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A D2EHPA and TBP mixed solvent system diluted with kerosene were used for the selective extraction of vanadium(IV) from iron(II) from an acidic stone coal leach solution that was reduced using sodium sulfite. Extraction studies were carried out under different pH and solvent concentrations, and optimized conditions were determined. The loaded organic was stripped with sulfuric acid. The number of...
The leaching of a sphalerite concentrate with high indium and iron content in sulfuric acid–oxygen media has been studied in the present paper. The variables considered in the study were particle size, concentration of sulfuric acid, partial pressure of oxygen, leaching temperature, and leaching time. The experimental data indicated that under the conditions employed up to 99% zinc and 90% indium...
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