Distillation column for separating a liquid mixture into a plurality of pure fractions

US5785819A · kind A · utility

Assignee

• BASF SE

Inventors

• Gerd Kaibel · Lampertheim, DE
• Manfred Stroezel · Ilvesheim, DE
• Joachim Pfeffinger · Ludwigshafen, DE

Key dates

• Filing date: Jul 3, 1996
• Grant date: Jul 28, 1998
• Expiry date: Jul 3, 2016

Classification

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

Abstract

In a distillation column for separating a liquid mixture into a plurality of pure fractions, the distillation column being divided into 2 parts, a feed part and a take-off part, in its middle region by a separation effective in the longitudinal direction, the separation consists of two walls with a gas space in between, the distance between the two walls being from 1 to 50 mm, preferably from 3 to 10 mm.