Solvent extraction process for the recovery of valuable metals from acidic leachates
CA 2391394 A1 · Owner: Koppl, Dietger · Inventors: Kehl, Ralf; Schwab, Werner; Koppl, Dietger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Multistage process for the recovery of valuable metals from an acidic aqueous , leachate solution in which valuable metal ions are present in concentrations of from 10 to 40 g/l, which comprises (I) liquid/liquid extraction of the leachate solution, where the leachate solution is brought into contact at least once with an organic, water-insoluble extractant (II) and subsequently , bringing the extractant loaded with valuable metal ions obtained from (I) into contact at least once with an acidic aqueous phase with the major part of the , valuable metal ions being transferred into the acidic aqueous phase (III) and , subjecting the acidic aqueous phase obtained from (II) to an …
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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 11, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 11, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 11, 2022.
- 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
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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.