Structural effect of diamide extractants on the extraction behaviour of Fe(III) from hydrochloric acid

Cai, Xucan; Han, Jixun; Pang, Maoping; Cui, Yu; Li, Yexin; Sun, Guoxin

doi:10.1016/j.hydromet.2016.05.009

Cited by 12 publications

(3 citation statements)

References 28 publications

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“…This phenomenon is similar to the extraction of Fe(III) by TBDGA in toluene from hydrochloric acid medium. 31 DMDDdDGA has a higher extraction ability toward Fe(III) than DBDDdDGA, which may be attributed to the alkyl steric hindrance. It is noteworthy that the distribution ratios of Pr(III) for both extractants were nearly zero under the studied concentrations of hydrochloric acid.…”

Section: Separation Of Fe(iii) From Pr(iii)mentioning

confidence: 95%

Effect of structure on extraction behavior of praseodymium with a series of unsymmetrical diglycolamides from hydrochloric acid

et al. 2018

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The extraction behavior of Pr(III) has been investigated using four kinds of unsymmetrical diglycolamide (DGA) extractants having different alkyl chain lengths, namely N,The effect of the alkyl chain of amidic N atoms in DGAs on the extraction ability of Pr(III) is discussed. The extraction of hydrochloric acid and Pr(III) from hydrochloric acid medium by DGAs in sulfonated kerosene, toluene and octanol was studied. The effect of extractant concentration and diluents on the distribution ratio (D) of Pr(III) was investigated to understand the extraction mechanism. Pr(III) and Fe(III) can be separated very well by DMDDdDGA and DBDDdDGA diluted by toluene in hydrochloric acid solution. IR spectra of extracted species of DGA-HCl and DGA-Pr(III) were recorded to study the structure of the extracted species.

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Section: Separation Of Fe(iii) From Pr(iii)mentioning

confidence: 95%

Effect of structure on extraction behavior of praseodymium with a series of unsymmetrical diglycolamides from hydrochloric acid

et al. 2018

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“…24 The DOA as HBA via forming HDESs to recover citric acid from the fermentation broth was developed. 25 On the other hand, Cai et al pointed out that diamide had a strong ability to extract Fe(III) in the HCl solution, 26 and Allal et al used DEO to extract titanium from chloride media. 27 As a result, we were very interested in whether DOA could be treated as a HBA and DEO as a HBD to prepare HDES to recover titanium from ilmenite HCl leachate using an improved and more sustainable process.…”

Section: ■ Introductionmentioning

confidence: 99%

Recovery of Titanium from Ilmenite HCl Leachate Using a Hydrophobic Deep Eutectic Solvent

Zhu

Wei

et al. 2022

ACS Sustainable Chem. Eng.

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Currently, it is difficult to obtain high-purity titanium from ilmenite to produce titanium dioxide (TiO2). More severely, it causes serious environmental pollution. In this paper, a new hydrophobic deep eutectic solvent (HDES), a combination of decanol (DEO) as a hydrogen bond donor (HBD) with N,N-diisooctylacetamide (DOA) as a hydrogen bond acceptor (HBA), for the environmentally friendly recovery of Ti(IV) from ilmenite HCl leachate is proposed. The prepared HDES had low water cross-contamination, low viscosity, and sufficient density difference of HDES–water. The formation mechanism of HDES had been thoroughly revealed. In the ilmenite HCl leachate, the extraction effect of HDES on all metal ions had been studied in detail. Finally, rutile TiO2 and Fe2O3 were successfully synthesized using the obtained solutions as raw materials. The extraction mechanism characterized by Fourier transform infrared and 1H NMR spectroscopy was consistent with that determined by density functional theory (DFT) calculations. The slope method was used to study the effects of HBD, HBA, H+, Cl–, and H2O on the extraction of metal ions by HDES. In addition, the complex structures of HDES formed in the HCl solution are given. This article may thus help improve the sustainable utilization of some related metal ions from the real ore.

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“…Cui et al [16,17] studied the extraction of iron(III) from HCl by extractants N,N,N′,N′tetrabutylmalonamide (TBMA) and N,N,N′,N′-tetrabutyl-3β-hydroxyglutaramide (TBDGA). The extraction results were compared with those of N,N,N′,N′tetrabutylsuccinamide (TBSA) to understand the relationship between the chemical structure of the extractants and the iron(III) extraction degree.…”

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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Structural effect of diamide extractants on the extraction behaviour of Fe(III) from hydrochloric acid

Cited by 12 publications

References 28 publications

Effect of structure on extraction behavior of praseodymium with a series of unsymmetrical diglycolamides from hydrochloric acid

Effect of structure on extraction behavior of praseodymium with a series of unsymmetrical diglycolamides from hydrochloric acid

Recovery of Titanium from Ilmenite HCl Leachate Using a Hydrophobic Deep Eutectic Solvent

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

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