Solvent extraction of copper from sulfate-chloride solutions using mixed and modified hydroxyoxime extractants

Ruiz, M.C.; Risso, J.; Seguel, Juan; Padilla, R.

doi:10.1016/j.mineng.2019.106109

Cited by 32 publications

(12 citation statements)

References 7 publications

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“…Finally, Cu(II) and Fe(III) cations cannot be extracted by carboxylic acids like

HBA

at low pH values. Instead, these ions are extracted by oximes such as LIX984N, 39,40 or Aliquat 336 could be used for the extraction of Fe(III) from hydrochloric acid media 41 . However, reasonable extraction percentages are obtained at very high acid concentrations (6–10 mol L −1 ) because iron is extracted as

FeC l_{4}

form.…”

Section: Resultsmentioning

confidence: 99%

Rhenium(VII) extraction from sulfuric aqueous solutions using ionic liquids as diluent and extractant: insights on the extraction stoichiometry and process parameters

Quijada‐Maldonado

Román

Merlet

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Rhenium(Re) is a highly valuable metal recovered from molybdenite leach liquors by solvent extraction (SX) using toxic organic solvents. This work proposes an extracting phase free of volatile organics composed by the ionic liquid (IL) trioctylmethylammonium benzoate [TOMA][BA] as the extractant, due to its ability to extract Re(VII), and the IL 1‐octyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide [omim][Tf2N] as the diluent, due to its high hydrophobicity where the extraction stoichiometry and process parameters such as the initial pH, the extractant concentration in the diluent and stripping using ammonium hydroxide (boldNH4boldOH) and sodium hydroxide (boldNaOH) were assessed. RESULTS This extracting phase yielded high extraction percentages: 95% with only 3% (v/v) of [TOMA][BA] in [omim][Tf2N]. A detailed study of the SX stoichiometry was carried out through slope analysis, showing that the SX occurs in two steps: first, the extraction of acid; then, the extraction of the metal ion via anion exchange with the transfer of IL‐diluent anion to the aqueous phase. Additionally, the extracting phase was tested in a synthetic molybdenite leached pregnant leach solution, showing selectivity towards Re(VII) over Cu(II) and Fe(III) at very low extractant concentration. The stripping of Re(VII) from the loaded phase was also studied achieving 60% stripping in only one equilibrium step when using boldNH4boldOH. CONCLUSION This novel extracting phase, free of volatile organic, shows promising Re(VII) extraction for future industrial applications. © 2021 Society of Chemical Industry (SCI).

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“…Finally, Cu(II) and Fe(III) cations cannot be extracted by carboxylic acids like

HBA

FeC l_{4}

form.…”

Section: Resultsmentioning

confidence: 99%

Rhenium(VII) extraction from sulfuric aqueous solutions using ionic liquids as diluent and extractant: insights on the extraction stoichiometry and process parameters

Quijada‐Maldonado

Román

Merlet

et al. 2022

J of Chemical Tech & Biotech

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“…SX is a large-scale technique that has been used in the copper industry since the 1970s. However, it has had several challenges over the years, such as the addition of high concentrations of chloride ions [6,7], presence of nitrate ions [8], increased impurities [9], organic phase degradation, and reuse of wastewaters and brines [10][11][12][13][14][15][16][17][18]. Nevertheless, despite time's passage, hydroxyoxime has adapted and remained with minimal modifications in its chemical composition (mainly by adjusting mixtures between aldoximes and ketoximes).…”

Section: Introductionmentioning

confidence: 99%

Solvent Extraction of Metal Ions from Synthetic Copper Leaching Solution Using R4NCy

