Method and equipment for purifying an extraction solution from aqueous entrainment and impurities
CA 2526645 C · Owner: Vaarno, Jussi · Inventors: Ekman, Eero; Vaarno, Jussi; Nyman, Bror
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method and equipment with which an organic solution extraction solution is purified from entrainment of aqueous solution and impurities during hydrometallurgical liquid-liquid extraction. The method treats an organic extraction solution, which is loaded with a valuable metal or valuable substance from the aqueous solution. The extraction solution is scrubbed with an acidic aqueous solution. The acidic solution is discharged into the tank in several separate sub-streams. The flow diverts from horizontal to vertical and the direction of the separated solutions is deflected by means of picker fences (13 14). The organic solution and the , aqueous solution are …
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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 June 1, 2004 and granted May 15, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.