Process and plant for the manufacture of sulphuric acid from gases rich in sulphur dioxide
CA 2503221 C · Owner: Daum, Karl-Heinz · Inventors: Seitz, Ekkehart; Mueller, Hermann; Daum, Karl-Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is concerned with a process and a plant for the production of sulphuric acid wherein a sulphur dioxide-containing feed gas is converted, at least in part, with oxygen in at least two contact stages of main contacts arranged in series, to generate sulphur trioxide and wherein , generated sulphur trioxide-containing gas is conducted to an absorber and converted therein to sulphuric acid. In order to be able to economically process feed gases of a sulphur dioxide content of between 13 and 66 % by volume to sulphuric acid, using conventional catalysts it is suggested to , withdraw from a contact stage connected upstream of the last main contact stage, a partial …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 21, 2003 and granted December 4, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 21, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.