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:
May. 29, 2001
Filed:
May. 14, 1999
Georg Schmidt, Frankfurt am Main, DE;
Egon Winkler, Schwalbach, DE;
Hartmut Wagner, Moers, DE;
Ronald Apel, Moers, DE;
Roland Fach, Schermbeck, DE;
Dieter Knoblich, Duisburg, DE;
Peter-Bernhard Stougie, Duisburg, DE;
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Nitrosylsulphuric acid is mixed in a mixing reactor with sulphuric acid saturated with SO,. The acid mixture is led into a saturating reactor into the bottom region of which water and an SO,-containing gas are introduced. The gas partially serves as stripping gas inside the saturating reactor. SO,-saturated, No,-free sulphuric acid with 5 to 60 wt % H,SO,is removed from the bottom region of the saturating reactor and part thereof is mixed with nitrosylsulphuric acid in the mixing reactor.