Method for removing acid gases and ammonia from a fluid stream

US7485275B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Norbert Asprion · Ludwigshafen, DE
• Ute Lichtfers · Karlsruhe, DE
• Christoph Groβmann · Hamburg, DE

Key dates

• Filing date: Jul 13, 2006
• Grant date: Feb 3, 2009
• Expiry date: Apr 30, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/151
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method is provided for removing acid gases and ammonia from a fluid stream in which a fluid stream comprising acid gases and ammonia is brought into contact with an aqueous absorption medium. The fluid stream is depleted of acid gases and ammonia and the absorption medium stream, which is charged with acid gases and ammonia, is regenerated in a desorption step. The acid gases and the ammonia are stripped out of the absorption medium and the condensable fractions thereof are condensed. A condensate and also a purified absorption medium stream are obtained. The condensate is ejected in part or completely from the desorption step, or feed in part or completely to a distillation column in which ammonia is separated off overhead as an aqueous solution or in the pure state. A aqueous bottom stream is obtained which is recycled to the absorption step or the desorption step.