Characterization of the solid third phases that precipitate from the organic solutions of Aliquat® 336 after extraction of molybdenum(VI) and vanadium(V)

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

doi:10.1016/j.hydromet.2004.07.004

Cited by 84 publications

(27 citation statements)

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“…In acidic solution, the ion exchange is used to recover vanadium by D314 resin from the feedstock with fewer metallic impurities (Hu et al, 2009;Wang et al, 2010;. Besides ion exchange, solvent extraction is also commonly used to extract vanadium (IV) from acidic sulfate media by using acidic extractants D2EHPA , EHEHPA (Li et al, 2012) and chelated extractant LIX63 (Zhang et al, 1996), and separate vanadium (V) using amines Aliquat 336 (Bal et al, 2004), Primene 81R, Alamine 336 (Lozano and Godinez, 2003) and TOA (Chagnes et al, 2010) from various acidic solutions. carried out the extraction of vanadium (V) from sulfuric leach solution of stone coal using weak base resin D314.…”

Section: Introductionmentioning

confidence: 99%

Comparison of ion exchange and solvent extraction in recovering vanadium from sulfuric acid leach solutions of stone coal

et al. 2013

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Section: Introductionmentioning

confidence: 99%

Comparison of ion exchange and solvent extraction in recovering vanadium from sulfuric acid leach solutions of stone coal

et al. 2013

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“…On the use of amines as extractants for V(V), a host of successful extractions in alkaline media involving anionic vanadium (V) species have been carried out (El-Nadi, Awwad, & Nayl, 2009;Bal et al, 2004).…”

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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“…The authors also showed that stripping efficiency of Alamine 336 was higher than that of Aliquat 336. The simultaneous extraction of Mo(VI) and V(V) by Aliquat 336 has been investigated in the absence and in the presence of phosphate and it has been observed that solid compounds also was slowly precipitated from the loaded organics 24) . A process for the extraction of molybdenum in the presence of other metals from sulfuric acid medium was studied by Valverde Jr .…”

Section: )mentioning

confidence: 99%

Recovery of Molybdenum and Vanadium from Acidic Leaching Solution of Spent Catalysts by Solvent Extraction

Nguyen¹,

Lee

2013

Journal of the Korean Institute of Resources Recycling

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The recovery of molybdenum and vanadium from acid leaching solutions of spent catalysts using solvent extraction has been investigated. Among various acid leaching solutions, sulfuric acid solution is found to be adequate for the recovery of these two metals. The extraction and stripping behavior of the two metals in the absence and presence of other impurity metals by various types of extractants such as cationic, solvating, amine and a mixture of cationic and solvating extractants was discussed. Each type of extractants has advantage and disadvantage in terms of the possibility of separation and of forming a third phase. Among the various types of extractants, a mixture of cationic and solvating extractants seems to be the most promising extractant system for the separation of Mo and V from the acid leaching solutions of spent catalysts.

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Characterization of the solid third phases that precipitate from the organic solutions of Aliquat® 336 after extraction of molybdenum(VI) and vanadium(V)

Cited by 84 publications

References 36 publications

Comparison of ion exchange and solvent extraction in recovering vanadium from sulfuric acid leach solutions of stone coal

Comparison of ion exchange and solvent extraction in recovering vanadium from sulfuric acid leach solutions of stone coal

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

Recovery of Molybdenum and Vanadium from Acidic Leaching Solution of Spent Catalysts by Solvent Extraction

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