Process for solution control in an electrolytic zinc plant circuit
CA 1191813 A · Owner: Electrolytic Zinc Company Of Australasia Limited · Inventors: Pammenter, Robert V.; Palmer, David J.; Newman, Oliver M.G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for controlling the water balance and the concentration of impurities in an electrolytic zinc plant circuit with which is operated at least one selective zinc precipitation (SZP) process plant which comprises one or more of the steps, (a) a two-stage SZP process plant in which a compound containing calcium carbonate is used in the first-stage to precipitate portion of the zinc in incoming solution and a compound R containing zinc oxide preferably calcined zinc sulphide concentrate is used to precipitate most of the remaining zinc;, (b) displacement of the zinc depleted solution associated with solids leaving the SZP process plant by solution drawn from the electrolytic zinc plant …
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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
- Granted August 13, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 13, 2002.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.