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:
Jul. 25, 1989
Filed:
Jan. 21, 1988
Wolfgang Fennemann, Karben, DE;
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Disclosed is a process of simultaneously removing nitrogen oxides and sulfur dioxide from an oxygen-containing exhaust gas. An exhaust gas containing NO.sub.x and SO.sub.2 is mixed with NH.sub.3 and is then introduced as a fluidizing gas into a fluidized bed, which consists of a catalyst for effecting a reduction of NO with NH.sub.3 to form N.sub.2 and an oxidation of SO.sub.2 with O.sub.2 to form SO.sub.3. The catalyst consists of a carrier and of catalytically active substances consisting of V.sub.2 O.sub.5 and of Fe.sub.2 O.sub.3, FeSO.sub.4 and/or Fe.sub.2 (SO.sub.4).sub.3, and alkali sulfates. The SO.sub.3 formed by oxidation may be recovered as sulfuric acid or may be combined with a desulfurizing agent, which consists of Na.sub.2 CO.sub.3, MgO, MgCO.sub.3, CaO, CaCO.sub.3 and/or Ca(OH.sub.2).