Reversible water-free process for the separation of acid-containing gas mixtures

US8288285B2 · kind B2 · utility

Assignee

• SOLVAY FLUOR GMBH · DE

Inventors

• Jens Olschimke · Hannover, DE
• Carsten Brosch · Seelze, DE
• Andreas Grossmann · Tuttlingen, DE

Key dates

• Filing date: Apr 1, 2011
• Grant date: Oct 16, 2012
• Expiry date: Apr 1, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/32
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Gas mixtures which comprise acids like HF, HCl or HBr and other constituents, especially gas mixtures which comprise or consist of carboxylic acid fluorides, C(O)F2 or phosphorous pentafluoride and HCl and optionally HF, can be separated by ionic liquids. The process is performed reversibly. Ionic liquids are applied the anion of which corresponds to a stronger acid than the acid to be removed. Highly purified products, for example, highly purified carbonyl fluoride can be obtained.