Purification of ionic liquids

US8231792B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Martin Fiene · Niederkirchen, DE
• Harald Rust · Bochum, DE
• Klemens Massonne · Bad Dürkheim, DE
• Veit Stegmann · Mannheim, DE
• Oliver Huttenloch · Ispringen, DE
• Jorg Heilek · Bammental, DE

Key dates

• Filing date: Dec 6, 2005
• Grant date: Jul 31, 2012
• Expiry date: Aug 26, 2027

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D9/004
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a process for purifying an ionic liquid, which comprises the steps (a) partial crystallization of the ionic liquid from its melt and (b) separation of the crystals from the residual melt.