Process for recovering gold
AssigneeOutotec (Finland) Oy
InventorsMari LUNDSTRÖM, John O'CALLAGHAN, Timo HAAKANA, Riina AHTIAINEN, Janne KARONEN
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AssigneeOutotec (Finland) Oy
InventorsMari LUNDSTRÖM, John O'CALLAGHAN, Timo HAAKANA, Riina AHTIAINEN, Janne KARONEN
Estimating the term…
Provided is a process for recovery of gold from gold-bearing raw materials comprising (a) leaching said gold-bearing raw material in a chloride containing leaching solution containing a total concentration of less than 120 g/L of halide ions, whereby the total concentration of chloride ions is less than 120 g/L of to dissolve gold and to obtain a leach solution comprising gold in solution; and simultaneously contacting the leach solution comprising gold in solution with a re-sorptive material to obtain a leach solution comprising gold-bearing re-sorptive material; and (b) recovering gold and optionally silver from the said gold-bearing re-sorptive material.
1-21. (canceled)
A process for recovery of gold from gold-bearing raw materials comprising (a) leaching said gold-bearing raw material in a chloride containing leaching solution comprising a total concentration of 1 to 35 g/L of halide ions, whereby the total concentration of chloride ions is from 1 to 35 g/L , to dissolve gold and to obtain a leach solution comprising gold in solution, wherein the oxidation-reduction potential of the leaching solution in the leaching step (a) is at least 400 mV vs. Ag/AgCl;
Dependencies are inferred from the claim text.