Process for producing enriched mineral ore concentrates
CA 1258181 A · Owner: Atlantic Richfield Company · Inventors: Willson, Donald B.; Yuill, William A.; Armstrong, Raynor O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for selectively enriching a sulfide mineral ore concentrate containing desired metal sulfides and mixed metal sulfides containing the desired metal and other metal or other metal sulfides, the other metal having a lower affinity for sulfur than the desired metal to produce an enriched concentrate having an increased desired metal content; the process comprising:, (a) reacting a desired metal ion rich aqueous stream with the sulfide mineral ore concentrate in a reaction zone to produce a product aqueous slurry containing increased quantities of desired metal sulfides;, (b) separating the product aqueous slurry into a desired metal ion depleted aqueous stream and a finely divided …
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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 8, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 8, 2006.
- 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.