Recovery of sulfur from a hydrogen sulfide containing gas
CA 2553786 C · Owner: Van Yperen, Renee · Inventors: Borsboom, Johannes; Van Yperen, Renee; Van Warners, Anne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the recovery of sulfur from a hydrogen sulfide , containing gas, comprising (a) oxidizing part of the hydrogen sulfide in a gaseous stream with , oxygen or an oxygen containing gas in an oxidation stage to sulfur dioxide and thereafter , reacting the major part of the remaining hydrogen sulfide and the major part of sulfur dioxide , to elemental sulfur and water (b) reacting the product gas of oxidation stage a) in at least , three catalytic reaction systems and (c) selectively oxidizing H2S in the gas leaving stage b) , (in particular leaving the last sub-dewpoint Claus reactor) to elemental sulfur, preferably , employing for this purpose a …
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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 January 14, 2005 and granted September 25, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 14, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.