Process for the degradation of highly toxic halogenated organic compounds contained in gases

US5463170A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Wedigo von Wedel · Friedrichsdorf, DE
• Hubertus Eickhoff · Alzenau, DE
• Manfred Weck · Alzenau, DE
• John Tarabocchia · Friedrichsdorf, DE
• Ulrich Schelbert · Alzenau, DE
• Alexander Moller · Gelnhausen, DE

Key dates

• Filing date: Feb 18, 1994
• Grant date: Oct 31, 1995
• Expiry date: Feb 18, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D53/70
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Disclosed is a process for the degradation of highly toxic halogenated organic compounds, in particular polychlorinated dibenzodioxins (PCDD) and dibenzofurans (PCDF), contained in gases containing no SO.sub.2 by oxidation using preferably hydrogen peroxide. The SO.sub.2 -free gas is passed, in the presence of hydrogen peroxide, over a substantially inorganic solid contact catalyst, in particular pyrogenic or precipitated silica or aluminum silicate. A residual PCDD/PCDF content of below 0.1 ng TE/Nm.sup.3 may be achieved in the thus treated gas; the highly toxic compounds are oxidized on the solid contact catalyst.