Iron(III) extraction by LIX 860 and its influence on copper(II) extraction from sulphuric solutions

Simpson, Jaime; Navarro, Patricio; Alguacil, Francisco José

doi:10.1016/0304-386x(95)00078-u

Cited by 34 publications

(16 citation statements)

References 6 publications

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“…In this sense, several models have been proposed for the speciation of the phosphoric acid at high concentrations. Elmore et al [45] proposed the species H 3 PO 4 , H 2 PO 4 2 , H 6 P 2 O 8 and H 5 P 2 O 8 2 in basis of experimental measurements of pH, vapor pressure and conductance of phosphoric acid solutions. Stenström et al [46] have reproduced Elmore's model using the theory of Bromley [47] for the calculation of activity coefficients.…”

Section: Calculation Of the Conditional Extraction Constantsmentioning

confidence: 99%

Copper(II) Extraction from Phosphoric Acid Media by 5‐Dodecylsalicylaldoxime (LIX 622)

Ocio

Elizalde

2006

Solvent Extraction and Ion Exchange

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The extraction of Cu(II) from phosphoric acid media (0.4 -7.3 M) by the commercial reagent LIX 622 in toluene has been studied. Experimental results have been treated numerically and the formation in the organic phase of the complex CuR 2 , HR being 5-dodecylsalicylaldoxime, has been proposed. Values of the conditional extraction constants, which increase with the phosphoric acid concentration, are given. Organic extracts have been analyzed by EPR spectroscopy. The presence of a square planar complex of Cu(II) has been deduced confirming the stoichiometry CuR 2 .

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Section: Calculation Of the Conditional Extraction Constantsmentioning

confidence: 99%

Copper(II) Extraction from Phosphoric Acid Media by 5‐Dodecylsalicylaldoxime (LIX 622)

Ocio

Elizalde

2006

Solvent Extraction and Ion Exchange

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“…Depending on the extracting selectivity, one of the metal cations is extracted selectively over others. The extraction of iron (III) in the range of low aqueous iron concentrations with hydroxyoxime extractants has been studied and reported in the literature (Aminian and Bazin, 2000;Ocaña and Alguacil, 1998;Parus et al, 2011;Simpson et al, 1996;Zhang et al, 2016). However, the data on extraction in a wide range of conditions, especially in the range of high aqueous iron (III) concentrations, remain insufficient.…”

Section: Introductionmentioning

confidence: 99%

“…However, the data on extraction in a wide range of conditions, especially in the range of high aqueous iron (III) concentrations, remain insufficient. Agarwal et al (2012), Aminian and Bazin (2000), Ocaña and Alguacil (1998), and Simpson et al (1996) studied the effect of the presence of iron (III) in the aqueous solution on the extraction of copper, when copper was extracted preferably. Iron (III) was found to have a minor effect on copper extraction.…”

Section: Introductionmentioning

confidence: 99%

Modeling the liquid–liquid extraction equilibrium of iron (III) with hydroxyoxime extractant and equilibrium-based simulation of counter-current copper extraction circuits

Vasilyev

Virolainen

Sainio

2018

Chemical Engineering Science

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The phase equilibrium in the loading and stripping stages of the liquid-liquid extraction of iron (III) with hydroxyoxime extractant in kerosene was studied over a wide range of hydroxyoxime extractant (Acorga M5640, 3-25 vol-%) and iron (1.5-45 g/L) concentrations. A mechanistic mathematical model explaining the phase equilibrium in the loading stage was developed and validated with new experimental data. The model accounts for the non-ideality of both the aqueous and the organic phases. The composition of the aqueous sulfate solution was calculated through speciation of the electrolytes with an extended Debye-Hückel model. The organic phase non-ideality in the loading stage was described with an empirical correlation that accounts for the effect of extractant concentration on the extraction equilibrium constant. The model parameters were fitted against measured experimental data using nonlinear regression analysis. A mechanistic mathematical model explaining the co-extraction of iron in copper liquid-liquid extraction was developed and validated using D-optimal experiment design and the Markov chain Monte Carlo algorithm. The model facilitates the optimization of copper liquid-liquid extraction circuits, as iron is the most common impurity in industrial systems, making process operations challenging.

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“…Thus far, many extractants have been developed with high selectivity and a high extraction rate. [1][2][3][4][5] In recent years, however, since the sensational finding of organic compounds, such as endocrine disruptors, we can not also help wondering about the solvent-extraction reagents produced by the petrochemical industry. We have an idea for work from these points of view, such as to make use of a natural compound for a synthetic compound as an extractant.…”

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confidence: 99%

Selective Extraction of Palladium(II) with Theophylline Derivatives

Kaikake¹,

Baba²

2001

ANAL. SCI.

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Iron(III) extraction by LIX 860 and its influence on copper(II) extraction from sulphuric solutions

Cited by 34 publications

References 6 publications

Copper(II) Extraction from Phosphoric Acid Media by 5‐Dodecylsalicylaldoxime (LIX 622)

Copper(II) Extraction from Phosphoric Acid Media by 5‐Dodecylsalicylaldoxime (LIX 622)

Modeling the liquid–liquid extraction equilibrium of iron (III) with hydroxyoxime extractant and equilibrium-based simulation of counter-current copper extraction circuits

Selective Extraction of Palladium(II) with Theophylline Derivatives

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