Method of reducing moisture and solid content of bitumen extracted from tar sand minerals
CA 2262048 A1 · Owner: Bond, Gordon S. · Inventors: Bond, Gordon S.; Mishra, Surendra K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Tar sand is upgraded to produce a hydrocarbon having a low concentration of water, and solids by contacting a bitumen/diluent mix with an alkoxyalkylphenol alkoxylate surfactant, prior to separation of a recoverable hydrocarbon phase. The separation of the bitumen/diluent mix, into a recoverable hydrocarbon phase and a water/solid phase results in a recoverable hydrocarbon, phase that meets the concentration of water and solids desired by tar sand processors. A further, refinement of the method involves contacting the bitumen/diluent mix with an anionic and cationic, flocculant following the surfactant for further improvement in separation.
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 February 17, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 17, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 2021.
- 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.