The gold contained in {HEAD ~ the residue} or intermediate product is leached using bivalent copper and oxygen in copper chloride sodium chloride solution in the conditions, where the oxidation reduction potential is {TAIL ~ a maximum} of 650 mV and the pH at least 1 
The gold contained in { HEAD ~ the residue } or intermediate product is leached using bivalent copper and oxygen in copper chloride sodium chloride solution in the conditions , where the oxidation reduction potential is { TAIL ~ a maximum } of 650 mV and the pH at least 1
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH