A method and system for removing sulphide(s) from sour gas
CA 2114513 C · Owner: 609,577 Alberta Limited · Inventors: Galloway, Anthony J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for removing sulphide(s) from sour gas comprising contacting sour gas with a treatment agent comprised of make-up triazine. The treatment agent extracts sulphide(s) from the sour gas to sweeten the gas and form a residual solution comprised of a sulphinated component and an alkanolamine component. The sulphinated component of the solution is substantially separated from the alkanolamine component of the solution by decanting. Dithiazine and trithiane is crystallized out of the spent sulphinated component and removed from the process. Aldehyde is added to the remaining alkanolamine component to form a sulphide reactive agent. The sulphide reactive agent is combined with make-up …
Read the whole patent
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 28, 1994 and granted October 26, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2016.
- 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.