Recovery of precious metals and copper from copper/gold ores using resin technology
OwnerAlexander E. Jenkins, Tam Traninventors
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Abstract
A process for the selective recovery of precious metals from a medium loaded with precious metals and base metals. The selective recovery of precious metals is achieved by exposing the medium to an aqueous solution containing a complex of formula MX2—, wherein M is a metal of group IB or IIB of the Periodic Table of Elements, and X is a monovalent radical. A second invention relates to the removal of copper from the medium whereby elution of copper is achieved by exposing the medium to an aqueous solution capable of oxidising Cu(I) to Cu(II) whilst not eluting precious metals from the medium.
Claims27
A process for the selective recovery of precious metals from a medium loaded with precious metals and base metals, wherein said selective recovery is achieved by exposing said medium to an aqueous solution containing a complex of formula MX2—, wherein M is a metal of group IB or IIB of the Periodic Table of Elements, and X is a monovalent radical.
11 The process of claim 10, wherein said complex anion of formula MX2— is Cu(CN)2—.
A process for the elution of copper from a medium loaded with precious metals, copper and optionally other base metals, wherein said elution is achieved by exposing said medium to an aqueous solution capable of oxidising Cu(I) to Cu(II), whilst not eluting said precious metals from said medium.
Dependencies are inferred from the claim text.