Electrochemical and leaching studies to better understand the role of ethylene glycol in the oxidative acid dissolution of chalcopyrite

Ruiz-Sánchez, A.; Lapidus, G.T.

doi:10.1016/j.electacta.2022.140343

Cited by 4 publications

(3 citation statements)

References 39 publications

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“…Recently, non-polar organic solvents have been employed to enhance the efficiency of chalcopyrite leaching [21,22]. Ethylene glycol has demonstrated its prowess as an exceptional medium for this objective, as it prevented the formation of a passivation layer on the mineral's surface, thereby guaranteeing an almost complete retrieval of copper into the solution [23][24][25][26][27][28][29][30][31][32]. Solis-Marcial and co-workers conducted experiments using alcoholic acid media-specifically, isopropanol and methanol-for the purpose of acidically leaching copper from chalcopyrite [33,34].…”

Section: Introductionmentioning

confidence: 99%

Efficient Copper Recovery from Chalcopyrite Using an «Isopropanol–Sulfuric Acid–Sodium Dodecyl Sulfate» System

Kenzhaliyev,

Ketegenov,

Kamunur

et al. 2023

Minerals

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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.

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Section: Introductionmentioning

confidence: 99%

Efficient Copper Recovery from Chalcopyrite Using an «Isopropanol–Sulfuric Acid–Sodium Dodecyl Sulfate» System

Kenzhaliyev,

Ketegenov,

Kamunur

et al. 2023

Minerals

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“…Some of the reported solvometallurgical processes for the recovery/separation of Cu from various resources are summarized in Table 1 [6,[11][12][13][14][15][16][17][18]. The Cu leaching efficiency from chalcopyrite ore has been enhanced by using ethylene glycol as the polar solvent in a lixiviant containing sulfuric acid (H 2 SO 4 ) and hydrogen peroxide (H 2 O 2 ) as an oxidant [15][16][17]. The dissolution kinetics in the presence of ethylene glycol have been elucidated by using the reaction-controlled shrinking particle model [16].…”

Section: Introductionmentioning

confidence: 99%

“…The dissolution kinetics in the presence of ethylene glycol have been elucidated by using the reaction-controlled shrinking particle model [16]. The role of ethylene glycol in the solvoleaching of Cu and improving chalcopyrite ore dissolution could be due to a decrease in interfacial tension [17]. When ethylene glycol was used in place of water in leaching of metals (Co, Ni and Cu), the conversion from Co(H 2 O) 6 2+ to CoCl 4 2− was preferred to an aqueous solution due to a decrease in water activity.…”

Section: Introductionmentioning

confidence: 99%

Separation and Recovery of Cu from Industrial Dust via a Solvometallurgical Process

Sun

Kim

Seo

et al. 2022

Metals

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In this study, a solvometallurgical process for the recovery of Cu from industrial dust by leaching with a lixiviant comprising hydrochloric acid (HCl) and ethylene glycol followed by extraction with trioctylphosphine oxide (TOPO) was developed. Copper, Ni, Mg, and Al contained in the dust were efficiently dissolved by using HCl in ethylene glycol, leaving most of the Ag in the residue. The parameters (concentration of the lixivant, reaction temperature, pulp density) that affect leaching efficiency were extensively investigated and optimized. TOPO was used to selectively extract Cu over other metal ions (Ni, Mg, Al, and Ag) from the obtained leachate. The Cu extraction mechanism was investigated by using the slope method, and 0.1 mol/L sulfuric acid was used to strip Cu from the Cu-loaded TOPO. McCabe–Thiele plots for Cu extraction and stripping were constructed to determine the number of counter-current stages along with the volumetric flow ratio of the two phases. Counter-current Cu extraction and stripping simulation tests were carried out to confirm its feasibility. Finally, a flow diagram of the proposed process for separation and recovery of Cu from industrial dust is provided.

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Leaching and Kinetic Study of Chalcopyrite Without Acid in an O2–H2O System

Miao

Leng

Han

2023

J. Sustain. Metall.

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Electrochemical and leaching studies to better understand the role of ethylene glycol in the oxidative acid dissolution of chalcopyrite

Cited by 4 publications

References 39 publications

Efficient Copper Recovery from Chalcopyrite Using an «Isopropanol–Sulfuric Acid–Sodium Dodecyl Sulfate» System

Efficient Copper Recovery from Chalcopyrite Using an «Isopropanol–Sulfuric Acid–Sodium Dodecyl Sulfate» System

Separation and Recovery of Cu from Industrial Dust via a Solvometallurgical Process

Leaching and Kinetic Study of Chalcopyrite Without Acid in an O2–H2O System

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