Absorption medium and method for removing sour gases from fluid streams, in particular from flue gases

US8318117B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ute Lichtfers · Karlsruhe, DE
• Robin Thiele · Ludwigshafen, DE
• Susanna Voges · Ludwigshafen, DE
• Georg Sieder · Bad Dürkheim, DE
• Oliver Spuhl · Mannheim, DE
• Hugo Rafael Garcia Andarcia · Mannheim, DE

Key dates

• Filing date: Jun 9, 2009
• Grant date: Nov 27, 2012
• Expiry date: Jun 9, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02C20/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Absorption medium for acid gases comprising an oligoamine (A) of the general formula (I)and a primary or secondary alkanolamine (B) of the general formula (II)in which the weight ratio of oligoamine (A) to the primary or secondary alkanolamine (B) is 0.2 to 4, and also the process for removing acid gases from a gas stream by contacting the gas stream at a pressure of 0.05 to 10 MPa abs with an aqueous solution brought to and maintained at a temperature of 20 to 80° C. of said absorption medium.