The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 31, 1995
Filed:
Feb. 18, 1994
Wedigo von Wedel, Paris, FR;
Hubertus Eickhoff, Alzenau, DE;
Manfred Weck, Alzenau, DE;
John Tarabocchia, Friedrichsdorf, DE;
Ulrich Schelbert, Alzenau, DE;
Alexander Moller, Gelnhausen, DE;
Degussa Aktiengesellschaft, Frankfurt, DE;
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.