Water treatment method for heavy oil production
CA 2448680 A1 · Owner: Ge Ionics, Inc. · Inventors: Heins, William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An evaporation based method of treating produced water from heavy oil production. A produced water from heavy oil recovery operations treated by first removing oil and grease to a desired level preferably to about twenty parts per million or less, in deoiling step, (40). The pH is then adjusted normally downward and by acid addition in acid addition step (144), to release at least some carbonate alkalinity as free carbon dioxide. Feedwater is introduced into an evaporator (140), and the feedwater is evaporated to a selected concentration factor to produce: a distillate having a small amount of residual solutes; and an evaporator blowdown containing residual solids. Distillate may be …
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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 November 30, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 30, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 2024.
- 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.