Recovery of vanadium using an aqueous two-phase system consisting of poly (ethylene glycol) 2000 and sodium sulfate

Sun, Tingting; Pan, Yajing; Sun, Xiao; Zhang, Yongqiang

doi:10.1016/j.hydromet.2019.105135

Cited by 14 publications

(12 citation statements)

References 35 publications

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“…Figure 5a shows the effect of temperature on the extraction of metal salts from nitrate solutions. The results show that the temperature slightly affects the extraction efficiency in the range of 288.15–333.15 K, which is consistent with previously obtained data on the extraction of metal salts from chloride and sulfate solutions in systems with polyethylene glycol [36]. As can be seen in Figure 5a, the increase of liquid viscosity at low temperature might be not conducive to mass transfer.…”

Section: Resultssupporting

confidence: 91%

Complex Extraction of Metals in an Aqueous Two-Phase System Based on Poly(Ethylene Oxide) 1500 and Sodium Nitrate

et al. 2019

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This article presents an ecologically safe aqueous two-phase system based on poly(ethylene oxide) with a molecular weight of 1500, designed for complex extraction of Ni(II), Co(II), Fe(III), Mn(II), Zn(II), Cu(II), and Al(III) from nitrate solutions. A kinetic dependence has been investigated for a distribution ratio for the metals examined. The influence of pH-values, temperature, initial metal concentration, and nitric acid content have on the extraction of a wide range of metals in the heterogeneous poly(ethylene oxide) 1500-NaNO3-H2O system has been discovered. As a result, the complex extraction of metals (EMe > 60%) was achieved in one step of extraction without introducing additional chemicals into the system.

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Section: Resultssupporting

confidence: 91%

Complex Extraction of Metals in an Aqueous Two-Phase System Based on Poly(Ethylene Oxide) 1500 and Sodium Nitrate

et al. 2019

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“…Thus, the efficiency of a two-phase aqueous system based on polyethylene glycol and sodium nitrate for the extraction of V (IV) ions from acidic aqueous solutions has been shown. The data obtained in [31][32] suggested that the best vanadium recovery observed at pH=2, which correlates with the data obtained by us.…”

Section: Resultssupporting

confidence: 90%

“…To date, it is known about a relatively small number of works devoted to the vanadium ions extraction [31][32]. The main disadvantage of these systems is that to achieve a quantitative or close to quantitative recovery, it is necessary to introduce complexing agents, for example, potassium thiocyanate, which are mainly toxic.…”

Section: Introductionmentioning

confidence: 99%

Vanadium(IV) ions extraction in the aqueous two-phase system based on poly(ethylene glycol)

Левина

Fedorova

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Vanadium has found wide applications in various industries: metallurgy, electronics, batteries, and others. This element, being dispersed, does not form its minerals and, therefore, is mined along the way. An alternative approach of vanadium extraction is to separate it from heavy oil, by flushing the oil with strong acids solutions and further hydrometallurgical processing. The existing methods of oil dehydration solutions processing for the vanadium extraction are not perfect - they do not meet the “green” chemistry principles. Thus, we investigated V(IV) ions extraction in the aqueous two-phase system (ATPS) based on poly(ethylene glycol) 1500 (16.3wt%) – NaNO3 (36wt%) – H2O. The dependences of V(IV) extraction efficiency on phases time contact, and dependences V(IV) distribution coefficients on salt phase acidity have been obtained. This system is shown to be a prospective solution for the vanadium(IV) recovery from acidic waste steams problem as it is possible to extract vanadium with an efficiency of more than 81.6% per one extraction step (the distribution coefficient of vanadium (IV) was 4.84).

