Hydrometallurgical purification process
CA 1065615 A · Owner: Cyprus Metallurgical Processes Corporation · Inventors: Goens, Duane N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved purification process is disclosed for use in conjunction with the hydrometallurgical recovery of copper from copper sulfide ores and concentrates the improved, process comprising removing substantially all of the cuprous chloride and cupric chloride from the solution to be purified by reacting these values with chalcopyrite at a temperature of at least about 110°C. in order to produce solid copper sulfides and a ferrous chloride solution containing various metal impurities. The process is primarily intended to be employed with copper recovery processes comprising leaching the copper feed material with ferric chloride in order to produce a solution comprising cuprous chloride, …
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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 November 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 6, 1996.
- 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.