Extraction of bitumen from bitumen froth and biotreatment of bitumen froth tailings generated from tar sands
CA 2350907 A1 · Owner: Budden, Julia R. · Inventors: Budden, Julia R.; Picavet, Merijn A.; Duyvesteyn, Willem P.C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the extraction of bitumen from bitumen froth generated from tar sands is disclosed. In this process, bitumen froth (9) is extracted from tar sands using a water process without requiring the use of caustic soda. The froth is treated in a counter-current decantation circuit with a paraffinic solvent to remove precipitated asphaltenes water, and solids from the bitumen , froth. A dilute bitumen product is produced having a final water and solids contents of about 0.01 to about 1 % by weight (32). This renders the dilute bitumen product amenable to direct hydrocracking. The process advantageously avoids the production of tailings sludges caused by clay dispersions. The …
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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
- Filed August 27, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 27, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 27, 2021.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.