Process for separation and recovery of metal values from sulfide ore concentrates
CA 1064708 A · Owner: Cyprus Metallurgical Processes Corporation · Inventors: Reynolds, James E.; Coltrinari, Enzo L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improvement in conventional processes for recovering metal values from sulfide ores containing lead zinc and silver, sulfides in which process the metal sulfides are converted to chlorides by chlorination followed by solubilization of the chlorides with a sodium chloride leach and subsequent recovery of the metals from their chlorides in accordance with a conventional flow sheet including crystallization, cementation precipitation, fused salt electrolysis etc. with chlorine being recovered, for reuse by electrolysis of the sodium chloride leach solution substantially depleted of lead, silver and zinc the improvement, being a pollution-free process which comprises: (1) recycling the …
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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 October 23, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 23, 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
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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.