Method for separating hydrogen chloride and phosgene

US7659430B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Andreas Woelfert · Bad Rappenau, DE
• Carsten Knoesche · Niederkirchen, DE
• Hans-Juergen Pallasch · Ludwigshafen, DE
• Martin Sesing · Waldsee, DE
• Eckhard Stroefer · Mannheim, DE
• Hans-Martin Polka · Mannheim, DE
• Manfred Heilig · Ludwigshafen am Rhein, DE

Key dates

• Filing date: Sep 10, 2005
• Grant date: Feb 9, 2010
• Expiry date: Sep 10, 2025

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2257/2045
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a process for separating hydrogen chloride and phosgene, which comprises bringing a mixture of hydrogen chloride and phosgene into contact with an ionic liquid in which at least part of the hydrogen chloride is dissolved in a step a) and then separating off the hydrogen chloride dissolved in the ionic liquid in a step b).