Continuous process for mass transfer of a liquid reagent with two different gases
CA 2065547 C · Owner: Wheelabrator Clean Air Systems Inc. · Inventors: Hardison, Leslie C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for removing H2S from a process gas, including a residence chamber between an absorption chamber and an oxidizer chamber in the, polyvalent metal redox catalyzed removal of H2S from a process gas. The process and apparatus of the present invention inclues a first gas-liquid mass transfer zone or absorber chamber for intimately contacting an H2S-containing process gas with an oxidized polyvalent metal redox solution for absorption of the H2S; and a residence chamber in fluid communication with polyvalent metal redox solution exiting the absorption chamber through a valve-controlled cross-flow conduit. Cross flow of solution from the absorber chamber through a valve or …
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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 April 7, 1992 and granted April 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2014.
- 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.