High temperature depressurization for naphtha mercaptan removal
CA 2680472 C · Owner: Exxonmobil Research And Engineering Company · Inventors: Ernst, Richard Harry; Greeley, John Peter; Cook, Bruce Randall
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to naphtha hydrodesulfurization incorporating either high temperature depressurization or controlled heating for mercaptan removal. More particularly the invention relates to a naphtha hydrodesulfurization process wherein the hot naphtha exiting the desulfurization reactor (12) contains mercaptans most of which are removed without olefin loss by depressurizing the hot naphtha (14) thermally treating the hot naphtha, or some combination thereof. The desulfurized naphtha may be cooled and condensed to a liquid separated (16) from the gaseous H2S, stripped and sent to a mogas pool.
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 December 5, 2000 and granted July 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2022.
- 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.