Efficient Copper Recovery from Chalcopyrite Using an «Isopropanol–Sulfuric Acid–Sodium Dodecyl Sulfate» System
Kenzhaliyev B. Ketegenov T. Kamunur K. Batkal A. Nadirov R.
October 2023Multidisciplinary Digital Publishing Institute (MDPI)
Minerals
2023#13Issue 10
In this study, SDS is used to enhance the sulfuric acid leaching of chalcopyrite in aqueous and isopropanol media. The presence of SDS increased copper extraction into the solution in both solvents. However, it was the “isopropanol–sulfuric acid–SDS” system that proved to be particularly effective for copper recovery from chalcopyrite. The positive effect of SDS can be attributed to the reduction in the solution’s surface tension and the enhancement of mineral wetting. Additionally, the presence of SDS as a surfactant induces changes in the adsorption patterns of formed sulfur species on the mineral surface. SDS competes with sulfur for occupancy on the surface binding sites. This competitive interaction has the potential to diminish the formation of a substantial sulfur layer on the mineral surface. Under optimal conditions (isopropanol media, 2 M H2SO4, 65 °C, 120 min, 0.6 g/L SDS), copper recovery into the solution was 83%, and this is a considerable achievement for chalcopyrite leaching at ambient pressure in the absence of strong oxidizers.
chalcopyrite , copper leaching , isopropanol , sodium dodecyl sulfate
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Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty, 050010, Kazakhstan
Institute of Combustion Problems, Almaty, 050012, Kazakhstan
Department of General and Inorganic Chemistry, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Institute of Metallurgy and Ore Beneficiation JSC
Institute of Combustion Problems
Department of General and Inorganic Chemistry
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