Process for refining coal-based heavy oils
CA 1165258 A · Owner: Sumitomo Metal Industries, Ltd. · Inventors: Sasaki, Keiichi; Sunami, Yoshihiko; Iwahashi, Tohru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coal-based heavy oil is refined so as to remove quinoline insolubles and provide a hydrocarbon product suitable for making carbon stocks by heating to remove the volatile components which have boiling points ranging from the initial boiling point of the heavy oil to up to at least 200°C and at most 270°C, thereby leaving a residual coal-based heavy oil the, residual coal-based heavy oil is mixed with a ketone-type solvent having a boiling point less than 200°C to form an insoluble precipitate (including quinoline insolubles) and a supernatent the supernatent is treated to recover the ketone-type solvent and the remaining hydrocarbon mixture is easily processed by vacuum distillation to …
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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
- Granted April 10, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2001.
- 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.