Process for the mild distillative separation of mixtures

US7435319B2 · kind B2 · utility

Assignee

• LANXESS Deutschland GmbH · DE

Inventors

• Ludwig Deibele · Neunburg vorm Wald, DE
• Dieter Heinz · Heppenheim, DE
• Jan Thomas Leu · Leichlingen, DE
• Johannes-Peter Schafer · Lingen (Ems), DE
• Kai Fahrenkamp · Leverkusen, DE
• Wolfgang Scheinert · Leverkusen, DE
• Thomas Schilling · Albuquerque, US
• Paul Wagner · Mülheim an der Ruhr, DE

Key dates

• Filing date: May 12, 2003
• Grant date: Oct 14, 2008
• Expiry date: Jan 24, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/13
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a semibatchwise process for the mild distillative separation of mixtures, in a first stage a column being supplied continuously with a feed and the feed being separated at least into different fractions, one of the fractions being removed continuously into a container, and, in a second step, the fraction removed into the container being recycled to the column and being separated again batchwise into different fractions.