The recovery and selective extraction of gold and platinum by novel ionic liquids

Boudesocque, Stéphanie; Mohamadou, Aminou; Conreux, Alexandra; Marin, Béatrice; Dupont, Laurent

doi:10.1016/j.seppur.2018.09.002

Cited by 75 publications

(32 citation statements)

References 37 publications

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“…Vereycken et al [51] proposed a one-stage separation method for the noble metals Pd(II), Pt(IV), and Au(III) from Fe(III), Cu(II), Ni(II), and Rh(III) impurities using undiluted Aliquat 336 IL and bromide and iodide Aliquat 336 derivatives, It was also shown that the [TON][Tf 2 N] and [THN][Tf 2 N] ILs do not extract Pt(II) or Pt(IV). This fact was attributed [52] to the higher charge density and higher Gibbs energy of the PtCl 4 2− and PtCl 6 2− anions in comparison with AuCl 4 − .…”

Section: Noble Metalsmentioning

confidence: 99%

Ionic Liquids as Components of Systems for Metal Extraction

Yudaev

Chistyakov

2022

ChemEngineering

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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.

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Section: Noble Metalsmentioning

confidence: 99%

Ionic Liquids as Components of Systems for Metal Extraction

Yudaev

Chistyakov

2022

ChemEngineering

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“…While phosphate is not per se toxic, release of excessive amounts into aquatic environments can promote algal growth and lead to eutrophication. [245] Regarding NTf 2 À , which has been reported by many researchers referenced in this review, [142,143,145,[150][151][152]155,[157][158][159][160][161]163,184,[185][186][187][188][195][196][197] its ecotoxicological potential has been established. [246] The overwhelming majority of publications presented herein, reports the use of some organic solvent as a diluent for the IL.…”

Section: Environmental Considerationsmentioning

confidence: 72%

Liquid‐ and Solid‐based Separations Employing Ionic Liquids for the Recovery of Platinum Group Metals Typically Encountered in Catalytic Converters: A Review

et al. 2022

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The wide application range and ascending demand for platinum group metals combined with the progressive depletion of their natural resources renders their efficient recycling a very important and pressing matter. Primarily environmental considerations associated with state‐of‐the‐art recovery processes have shifted the focus of the scientific community toward the investigation of alternative recycling approaches. Within this context, ionic liquids have gained considerable attention in the last two decades chiefly sparked by properties such as tunabilty, low‐volatility, and relatively easy recyclability. In this review an understanding of the state‐of‐the‐art processes, including their drawbacks and limitations, is provided. The core of the discussion is focused on platinum group metal recovery with ionic liquid‐based systems. A brief insight in some environmental considerations related to ionic liquids is also provided while some discussion on research gaps, common misconceptions related to ionic liquids and outlook on unresolved issues could not be absent from this review.

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“…Fajar et al used a trioctyl(dodecyl) phosphonium chloride (P 88812 Cl) ionic liquid as an ion carrier in polymer inclusion membrane for the removal of Pd(II) ions with an efficiency of 98% [44]. Boudessocque et al applied ionic liquids bearing tetrahexylammonium and tetraoctylammonium cations and halide, dicyanamide, thiocyanato, and bis(trifluoromethysulfonyl)imide in the solvent extraction process for removal of Au(III) and Pt(II) ions (efficiency above 90%) [45].…”

Section: Discussionmentioning

confidence: 99%

Efficient Recovery of Noble Metal Ions (Pd2+, Ag+, Pt2+, and Au3+) from Aqueous Solutions Using N,N'-Bis(salicylidene)ethylenediamine (Salen) as an Extractant (Classic Solvent Extraction) and Carrier (Polymer Membranes)

et al. 2021

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This paper presents the results of the first application of N,N'-bis(salicylidene)ethylenediamine (salen) as an extractant in classical liquid–liquid extraction and as a carrier in membrane processes designed for the recovery of noble metal ions (Pd2+, Ag+, Pt2+, and Au3+) from aqueous solutions. In the case of the utilization of membranes, both sorption and desorption were investigated. Salen has not been used so far in the sorption processes of precious metal ions. Recovery experiments were performed on single-component solutions (containing only one type of metal ions) and polymetallic solutions (containing ions of all four metals). The stability constants of the obtained complexes were determined spectrophotometrically. In contrast, electrospray ionization high-resolution mass spectrometry (ESI-HRMS) was applied to examine the elemental composition and charge of the generated complexes of chosen noble metal ions and salen molecules. The results show the great potential of N,N'-bis(salicylidene)ethylenediamine as both an extractant and a carrier. In the case of single-component solutions, the extraction percentage was over 99% for all noble metal ions (molar ratio M:L of 1:1), and in the case of a polymetallic solution, it was the lowest, but over 94% for platinum ions and the highest value (over 99%) for gold ions. The percentages of sorption (%Rs) of metal ions from single-component solutions using polymer membranes containing N,N'-bis(salicylidene)ethylenediamine as a carrier were highest after 24 h of the process (93.23% for silver(I) ions, 74.99% for gold(III) ions, 69.11% and 66.13% for palladium(II) and platinum(II) ions, respectively), similar to the values obtained for the membrane process conducted in multi-metal solutions (92.96%, 84.26%, 80.94%, and 48.36% for Pd(II), Au(III), Ag(I), and Pt(II) ions, respectively). The percentage of desorption (%Rdes) was very high for single-component solutions (the highest, i.e., 99%, for palladium solution and the lowest, i.e., 88%, for silver solution), while for polymetallic solutions, these values were slightly lower (for Pt(II), it was the lowest at 63.25%).

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The recovery and selective extraction of gold and platinum by novel ionic liquids

Cited by 75 publications

References 37 publications

Ionic Liquids as Components of Systems for Metal Extraction

Ionic Liquids as Components of Systems for Metal Extraction

Liquid‐ and Solid‐based Separations Employing Ionic Liquids for the Recovery of Platinum Group Metals Typically Encountered in Catalytic Converters: A Review

Efficient Recovery of Noble Metal Ions (Pd2+, Ag+, Pt2+, and Au3+) from Aqueous Solutions Using N,N'-Bis(salicylidene)ethylenediamine (Salen) as an Extractant (Classic Solvent Extraction) and Carrier (Polymer Membranes)

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