Sepúlveda

Toro

Hernández

et al. 2022

Metals

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Recent works suggest that the use of ionic liquids in the copper solvent extraction industry is feasible. However, the reports did not use real solutions (or synthetic solutions with various elements). This fact remains poorly established, and the interaction efficiencies are still under study. The objective of this research is to explore the extraction and stripping of the four major elements present in a copper industrial pregnant leach solution (Cu(II), Fe(III), Mn(II), and Zn(II)) using the methyltrioctyl/decylammonium bis(2,4,4-trimethylpentyl)phosphinate (R4NCy) ionic liquid as an extractant. The work conditions studied in extraction were ionic liquid concentration, initial pH, and O/A ratio, and in stripping were H2SO4 concentration and O/A ratio. The test was carried out at room temperature and ambient pressure. High efficiency and selectivity (99.82% and 113,755 over Cu(II), respectively) were observed for Fe(III) extraction over the other elements. Moreover, after the extraction test, significant difficulty in stripping Fe(III) loaded in the ionic liquid was observed (28.7% at 0.5 M of H2SO4). Finally, the present study demonstrates that the R4NCy ionic liquid is not suitable for copper extraction because it has a higher selectivity for Fe(III) and Zn(II).

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“…g. LIX 84 and LIX d973N were used to recover and purify Cu (II) from sulfate solutions. Also, several published papers have been stated the selective extraction of Cu (II) from aqueous solutions using different types of LIX extractants at other conditions [7][8][9][10][11] . Also, was successfully used the Schiff base 4-(4'chlorobenzylideneimino)-3-methyl-5-mercapto-1, 2, 4-triazole for separating and determination of Cu (II) from acetate buffer solution at pH 4.2, where Cu (II) complex with the ligand is instantly extracted into chloroform and shows maximum absorbance at λmax 414nm which remains stable for >48h 12 .…”

Section: Introductionmentioning

confidence: 99%

“…Card No.,11-78]3 . There are no actual minerals recorded for Cd, which presented as adsorbed on Zn minerals.…”

mentioning

confidence: 99%

Liquid-liquid separation of Cd (II) from Cu-sulfide cake prepared from sulfate solution of Abu-Thor ore material, Southwestern, Sinai, Egypt

Awny

2021

Mediterr.J.Chem.,

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The present work is concerned with the subsequent liquid-liquid separation of Cu, Zn, and Cd compounds from Cu- sulfide cake prepared from the sulfate solution of Abu-Thor Gibbsite-bearing shale ore material. This ore was found assaying 0.014% of Cd, 0.5% of Cu, and 0.55% of Zn as the elements of interest, by using 25% of H2SO4 solution at a solid/liquid ratio of 1/3 reaction time of 90 min at a temperature of 80 ◦C. About 96.5% of Cu (II), 99.3% of Cd (II), and 95.6% of Zn (II), respectively, were dissolved. After filtration, the prepared sulfate solution was treated with a suitable weight of Na2S to prepare the working Cu-sulfide cake, which was then wholly re-dissolved in 10% of H2SO4 solution to prepare the working sulfate solution, which contained the elements of interest. This solution was gone out to the organic solvent process for complete separating between the Cu (II), Zn (II) ions in the organic phase, and Cd (II) ions in the aqueous phase. The effective extraction parameters such as pH value, LIX concentration, contact time, and organic/aqueous ratio were studied. The obtained data cleared that the pH value of 2.5 was found effective for separating Cd (II) in the aqueous phase and both Zn (II) and Cu (II) in the organic phase. Where Cd (II) ions were precipitated as CdS using Na2S solution at pH 0.89, on the other side, both Zn (II) and Cu (II) were completely separated in the stripping process using Na2CO3 solution.

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Solvent extraction of copper from sulfate-chloride solutions using mixed and modified hydroxyoxime extractants

Cited by 32 publications

References 7 publications

Rhenium(VII) extraction from sulfuric aqueous solutions using ionic liquids as diluent and extractant: insights on the extraction stoichiometry and process parameters

Rhenium(VII) extraction from sulfuric aqueous solutions using ionic liquids as diluent and extractant: insights on the extraction stoichiometry and process parameters

Solvent Extraction of Metal Ions from Synthetic Copper Leaching Solution Using R4NCy

Liquid-liquid separation of Cd (II) from Cu-sulfide cake prepared from sulfate solution of Abu-Thor ore material, Southwestern, Sinai, Egypt

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