Recovery of silver, copper and zinc from partially roasted pyrite concentrate by ferric sulphate leaching
CA 1107973 A · Owner: Texasgulf Inc. · Inventors: Bocckino, Harry G.; Pepper, Terry W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for treating a pyrite concentrate containing silver, copper and zinc to recover the metals contained therein is disclosed. The process includes the partial roasting of the concentrate to pen the pyrite matrix to solution penetration followed by hydrometallurgical steps, including ferric sulphate leaching reduction leaching, solid-liquid seperation and metal extraction steps, to recover the copper and zinc separately and silver in concentrated form.
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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 September 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 1998.
- 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.