Absorption of sulfur oxides from hot gases
CA 1080443 A · Owner: Rockwell International Corporation · Inventors: Kohl, Arthur L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for removing sulfur oxides from a hot gas by sequential absorption of the sulfur oxides in two zones. In each zone the hot gas is contacted with an aqueous scrubbing medium which may be a solution or slurry containing an absorbent for the sulfur oxides. The absorbent is selected from the group consisting of alkali metal carbonates, bicarbonates and mixtures thereof. The preferred absorbent is sodium carbonate. The aqueous solution is introduced into the first zone in an amount to produce (1) a dry powder reaction product containing alkali metal sulfites, and sulfates substantially free of unreacted absorbent and (2) a substantially water-unsaturated gaseous reaction product of …
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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 July 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 1, 1997.
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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.