the temperature T1 of the first liquid stream in step b).