Selective liquid-liquid extraction of molybdenum (VI) and rhenium (VII) from a synthetic pregnant leach solution: Comparison between extractants and diluents

Quijada‐Maldonado, E.; Allain, A.; Perez, B. Lopez; Merlet, Gastón; Cabezas, R.; Tapia, Ricardo A.; Romero, Julio

doi:10.1016/j.mineng.2019.106060

Cited by 27 publications

(12 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Quijada-Maldonado et al [89] studied the selective extraction of molybdenum(VI) and rhenium(VII) from a synthetic highly acidic solution using In the extraction of REE from nitric acid solutions using DMDODGA, the replacement of the n-octanol/kerosene diluent by the [bmim][NTf 2 ] IL results in a considerable increase in the distribution ratios of lanthanum(III), neodymium(III), samarium(III), gadolinium(III), and ytterbium(III). For example, in the case of neodymium(III), the distribution ratio was of the order of 10 2 with n-octanol/kerosene as the diluent [90] and of the order of 10 4 when the ionic liquid was used [91].…”

Section: Ionic Liquids Based On the Imidazolium Cation As Diluentsmentioning

confidence: 99%

Ionic Liquids as Components of Systems for Metal Extraction

Yudaev

Chistyakov

2022

ChemEngineering

View full text Add to dashboard Cite

This review addresses research and development on the use of ionic liquids as extractants and diluents in the solvent extraction of metals. Primary attention is given to the efficiency and selectivity of metal extraction from industrial wastewater with ionic liquids composed of various cations and anions. The review covers literature sources published in the period of 2010–2021. The bibliography includes 98 references dedicated to research on the extraction and separation of lanthanides (17 sources), actinides (5 sources), heavy metals (35 sources), noble metals, including the platinum group (16 sources), and some other metals.

show abstract

Section: Ionic Liquids Based On the Imidazolium Cation As Diluentsmentioning

confidence: 99%

Ionic Liquids as Components of Systems for Metal Extraction

Yudaev

Chistyakov

2022

ChemEngineering

View full text Add to dashboard Cite

show abstract

“…However, in view of these results, a different extraction path could be proposed. First, the Mo(VI) extraction would be performed by the use of D2EHPA in the IL [omim][Tf2N], ensuring a selective extraction of this metal ion 6 . Next, Re(VII) could be selectively purified from the rest of the metal ions still present in the aqueous solution using the extracting phase proposed in this work: the IL [TOMA][BA] dissolved in the IL [omim][Tf2N].…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the key factor to achieving a cost‐effective recovery of these valuable metal ions is selectivity. Recent works have proved that the use of ionic liquids (ILs) as diluents improve the distribution ratios 6,7 and thus the selectivity of the SX process. Cai et al 8 .…”

Section: Introductionmentioning

confidence: 99%

Rhenium(VII) extraction from sulfuric aqueous solutions using ionic liquids as diluent and extractant: insights on the extraction stoichiometry and process parameters

Quijada‐Maldonado

Román

Merlet

et al. 2022

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND Rhenium(Re) is a highly valuable metal recovered from molybdenite leach liquors by solvent extraction (SX) using toxic organic solvents. This work proposes an extracting phase free of volatile organics composed by the ionic liquid (IL) trioctylmethylammonium benzoate [TOMA][BA] as the extractant, due to its ability to extract Re(VII), and the IL 1‐octyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide [omim][Tf2N] as the diluent, due to its high hydrophobicity where the extraction stoichiometry and process parameters such as the initial pH, the extractant concentration in the diluent and stripping using ammonium hydroxide (boldNH4boldOH) and sodium hydroxide (boldNaOH) were assessed. RESULTS This extracting phase yielded high extraction percentages: 95% with only 3% (v/v) of [TOMA][BA] in [omim][Tf2N]. A detailed study of the SX stoichiometry was carried out through slope analysis, showing that the SX occurs in two steps: first, the extraction of acid; then, the extraction of the metal ion via anion exchange with the transfer of IL‐diluent anion to the aqueous phase. Additionally, the extracting phase was tested in a synthetic molybdenite leached pregnant leach solution, showing selectivity towards Re(VII) over Cu(II) and Fe(III) at very low extractant concentration. The stripping of Re(VII) from the loaded phase was also studied achieving 60% stripping in only one equilibrium step when using boldNH4boldOH. CONCLUSION This novel extracting phase, free of volatile organic, shows promising Re(VII) extraction for future industrial applications. © 2021 Society of Chemical Industry (SCI).

show abstract

“…Due to these properties, these liquids are considered to be green solvents. Ionic liquids are used in several Processes 2021, 9, 608 2 of 13 fields, e.g., biochemistry [24], electrochemistry [25], pharmaceutics [26,27], and analytical chemistry [28], and in the recovery of metals, with recent applications discussed in the literature including base metals [29][30][31], rare earths [32][33][34], indium [35,36], gold [37,38], and others [39,40].…”

Section: Introductionmentioning

confidence: 99%

Insight into the Liquid–Liquid Extraction System AuCl4−/HCl/A327H+Cl− Ionic Liquid/Toluene

López

2021

Processes

View full text Add to dashboard Cite

The ionic liquid A327H+Cl− is generated by reaction of the tertiary amine A327 (industrial mixture of tri-octyl and tri-decyl amines) and hydrochloric acid solutions. In this study, the extraction of Au(III) by A327H+Cl− ionic liquid under various variables, including metal and ionic liquid concentrations, was investigated. Results indicate that A327H+AuCl4− is formed by an exothermic (ΔH° = −3 kJ/mol) reaction in the organic solution. Aqueous ionic strength influences the formation constant values, and the specific interaction theory (SIT) was used to estimate the interaction coefficient between AuCl4− and H+. Gold (III) was stripped using thiocyanate media, and from the strip solutions, gold was precipitated as gold nanoparticles.

show abstract

Selective liquid-liquid extraction of molybdenum (VI) and rhenium (VII) from a synthetic pregnant leach solution: Comparison between extractants and diluents

Cited by 27 publications

References 34 publications

Ionic Liquids as Components of Systems for Metal Extraction

Ionic Liquids as Components of Systems for Metal Extraction

Rhenium(VII) extraction from sulfuric aqueous solutions using ionic liquids as diluent and extractant: insights on the extraction stoichiometry and process parameters

Insight into the Liquid–Liquid Extraction System AuCl4−/HCl/A327H+Cl− Ionic Liquid/Toluene

Contact Info

Product

Resources

About