Recovery of nitric acid soluble transition metals from sulfur and iron containing ores of the same
CA 1066062 A · Owner: International Ore Technology · Inventors: Posel, John G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a method of recovering one or more metal values of the group consisting of copper silver, nickel, cobalt ant zinc, from a sulfur an iron containing ore of the metal or metals. The method consists of intermixing the ore and at least a stoichiometric amount of nitric acid of about 30-50% by volume concentration to form an aqueous acid leach solution of the same. The solution is heated to a temperature at or above the melting point of sulfur while the solution is contained under pressure in a relatively inert atmosphere. The temperature of the solution is controlled to substantially solubilize the sulfur and the metal value or values in the acid soluble phase of 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 November 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 13, 1996.
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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.