Extraction and separation studies of gold(III) with 4-(4-methoxybenzylideneimino)-5-methyl-4H-1,2,4-triazole-3-thiol in hydrochloric acid medium

Vidhate, Kaluram N.; Shaikh, Uzma Parveen K.; Arbad, Balasaheb R.; Lande, Machhindra K.

doi:10.1016/j.jscs.2011.12.018

Cited by 8 publications

(4 citation statements)

References 13 publications

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“…The thiol MHTT was selected in this study because it is a sulfur-containing ligand, and in general sulfur-containing ligands are highly selective for Au (III). Vidhate and co-workers [19] used 4-(methoxybenzylideneimino)-5-methyl-4H-1,2,4-triazole-3-thiol (MBIMTT) for the extraction of gold from an acidic solution in chloroform. The loading capacity of 10 mL, 0.1 M MBIMTT was found to be 6.5 mg of gold (III).…”

Section: Table 1 Ligands Selected For Investigation In This Studymentioning

confidence: 99%

Selection of a suitable ligand for the supercritical extraction of gold from a low-grade refractory tailing

Dyk

Mawire

Potgieter

et al. 2022

The Journal of Supercritical Fluids

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Reprocessing tailings for gold recovery is generating new low-grade refractory secondary tailings. Unlocking gold trapped within these secondary tailings potentially holds additional economic value. In this study, the use of supercritical carbon dioxide (scCO2) at 100 bar and 40 °C for gold extraction from such a secondary gold tailings sample (0.27 g/t) was investigated. The research identified and screened the following ligands as suitable extractants for gold in scCO2, i.e. 3-(trifluoromethyl)-phenyl-thiourea (TPT), 1,1,1-trifluoro-2,4pentanedione (TFA), betaine bis(trifluoromethylsulfonyl)imide ([Hbet][TF2N]), 4-methyl-4H-1,2,4-triazole-3-thiol (MHTT) and hexafluoroacetylacetone (HFA). Results from screening experiments showed that extraction of gold for all ligands in the presence of a tri-n-butyl phosphate-nitric acid adduct (TBP-HNO3) as oxidant exceeded 50% after 18 h, with the highest extraction offered by [Hbet][TF2N] (82% after 24 h). A comparative study, where no scCO2 was present, showed that the presence of scCO2 offered a distinct advantage in extraction.

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Section: Table 1 Ligands Selected For Investigation In This Studymentioning

confidence: 99%

Selection of a suitable ligand for the supercritical extraction of gold from a low-grade refractory tailing

Dyk

Mawire

Potgieter

et al. 2022

The Journal of Supercritical Fluids

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“…In the present investigations, extraction behavior of osmium(VIII) using 4-(4methoxybenzylideneimino)-5-methyl-4H-1,2,4-triazole-3-thiol(MBIMTT) dissolved in chloroform as an extractant presence of hydrochloric acid media. MBIMTT has been employed successfully in this laboratory for the extraction of Rh(III), Ru(III) and Au(III), Pd(II) and Pt(IV), Ir(III) [13][14][15][16][17][18] .…”

Section: Research Articlementioning

confidence: 99%

Liquid Anion Exchange Chromatographic Extraction and Separation of Osmium(VIII) with 4-(4-Methoxy-benzylideneimino)-5-methyl-4H-1,2,4-triazole-3-thiol in Hydrochloric Acid Medium

2016

Chem Sci Trans

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A novel method is proposed for the extraction of microgram level concentration of osmium(VIII) from hydrochloric acid medium with 4-(4-methoxybenzylideneimino)-5-methyl-4H-1,2,4-triazole-3-thiol (MBIMTT) dissolved in chloroform as an extractant. The osmium(VIII) from the organic phase is stripped with mixture of thiourea and 2 M hydrochloric acid and determined spectrophotometric method. The method affords the binary separation and determination of osmium(VIII) from synthetic mixture. The method is successfully applied for the separation and determination of osmium from the alloys. The method is highly selective, simple and reproducible.

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“…Solvent extraction of metals is already well established as efficient alternative to traditional techniques [21]. Different extractants have been developed and employed as extraction reagents for precious metals especially for gold (III) for both commercial and analytical purposes including trin-butylphosphate [22], cetylpyridinium bromide/tributyl phosphate [23], 2,3-dichloro-6-(3-caboxy-2-hydroxy-1-napthylazo)quinoxaline [24], N-n-octylaniline [25], 1-octyl-3-methylimidazolium hexafluorophosphate [26], 4-(4'-methoxybenzylideneimino)-5-methyl-4H-1,2,4triazole-3-thiol [27], N-methyl-N-butylhexylamide [28], furfuryl thioalcohol [29], 4-(4'-Flurobenylideneimino)-3-methyl-5-mercapto-1,2,4-triazole [30]. However, some of solvent extraction system used large quantity of extractant in different organic solvent, which may cause some of the environmental and workers health problems.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of 2-dodecylaminopyridine for the liquid-liquid extraction of gold(III) from succinic acid medium

Shep

Pawar²,

Arbad³

2021

J Met Mater Miner

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Extractive recovery of gold(III) from succinic acid solution with high molecular weight amine: 2-dodecylaminopyridine (2-DDAP) as a new extractant in xylene has been investigated. Extraction data indicates that 5 × 10-4 mol⋅L-1 2-DDAP is a very efficient and fast extractant. Gold(III) can be effectively extracted (D = 414.16) with 2-DDAP from 0.04 M succinic acid solution. The equilibrium of gold(III) from aqueous phase of succinic acid with 2-DDAP is achieved within 60 sec. The extraction of gold(III) with 2-DDAP proceed at the interface according to ion pair formation mechanism. The best stripping solution from among the studied ones is the 4 M ammonia solution. The selective extraction of gold(III) from some precious and base metals was carried out by 2-DDAP using proposed method and the results obtained are found to be highly effective for synthetic sample.

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Extraction and separation studies of gold(III) with 4-(4-methoxybenzylideneimino)-5-methyl-4H-1,2,4-triazole-3-thiol in hydrochloric acid medium

Cited by 8 publications

References 13 publications

Selection of a suitable ligand for the supercritical extraction of gold from a low-grade refractory tailing

Selection of a suitable ligand for the supercritical extraction of gold from a low-grade refractory tailing

Liquid Anion Exchange Chromatographic Extraction and Separation of Osmium(VIII) with 4-(4-Methoxy-benzylideneimino)-5-methyl-4H-1,2,4-triazole-3-thiol in Hydrochloric Acid Medium

Efficiency of 2-dodecylaminopyridine for the liquid-liquid extraction of gold(III) from succinic acid medium

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