Method for separating a liquid crude aldehyde mixture by distillation

US6511583B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Rolf Muller · Karben, DE
• Willi Schönmann · Schifferstadt, DE

Key dates

• Filing date: Sep 24, 2001
• Grant date: Jan 28, 2003
• Expiry date: Sep 24, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a process for the fractional distillation of a liquid crude aldehyde mixture including straight-chain and branched aldehydes, the product mixture is fractionated in a first distillation column to give a product stream of branched aldehyde, a product stream of straight-chain aldehyde and a further product stream including straight-chain aldehyde and the high boiling constituents. The further product stream is then fractionated in a second distillation column whose packing volume is a factor of from 50 to 200 smaller than that of the first distillation column to give a product stream of straight-chain aldehyde and a high boiler product stream.