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https://hdl.handle.net/20.500.13091/4038
Title: | Investigation of The Effect of Some Polar Organic Solvents on The Leaching And Dissolution Kinetics of Chalcopyrite In Hydrogen Peroxide and Sulfuric Acid Solution | Authors: | Abdelraheem, Mohamed Taha Osman Ağaçayak, Tevfik |
Keywords: | Hydrogen peroxide Sulfuric acid Activation energy Leaching Chalcopyrite Ferric Sulfate Copper Concentrate Passivation Extraction |
Publisher: | Chem Soc Ethiopia | Abstract: | The effect of acetic acid and ethanol as polar aqueous solvents on sulfuric acid with hydrogen peroxide as an oxidant was studied. A small amount of these polar aqueous solvents significantly improved the copper leaching recovery. The leaching parameters such as temperature, stirring speed, H2O2 concentration, solid/liquid ratio, H2SO4concentration and particle size were examined. About 76.33% as highest Cu extraction was gained with 2 M H2O2, 600 rpm stirring speed, 50 degrees C temperature, 1 M H2SO4, 240 min of the reaction and 75 x 53 mu m particle size fraction. Further experimental tests were carried out when the stirring speed, solid-to-liquid ratio (S/L), particle size, H2O2concentration, temperature and H2SO4concentration were kept constant to investigate the effect of ethanol and acetic acid concentration in the range of 0-2 M. The experimental results proved that the copper extraction recovery reached to 99.03% in 180 min of the reaction with 2 M acetic acid. While 2 M of ethanol increased copper extraction recovery up to 100% in 90 min of the leaching time. The dissolution reaction found to be described by mixed kinetic model and activation energy of 54.37 kJ/mol. Addition of acetic acid and ethanol suggested reaction controlled by diffusion across product layer. | URI: | https://doi.org/10.4314/bcse.v37i3.19 https://hdl.handle.net/20.500.13091/4038 |
ISSN: | 1011-3924 1726-801X |
Appears in Collections: | Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections |
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