Hydrometallurgical process for metal sulphides
CA 1063809 A · Owner: Sherritt Gordon Mines Limited · Inventors: Genik-Sas-Berezowsky, Roman M.; Swinkels, Godefridus M.; Milner, Edward F.G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydrometallurgical process for the separate recovery of non-ferrous, ferrous, and precious metal values and sulphur from metal sulphide ore concentrates using a chloride lixiviant. A first embodiment of the process is directed to the recovery of copper by leaching of metal sulphides with a lixiviant containing ferric chloride, cupric chloride and chlorine precipitating from, the resulting leach solution cuprous chloride with gaseous butadiene, separating and decomposing the formed addition. compound of cuprous chloride and butadiene to recover the cuprous chloride, oxidizing and hydrolyzing the cuprous chloride to precipitate cupric oxychloride, converting the cupric oxychloride to cupric …
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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 9, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 9, 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.