Kinetics of the alkaline stripping of vanadium(V) previously extracted by Aliquat® 336

Bal, Y.; Bal, Kheireddine; Cote, Gérard

doi:10.1016/s0892-6875(02)00044-4

Cited by 28 publications

(12 citation statements)

References 3 publications

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“…In fact, the application of nanoparticles coated by oleic acid in the solvent extraction technique is limited to hydrometallurgical systems that operate at a pH beyond 2. Some examples include the extraction and stripping of vanadium with Aliquat 336 [23], vanadium with LIX 63 [24], tungsten and molybdenum with Aliquat 336 [24], and boron with a mixture of Aliquat 336 and Cyanex 272 [25].…”

Section: Chemical Stability Of the Magnetic Fluidmentioning

confidence: 99%

Evaluation of magnetic nanoparticles coated by oleic acid applied to solvent extraction processes

Lobato

Ferreira

Mansur

2016

Separation and Purification Technology

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Section: Chemical Stability Of the Magnetic Fluidmentioning

confidence: 99%

Evaluation of magnetic nanoparticles coated by oleic acid applied to solvent extraction processes

Lobato

Ferreira

Mansur

2016

Separation and Purification Technology

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“…Although the suitability of Aliquat ® 336 for the extraction-based separation of V(V) has been already demonstrated [27,28], to the best of the author's knowledge the use of this extractant in polymer inclusion membranes for the extraction of V(V) has not been reported. In fact, there is just one published study of a PIM application for the separation of V(V) [29], which describes the potential of a PIM composed of poly(vinylidenefluorideco-hexafluoropropylene)…”

Section: Introductionmentioning

confidence: 99%

On the Potential of a Poly(Vinylidenefluoride-Co-hexafluoropropylene) Polymer Inclusion Membrane Containing Aliquat® 336 and Dibutyl Phthalate for V(V) Extraction from Sulfate Solutions

Bahrami¹,

Dolatyari²,

Shayani‐Jam³

et al. 2021

Preprint

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A polymer inclusion membrane (PIM) composed of 50 wt% poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) as its base polymer, 40 wt% Aliquat® 336 as its extractant and 10 wt% dibutyl phthalate (DBP) as plasticizer provided efficient extraction of vanadium(V) from its sulfate solutions adjusted to pH 2.5. It was suggested that V(V) was extracted as VO2SO4− via an anion exchange mechanism. Quantitative back-extraction was achieved in a sulfuric acid solution (6 mol L-1) containing 1 v/v% of hydrogen peroxide. It was assumed that the back-extraction process involved the oxidation of VO2+ to VO(O2)+ by hydrogen peroxide. The newly developed PIM with the optimized composition mentioned above exhibited excellent selectivity for V(V) in the presence of metallic species present in digests of spent alumina hydrodesulfurization catalysts (i.e., Al(III), Co(II), Cu(II), Fe(III), Mn(II), and Ni(II)). The co-extraction of Mo(VI) with V(V) was eliminated by its selective extraction at pH 1.1. The optimized PIM was characterized by contact angle measurements, atomic-force microscopy (AFM), energy dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TGA)/derivatives thermogravimetric analysis (DTGA), and the stress-strain measurements.

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“…A number of extractants have been investigated for the extraction of vanadium (IV) and vanadium (V) from their solutions, including acidic extractants such as di-(2-ethylhexyl) phosphoric acid (D2EHPA), 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester (EHEHPA), and bis(2,4,4-trimethylpentyl)-phosphinic acid (Cyanex272) [10]; basic extractants such as primary aliphatic amine Primene JM-T [11], trialkylamine (N235) [12,13], and methyltrialkyl ammonium chloride (N263) [14]; neutral extractants such as tri-n-butylphosphate (TBP) [15], trioctyl-phosphine oxide (TOPO) [16], and tri-n-octyl phosphine oxide (Cyanex 923) [17]; and chelating extractants like 5,8-diethyl-7-hydroxy-6-dodecanone oxime (LIX63) [18]. Among them, EHEHPA has been extensively studied for separating vanadium from other metal ions.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Highly Pure Vanadyl Sulfate from Sulfate Solutions Containing Impurities of Iron and Aluminum by Solvent Extraction Using EHEHPA

Chen

Zhang

et al. 2017

Metals

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Abstract:The preparation of highly pure vanadyl sulfate from sulfate solutions containing impurities of iron and aluminumwas investigated by solvent extraction with 2-ethylhexyl phosphoric acid mono-2-ethylhexyl ester (EHEHPA) and tri-n-butyl phosphate (TBP) as the phase modifier. The extraction and stripping conditions of vanadium (IV) and its separation from iron and aluminum were optimized. Under the optimal extraction conditions, the extraction of vanadium (IV) and iron were 68% and 53%, respectively, while only 2% aluminum was extracted in a single contact, suggesting good separation of vanadium (IV) from aluminum. Sulfuric acid solution was used for the stripping. Nearly 100% vanadium (IV) and 95% aluminum were stripped, while only 10% iron was stripped under the optimal stripping conditions in a single contact, suggesting good separation of vanadium (IV) from iron. After five stages of extraction and stripping, highly pure vanadyl sulfate containing 76.5 g/L V (IV) with the impurities of 12 mg/L Fe and 10 mg/L Al was obtained, which is suitable for the electrolyte of a vanadium redox flow battery. Organic solution was well regenerated after stripping by oxalic acid solution to remove the remaining iron. The mechanism of vanadium (IV) extraction using EHEHPA was also discussed based on the Fourier transform infrared spectroscopy (FT-IR) analysis.

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Kinetics of the alkaline stripping of vanadium(V) previously extracted by Aliquat® 336

Cited by 28 publications

References 3 publications

Evaluation of magnetic nanoparticles coated by oleic acid applied to solvent extraction processes

Evaluation of magnetic nanoparticles coated by oleic acid applied to solvent extraction processes

On the Potential of a Poly(Vinylidenefluoride-Co-hexafluoropropylene) Polymer Inclusion Membrane Containing Aliquat® 336 and Dibutyl Phthalate for V(V) Extraction from Sulfate Solutions

Preparation of Highly Pure Vanadyl Sulfate from Sulfate Solutions Containing Impurities of Iron and Aluminum by Solvent Extraction Using EHEHPA

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