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