Purification of Gold from Chloride Leach Liquor of Copper Anode Slime by Octanol-Kerosene Organic Extractant

Sadeghi, N.; Keshavarz Alamdari, E.

doi:10.18869/acadpub.jame.34.2.71

Purification of Gold from Chloride Leach Liquor of Copper Anode Slime by Octanol-Kerosene Organic Extractant

Authors

N. Sadeghi

E. Keshavarz Alamdari

Amirkabir University of Technology, Tehran, Iran

10.18869/acadpub.jame.34.2.71

Abstract

In the present study, the copper anode slime was leached in chloride media. Then, pregnant leach solution (PLS) was purified using solvent extraction method and Octanol-kerosene solution. HAuCl4.2L was determined as the extracted macromolecule, and separation of impurities, such as copper, iron and selenium was done in the presence of gold. McCabe-Thiele diagram of Au–HCl (3 M)– Octanol (40% v/v) in O/A=3/4 showed that Au concentration in aqueous phase decreased from the initial value of 200 to 7 mg/L, after 5 stages. Ammonia solution was proposed as the stripper and McCabe-Thiele diagram was presented to obtain the number of gold stripping steps by ammonia solution

Keywords

Solvent extraction

Gold

Chloride solution

Copper anode slime

Octanol

Stripping