Utility of 1-Octanol/Octane Mixed Solvents for the Solvent Extraction of Aluminum(III), Gallium(III), and Indium(III) with 8-Quinolinol

Yamada, Hiromichi; Hayashi, Hiroyuki; Yasui, Takashi

doi:10.2116/analsci.22.371

Cited by 13 publications

(8 citation statements)

References 17 publications

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“…Octan-1-ol has been used to quantitatively extract Nb(V) and Ta(V) from sulphate leach liquor (El-Hazek et al, 2012). Some workers have also reported the extraction of Al(III), Ga (III) and In(III) from perchlorate solutions by I-octanol/octane solvent system (Yamada et al, 2006). Tantalum (V) and niobium (V) have equally been separated from HF/H 2 SO 4 mixture by sec-octanol with remarkable high efficiencies and notably high recycling potential implying that the extractant is rarely degraded (Huifang, Wannian, & Yugi, 1996).…”

Section: Introductionmentioning

confidence: 99%

Alkanols for the Extraction of Vanadium (V) From Hydrochloric Acid Solutions

Ojo¹,

Oyegoke²

2013

IJC

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Extractive recovery of vanadium (V) from hydrochloric acid solutions using alkanols (1-butanol and 1-octanol) dissolved in n-heptane has been investigated by liquid-liquid extraction, propelled by the need to proffering alternatives to the scarce and relatively costly organophosphorous extractants. At the studied pH range (1.0-4.0), with 1-butanol as extractant, the percentage V(V) extraction (extraction efficiency, E%) reached optimum (E% = 63.3) at pH of 0.5, and for 1-octanol, optimum E% was 73.3 at pH 1.0.Increasing concentration of HCl at the studied range (1.0-6.0 mol L -1 ) was found to have an appreciable effect on percentage V(V) extraction. With both extractants, E% peaked at 6.0 mol L -1 HCl with values 86.7 and 70.0% for 1-butanol and 1-octanol, respectively. With increase in the concentration of extractants, both extractants produced a trend of increase/decrease in E% for V(V), suggesting the extraction of two different species. The optimal percentage extraction values were 76.7 and 96.7% observed at log[1-butanol] = 0.81 mol L -1 and log[1-octanol] = 0.49 mol L -1 , in that order. The determined enthalpy change, ΔH, for 1-butanol and 1-octanol systems were -19.9kJ mol -1 and -37.1 kJ mol -1 , respectively, indicating exothermic extraction processes. On the number of required extraction stages, 1-octanol gave a higher extraction efficiency after three consecutive extractions (E% = 99.3) than 1-butanol (E% = 88.6). Recycling experiment showed 1-octanol as more recyclable than 1-butanol (Recycling coefficient R.C. = 1.0 for 1-octanol while R.C. < 1.0 for 1-butanol). All extractants mixed with 1-butanol were found antagonistic. All added foreign ions decreased E% for V(V). From slope analysis, analytical and spectra data, the extracted complexes have been formulated as VO 2 Cl·nROH and (VO 2 Cl) m ·nROH (where m >> n) at low and high concentrations of extractant, respectively. On the whole, 1-octanol could be adjudged a better extractant for vanadium (V) under the prevailing experimental conditions.

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Section: Introductionmentioning

confidence: 99%

Alkanols for the Extraction of Vanadium (V) From Hydrochloric Acid Solutions

Ojo¹,

Oyegoke²

2013

IJC

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“…The models can be applied to assess the stability constants for the complexes of new and virtual organic ligands. The log K values are predicted by the eMLR consensus models, standard deviations are given in parentheses c Predicted log K was evaluated as an arithmetic mean of N m values obtained by numerous individual models of the eMLR CM excluding those leading to outlying values and being outside the fragment control AD d [87] e [88] f [89] g [90] h [91] i [92] …”

Section: And In Supporting Informationmentioning

confidence: 99%

The complexation of metal ions with various organic ligands in water: prediction of stability constants by QSPR ensemble modelling

Соловьев

Kireeva

Ovchinnikova

et al. 2015

J Incl Phenom Macrocycl Chem

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“…The use of alkanols to extract valuable metals such as niobium (V) and tantalum (V), aluminium (III), gallium (III) and indium (III) was reviewed as well (Yamada, Hayashi & Yasui, 2006).…”

Section: Introductionmentioning

confidence: 99%

On the Extraction of Vanadium (V) by Alkanols: A comparative Study of 1-pentanol and 3-methyl-1-butanol Isomers as Extractants for Vanadium (V) Extraction from Hydrochloric Acid Solutions

Ojo¹,

Oyegoke²

2016

IJC

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Further to the previous study on the extractive recovery of V(V) from HCl solution by some alkanols, the extraction of V(V) from HCl solutions by 1-pentanol and 3-methyl -1-butanol (isomers) dissolved in n-heptane were investigated in the present study, still propelled by the need to proffering viable alternatives to the scarce and relatively costly organophosphorous extractants, and also compare the extraction efficiency of straight-and branched-chain extractants. At the studied pH range (0.5-4.0) with 1-penttanol as extractant, the percentage V(V) extraction (extraction efficiency, E%) reached optimum E%= 40.0 at pH of 3.0 and for 3-methyl-1-butanol, optimum E% was 36. respectively, indicating exothermic/endothermic extraction processes. The isomer 3-methyl -1-butanol gave a higher extraction efficiency after a three-stage extraction (E% = 92.5) than 1-pentanol (E% = 83.4). Recycling experiment revealed both to be recyclable. From slope analysis, analytical and spectra data, the extracted complexes have been formulated as VO 2 Cl.nROH and (VO 2 Cl) m .nROH (where m>> n) at low and high concentrations of extractant, respectively. On the whole, 3-methyl-1-butanol was assessed as fairly better as an extractant for vanadium (V) at lower temperature experimental conditions. The effect of methyl branched-chain played an insignificant role on the extraction.

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Utility of 1-Octanol/Octane Mixed Solvents for the Solvent Extraction of Aluminum(III), Gallium(III), and Indium(III) with 8-Quinolinol

Cited by 13 publications

References 17 publications

Alkanols for the Extraction of Vanadium (V) From Hydrochloric Acid Solutions

Alkanols for the Extraction of Vanadium (V) From Hydrochloric Acid Solutions

The complexation of metal ions with various organic ligands in water: prediction of stability constants by QSPR ensemble modelling

On the Extraction of Vanadium (V) by Alkanols: A comparative Study of 1-pentanol and 3-methyl-1-butanol Isomers as Extractants for Vanadium (V) Extraction from Hydrochloric Acid Solutions

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