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. 26, 2010
Filed:
Feb. 19, 2005
Karl-heinz Daum, Mainz, DE;
Wolf-christoph Rauser, Frankfurt am Main, DE;
Karl-Heinz Daum, Mainz, DE;
Wolf-Christoph Rauser, Frankfurt am Main, DE;
Outotec Oyj, Espoo, FI;
Abstract
There are described a process and a plant for producing sulfuric acid by catalytic oxidation of SOto SOand subsequent absorption of SOin sulfuric acid, wherein the SOis introduced into a first absorption stage and absorbed there in concentrated sulfuric acid, wherein the sulfuric acid having a higher concentration due to the absorption is passed through a heat exchanger and cooled, and wherein the non-absorbed SOis supplied to a second absorption stage for the further absorption in sulfuric acid. Before the first absorption stage a partial stream of SOis branched off and supplied directly to the second absorption stage.