Process for removing nitric oxides from processing exhaust gases

US4081511A · kind A · utility

Assignee

• Didier Engineering GmbH · DE

Inventors

• Karl H. Laue
• Theo Sander · Essen, DE
• Peter Sauder · Essen, DE
• Gotthard Uckert

Key dates

• Filing date: Nov 23, 1976
• Grant date: Mar 28, 1978
• Expiry date: Nov 23, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B21/38
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Exhaust gases containing residual nitric oxide constituents from a processing operation are maintained at an elevated pressure, heated to from 260.degree. to 340.degree. C., and subjected to catalytic reduction with ammonia to produce purified exhaust gases. The pressure of the thus purified exhaust gases is then relieved in an expansion turbine.