Method of removing nitrogen oxides from a gas flow

US6056928A · kind A · utility

Assignee

• BASF SE

Inventors

• Thomas Fetzer · Speyer, DE
• Eckhart Wagner · Ludwigshafen, DE
• Emil Roth · Caloundra, AU
• Wilhelm Ruppel · Mannheim, DE
• Hermann Wistuba · Mannheim, DE
• Bernhard Otto · Schifferstadt, DE
• Volker Schumacher · Bad Waldsee, DE
• Gert-Jan Burger · Mannheim, DE

Key dates

• Filing date: Mar 10, 1998
• Grant date: May 2, 2000
• Expiry date: Mar 10, 2018

Classification

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

Abstract

The invention relates to a process for removing nitrogen oxides from a gas stream containing same, which comprises passing the gas stream PA1 (A) through a stage for absorbing the nitrogen oxides other than N.sub.2 O in an absorbent or reacting the nitrogen oxides other than N.sub.2 O with an absorbent at a pressure of from 1,5 to 20 bar, and PA1 (B) through a stage for reducing the amount of N.sub.2 O, preferably employing the pressure level of step A, and to apparatus therefor and the use thereof.