Process for desulfurization of sulfur dioxide-containing gas streams
CA 1309840 C · Owner: Stowe, Donald H. Jr. · Inventors: Stowe, Donald H. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for desulfurizing sulfur dioxide-containing gases wherein the sulfur-containing gases are contacted with an aqueous solution of magnesium hydroxide in a wet scrubber wherein magnesium sulfite and magnesium bisulfite are formed a, portion of spent scrubbing medium is subjected to oxidation to convert the magnesium sulfite and the magnesium bisulfite therein to magnesium sulfate, the oxidized product is contacted with a magnesium-containing lime slurry to obtain magnesium hydroxide and calcium sulfate, calcium sulfate is separated from the resulting product and the magnesium hydroxide is recycled to the scrubber.
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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
- Granted November 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 2009.
- 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.