Method for separating and recovering nickel and copper from complex materials
CA 1183689 A · Owner: Boliden Aktiebolag · Inventors: Mioen, Thomas K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of recovering copper and nickel from sulphidic minerals containing copper, nickel and iron comprises the steps of roasting the mineral, preferably to provide magnetite; sulphating for example, with sulphuric acid, sulphur trioxide metal sulphate and/or sulphur, dioxide together with oxygen; and a subsequent leaching of the sulphated material and recovery of copper from the leaching solution for example by electrolysis. All or part of the leaching solution with its nickel content is recycled to the roasting stage and the, nickel content is removed in the form of nickel oxide together with the leaching residue, from which nickel can be recovered.
Read the whole patent
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 March 12, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 12, 2002.
- 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.