Method and system for removal of sulfur and dust from waste gases
CA 2446500 A1 · Owner: Windschmitt, Franz · Inventors: Windschmitt, Franz; Bandel, Gebhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and system for removing sulfur and dust from waste gases, particularly refinery waste gases wherein, the waste gas to be cleaned is passed to a scrubbing tower above a scrubber sump and, in order to remove SO2 and acidic gases, scrubbed in a scrubbing zone of the scrubbing tower in counter-current with a scrubbing fluid that is drawn from the scrubber sump and passed to spray nozzles at the upper end of the scrubbing zone. Sulfites contained in the scrubber sump are oxidized to form sulfates by means of, gasification with air in the scrubber sump or in an external device assigned to the scrubber sump. A suspension stream is drawn from the scrubber sump. The gas that leaves the …
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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 27, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 27, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 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
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.