The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 1985
Filed:
Jul. 05, 1984
Einar Andersen, Kr-sand, NO;
Gunnar H Boe, Kr-sand, NO;
Elkem a/s, Oslo, NO;
Abstract
Copper content in sulphide-containing materials such as ores or concentrates is extracted by leaching the material by means of a leaching solution containing iron (III) chloride and copper (II) chloride, the leaching process being regulated in order to keep the red-ox potential in the leach solution between 430 mV and 460 mV, whereby iron (III) chloride is reduced to iron (II) chloride while copper (II) chloride is kept in the bivalent state. The copper content in the ore or concentrate is thereby leached as copper (II) chloride. Copper (II) chloride is thereafter extracted from the pregnant leach solution by contacting the solution with an organic complex-ion forming extractant which extraction properties are dependent on the chloride concentration.