Method for recovering elemental sulfur from coal-gas
CA 1263517 C · Owner: Calderon, Albert · Inventors: Calderon, Albert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved method for the recovery of elemental sulfur(S) from a coalgas containing hydrogen sulfide (H2S) wherein hot lime (CaO) is used and then regenerated according to the following chemistry: CaO + H2S = CaS + H2O, CaS + O2 = CaO + SO2 SO2 + C = S + CO2, These chemical reactions are conducted in-situ while the supply of carbon (C) for the formation of the elemental sulfur(S) is derived from a component of the coal-gas itself to increase the overall efficiency of desulfurization in-, crease the uniformity of the carbon deposit into the hot lime (CaO) and elimi-, nate the extra and cumbersome steps of physically moving the spent lime (CaO) for regeneration and returning it after …
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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 December 5, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 5, 2006.
- 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.