Leaching of chalcopyrite with hydrogen peroxide in 1-hexyl-3-methyl-imidazolium hydrogen sulfate ionic liquid aqueous solution

Hu, Junxian; Tian, Guocai; Zi, Futing; Hu, Xianzhi

doi:10.1016/j.hydromet.2016.12.001

Cited by 34 publications

(17 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A similar result was obtained by Hu et al [50], who confirmed that the copper dissolution increased slowly with increasing stirring speed up to 200 rpm, after which it does not change.…”

Section: Effect Of Stirring Speedsupporting

confidence: 88%

“…As can be seen from Figure 3, with decreasing particle size, copper extraction under the same conditions increases. The similar results were obtained by other authors [40,46,50]. The contact surface between oxidant and chalcopyrite increases, for smaller particles compared to large ones, significantly improving copper extraction; thus, particles with size −37 µm was used for testing other parameters.…”

Section: Effect Of Particle Sizesupporting

confidence: 87%

“…The process of copper leaching from chalcopyrite concentrate with H 2 SO 4 + H 2 O 2 solution is a complex heterogeneous process. The kinetic model applied for linearization of the experimental results was selected based on Sharp's method, including the reduced reaction half time [19,50,58,59]. The reduced reaction half time is given in Equation 4:…”

Section: Leaching Kineticsmentioning

confidence: 99%

“…Adebayo et al [40] found that the dissolution kinetics follow a shrinking-core model, controlled by surface chemical reaction mechanism as the rate-determining step, and they have reported an activation energy value of 39 kJmol -1 . Hu et al [50] examined chalcopyrite leaching with hydrogen peroxide in 1-hexyl-3-methyl-imidazolium hydrogen sulfate solution and found that the process was chemically controlled with an activation energy of 52 kJ/mol and with the formation of sulfur as the main leaching product located near unleached chalcopyrite. Similar results with a chemically controlled mechanism, activation energy of 39.9 kJ/mol, and elemental sulfur in the residues were obtained by Ahn et al [49].…”

Section: Leaching Kineticsmentioning

confidence: 99%

“…Hydrogen peroxide was used as a relatively cheap and strong oxidizing agent, with a redox potential of +1.77 mV in the acidic medium [40]. The application of hydrogen peroxide for the leaching of chalcopyrite in sulfuric acid solution has previously been examined by several authors [40][41][42][43][44][45][46][47][48][49][50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid

Sokić

Marković

Stanković

et al. 2019

Metals

View full text Add to dashboard Cite

In ores, chalcopyrite is usually associated with other sulfide minerals, such as sphalerite, galena, and pyrite, in a dispersed form, with complex mineralogical structures. Concentrates obtained by flotation of such ores are unsuitable for pyrometallurgical processing owing to their poor quality and low metal recovery. This paper presents the leaching of chalcopyrite concentrate from the location “Rudnik, Serbia”. The samples from the flotation plant were treated with hydrogen peroxide in sulfuric acid. The influences of temperature, particle size, stirring speed, as well as the concentrations of hydrogen peroxide and sulfuric acid were followed and discussed. Hence, the main objective was to optimize the relevant conditions and to determine the reaction kinetics. It was remarked that the increase in temperature, hydrogen peroxide content, and sulfuric acid concentration, as well as the decrease in particle size and stirring speed, contribute to the dissolution of chalcopyrite. The dissolution kinetics follow a model controlled by diffusion, and the lixiviant diffusion controls the rate of reaction through the sulfur layer. Finally, the main characterization methods used to corroborate the obtained results were X-ray diffraction (XRD) as well as qualitative and quantitative light microscopy of the chalcopyrite concentrate samples and the leach residue.

show abstract

“…A similar result was obtained by Hu et al [50], who confirmed that the copper dissolution increased slowly with increasing stirring speed up to 200 rpm, after which it does not change.…”

Section: Effect Of Stirring Speedsupporting

confidence: 88%

Section: Effect Of Particle Sizesupporting

confidence: 87%

Section: Leaching Kineticsmentioning

confidence: 99%

Section: Leaching Kineticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid

Sokić

Marković

Stanković

et al. 2019

Metals

View full text Add to dashboard Cite

show abstract

Hydrometallurgical Processing ofE‐wasteand Metal Recovery

Botelho Junior,

Sultana,

Vaughan

2023

Management of Electronic Waste

View full text Add to dashboard Cite

Investigation of an alternative chemical agent to recover valuable metals from anode slime

Rüşen

Topçu

2018

Chem. Pap.

View full text Add to dashboard Cite

Anode slime (AS) including high content of precious metals is a by-product obtained after the electro-refining stage in copper production. In this study, it is aimed to recover Cu, Au, and Ag from the AS by using 1-butyl-3-methyl-imidazolium hydrogen sulphate ([Bmim]HSO 4) ionic liquid (IL) as a green solvent. The effects of IL concentration, temperature, reaction time and pulp density on recovery of valuable metals were statistically investigated. A high copper recovery of 87.52% was obtained under optimum condition as in 60% (v/v) [Bmim]HSO 4 at 50 °C after 2 h, pulp density at 40 g/L (1/25 solid/liquid ratio). Also, a remarkable gold recovery as 97.32% has been achieved in 80% (v/v) [Bmim]HSO 4 at 95 °C after 4 h, pulp density at 40 g/L. Temperature and IL concentration were detected as the most effective parameters for copper and gold recovery from AS, respectively. Silver could not be recovered from the AS due to the lower solubility in [Bmim]HSO 4 IL media. According to experimental results, [Bmim]HSO 4 could be offered as an alternative leaching agent, instead of conventional solvents, to recover valuable metals from copper anode slime.

show abstract

Leaching of chalcopyrite with hydrogen peroxide in 1-hexyl-3-methyl-imidazolium hydrogen sulfate ionic liquid aqueous solution

Cited by 34 publications

References 36 publications

Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid

Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid

Hydrometallurgical Processing ofE‐wasteand Metal Recovery

Investigation of an alternative chemical agent to recover valuable metals from anode slime

Contact Info

Product

Resources

About