Heterocyclic nitrogen removal from petroleum oils
CA 1294574 C · Owner: Washecheck, Don Miles · Inventors: Madgavkar, Ajay Madha; Washecheck, Don Miles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the removal of heterocyclic nitrogen compounds from a petroleum oil, which comprises treating a petroleum oil rich in heterocyclic nitrogen compounds in an extraction zone with an extractant comprising an aqueous solution of a carboxylic acid to yield a first extraction stream comprising a petroleum oil with a lean content of heterocyclic nitrogen compounds and a second extraction stream comprising an aqueous phase containing the carboxylic acid and having an increased content of heterocyclic nitrogen compounds, and subjecting at least part of the first extraction stream to a catalytic hydrotreatment in the presence of hydrogen and a hydrotreatment catalyst.
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
- Granted January 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 21, 2009.
- 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.