Stoichiometry and structural studies of Fe(III) and Zn(II) solvent extraction using D2EHPA/TBP

Azizitorghabeh, Atefeh; Rashchi, Fereshteh; Babakhani, Ataollah

doi:10.1016/j.seppur.2016.07.037

Cited by 68 publications

(26 citation statements)

References 28 publications

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“…The peaks 1165 and 1026 cm −1 illustrate the P—O—C bend and P—O stretch of O=P—OH group, thus confirming the interactions between sunflower oil and D2EHPA (vide Table S8). 81,82 …”

Section: Resultsmentioning

confidence: 99%

Spectroscopic, thermodynamic and ultrasonic properties of pseudo‐binary mixtures of organic extractants and vegetable oil at 25–60°C under atmospheric pressure

Sarkar

Mondal

Beriya

et al. 2021

Asia-Pacific J Chem Eng

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This work is intended to investigate the molecular interactions and transport properties of five pseudo‐binary mixtures of various combinations of vegetable oils (sesame oil and sunflower oil) and organic extractants (Aliquat 336, TBP, D2EHPA and TOA) by determining their surface tension, density and viscosity over a temperature range of 25–60°C at atmospheric pressure. The experimental data are fitted into various literature models. Information on excess molar volume and viscosity deviation leads to an understanding of solute–solvent interactions. Further, the ultrasonic velocity, isentropic compressibility, intermolecular free length, specific impedance, apparent molar volume, volumetric thermal expansion coefficient, excess Gibbs' free energy, change in enthalpy of mixing and entropy of activation of the liquids have been calculated. A model relating the surface tension, density and viscosity of the pseudo‐binary mixtures has been proposed in this paper. Analysis of Fourier transform infrared (FTIR) studies has further illustrated the intermolecular interactions in the pseudo‐binary mixtures.

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Section: Resultsmentioning

confidence: 99%

Spectroscopic, thermodynamic and ultrasonic properties of pseudo‐binary mixtures of organic extractants and vegetable oil at 25–60°C under atmospheric pressure

Sarkar

Mondal

Beriya

et al. 2021

Asia-Pacific J Chem Eng

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“…To confirm the extraction mechanism, the composition of the extraction complex of aluminum with the P-15 extractant was measured via the slope method extensively adopted in literature [16,29,30]. In the reaction extraction of aluminum, L denotes the P-15 extractant, and then the equation of extraction reaction can be described as:…”

Section: Stoichiometry Of the Extraction Complexmentioning

confidence: 99%

Kinetics and Mechanism on Removal of Aluminum from Phosphoric Medium by Solvent Extraction using Lewis Cells

Yan¹,

Zhuang²,

Wang³

et al. 2021

SERDJ

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The kinetics of the forward extraction of aluminum ion had been investigated using Lewis cells. The influences of the aluminum concentration, temperature, and interfacial area were studied. The extracted species was demonstrated to be AlL 3 •(HL) 3 by stoichiometry studies and the mechanism of the extraction was explained. The results indicated that the extraction process was under mixed-control by the extraction reaction at the interface and the diffusion of the resultant in the organic phase. The activation energy was calculated to be 23.26 kJ/mol and was concordant with the mixed-control regime. Further analysis suggested that the reaction orders with respect to aluminum and extractant were 1 and 2, respectively, and the extraction rate constant was 10 −4.526 L 2 •g −2 •s −1 . The total rate of the extraction reaction for AlL 3 •(HL) 3 was given based on kinetic steps.

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“…There is also a possibility of iron(III) extraction by alkyl aryl ketones from both chloride and sulfate solutions [27]. To increase the extraction capacity and selectivity of extractants, it is possible to use mixtures of reagents based on TBP [28][29][30]: TBP and MIBK [31]. When using a mixture containing 70% TBP and 30% MIBK, the maximum extraction of iron(III) was observed.…”

Section: Introductionmentioning

confidence: 99%

Solvent Extraction of Iron(III) from Al Chloride Solution of Bauxite HCl Leaching by Mixture of Aliphatic Alcohol and Ketone

Sokolov

Valeev

Kasikov

2021

Metals

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Research into the solvent extraction of iron(III) from a chloride solution after bauxite HCl leaching by neutral oxygen-containing extractants and their mixtures were studied and the iron(III) extraction degree from chloride solutions using alcohols is presented. The effect of dilution of alcohol with a ketone by an extraction mixture in relation to its effectiveness was investigated. The iron(III) was efficiently extracted by the mixture of 1-octanol and 1-decanol (70%) with 2-undecanone (30%) from hydrochloric bauxite leach liquor at an O:A ratio = 2-4:1 at an iron(III) concentration of 7.4 g/L and 6 M HCl. For the removal of iron-containing organic phase from impurities (Al, Ca, Cr) that are co-extracted with iron(III), we used two step scrubbing at O:A = 5:1 by 7 M HCl as a scrub solution. The iron(III) stripping at the O:A ratio is shown. Using counter-current cascade of extractors, it was possible to obtain an FeCl3 solution with the iron(III) content of 90.5 g/L and total impurities less than 50 mg/L.

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Stoichiometry and structural studies of Fe(III) and Zn(II) solvent extraction using D2EHPA/TBP

Cited by 68 publications

References 28 publications

Spectroscopic, thermodynamic and ultrasonic properties of pseudo‐binary mixtures of organic extractants and vegetable oil at 25–60°C under atmospheric pressure

Spectroscopic, thermodynamic and ultrasonic properties of pseudo‐binary mixtures of organic extractants and vegetable oil at 25–60°C under atmospheric pressure

Kinetics and Mechanism on Removal of Aluminum from Phosphoric Medium by Solvent Extraction using Lewis Cells

Solvent Extraction of Iron(III) from Al Chloride Solution of Bauxite HCl Leaching by Mixture of Aliphatic Alcohol and Ketone

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