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“…Metals can be extracted into the polymer phase in ATPS only as anions such as MoO 4 2– or VO 3 – . , If the metal does not form oxyanions, some inorganic or organic ligands forming anionic complexes should be added. The efficiency of such a process is determined by the stability of the extracted complex and degree of ion hydratation .…”

Section: Introductionmentioning

confidence: 99%

“…Besides the nature of the extracted compounds, the extraction ability of ATPS depends on such factors as molecular weight of the polymer, the nature of phase-forming salt, ,, and the ratio of components in the polymer–salt–water system. , The interphase distribution of metals depends also on pH, since the acidity changes both composition of extracted metal compounds ,,, and the width of heterogeneous region in ATPS. , The effects of the addition of various ions and of the acidity on phase equilibria in ATPS were studied in refs − . Both increase of concentration of inorganic and organic salts , and increase of pH − expanded the heterogeneous region in the ATPS.…”

Section: Introductionmentioning

confidence: 99%

Effect of Sodium Chloride and pH on the Composition of the Equilibrium Phases and the Partition of Palladium(II) in the Aqueous Two-Phase System PEG1500–Na₂SO₄–Water

et al. 2021

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Binodal curves for aqueous two-phase systems (ATPS) polyethylene glycol 1500 (PEG1500)−sodium sulfate− water with additions of sodium chloride and hydrochloric or sulfuric acids were determined by turbidimetric titration and analysis of coexisting phases. The results are compared with published data for the ATPS PEG1500−sodium sulfate−water without additions, and the influence of additions on the width of the two-phase field, tielines length, and slopes was traced. The influence of initial concentration of palladium, time of phase contact, pH, concentration of sodium chloride and sodium sulfate on the extraction of palladium(II) was studied. The coefficients of distribution of palladium(II) between the phases of ATPS were measured as a function of the concentrations of sodium chloride (0.1, 1.0, and 2.0 mol•L −1 ) and pH values. At lower concentrations of Cl − ions Pd(II) is extracted as a mixture of ions [Pd(H 2 O)Cl 3 ] − and [PdCl 4 ] 2− , whereas the growth of C(Cl − ) leads to prevalence of the latter, which has poorer extraction properties. Maximal values of the distribution coefficient D Pd of about 9.5 ± 0.75 were achieved in the ATPS PEG1500−Na 2 SO 4 −0.1 M HCl and PEG1500− Na 2 SO 4 −(0.05 M H 2 SO 4 + 0.1 M NaCl).

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Recovery of vanadium using an aqueous two-phase system consisting of poly (ethylene glycol) 2000 and sodium sulfate

Cited by 14 publications

References 35 publications

Complex Extraction of Metals in an Aqueous Two-Phase System Based on Poly(Ethylene Oxide) 1500 and Sodium Nitrate

Complex Extraction of Metals in an Aqueous Two-Phase System Based on Poly(Ethylene Oxide) 1500 and Sodium Nitrate

Vanadium(IV) ions extraction in the aqueous two-phase system based on poly(ethylene glycol)

Effect of Sodium Chloride and pH on the Composition of the Equilibrium Phases and the Partition of Palladium(II) in the Aqueous Two-Phase System PEG1500–Na₂SO₄–Water

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Recovery of vanadium using an aqueous two-phase system consisting of poly (ethylene glycol) 2000 and sodium sulfate

Cited by 14 publications

References 35 publications

Complex Extraction of Metals in an Aqueous Two-Phase System Based on Poly(Ethylene Oxide) 1500 and Sodium Nitrate

Complex Extraction of Metals in an Aqueous Two-Phase System Based on Poly(Ethylene Oxide) 1500 and Sodium Nitrate

Vanadium(IV) ions extraction in the aqueous two-phase system based on poly(ethylene glycol)

Effect of Sodium Chloride and pH on the Composition of the Equilibrium Phases and the Partition of Palladium(II) in the Aqueous Two-Phase System PEG1500–Na2SO4–Water

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Effect of Sodium Chloride and pH on the Composition of the Equilibrium Phases and the Partition of Palladium(II) in the Aqueous Two-Phase System PEG1500–Na₂SO₄–Water