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:
Nov. 23, 2010
Filed:
Feb. 11, 2006
Karl-heinz Daum, Mainz, DE;
Karl-Heinz Daum, Mainz, DE;
Outotec Oyj, Espoo, FI;
Abstract
The invention relates to a process and plant for producing sulphuric acid by catalytic oxidation of SOto form SOin a converter with at least one contact stage, the SO-containing process gas, after it has passed through at least one contact stage, being withdrawn from the converter and fed to an apparatus for recovering heat, in which steam is generated from feedwater by means of the heat of the process gas, and the process gas then being fed to an absorber, in which the SOis absorbed in sulphuric acid. To improve the utilization of heat during the production of sulphuric acid, the feedwater is fed to the heat recovery apparatus at a higher temperature than the process gas fed to the absorber.