Obtaining alkanals having a 2-alkyl branch from alkanal mixtures

US5026920A · kind A · utility

Assignee

• BASF SE

Inventors

• Michael Roeper · Monsheim, DE
• Franz Merger · Bischofswerda, DE
• Joerg Liebe · Bischofswerda, DE
• Armin Volker Grenacher · Mutterstadt, DE
• Edgar Hahl · Ludwigshafen, DE

Key dates

• Filing date: Nov 8, 1989
• Grant date: Jun 25, 1991
• Expiry date: Nov 8, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/85
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Alkanals having a 2-alkyl branch are obtained from mixtures which contain the alkanals having a 2-alkyl branch in addition to n-alkanals, 3-alkylalkanals and/or further isomers by a process in which PA0 a) the alkanal mixture is reacted with an aqueous formaldehyde solution in the presence of a secondary amine and of a carboxylic acid as a catalyst, PA0 b) the aqueous phase containing the catalyst and any unconverted excess formaldehyde is separated off and PA0 c) the alkanals having a 2-alkyl branch are isolated by distillation from the condensates of the other alkanals with formaldehyde.