Process and system for removal of hydrogen sulfide from a gas stream
CA 2265622 C · Owner: Crystatech, Inc. · Inventors: Deberry, David W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process and system, for removing hydrogen sulfide from a gaseous, stream such as one of natural gas. A sour gas, stream containing H2S is contacted with a nonaqueous, water-insoluble sorbing liquor which comprises an, organic solvent for elemental sulfur, dissolved elemental, sulfur, an organic base to promote the reactions, and an organic solubilizing agent, an agent suitable for, maintaining the solubility of polysulfide intermediate, which may otherwise separate when they are, formed during operation of the process. Hydrogen, sulfide (H2S) gas is sorbed into this liquor and then, reacts with the dissolved sulfur in the presence of, the base to form polysulfide molecules. The solution …
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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 September 8, 1997 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 8, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 8, 2019.
- 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.