Recovery of Pd(II) in chloride solutions by solvent extraction with new vinyl sulfide ploymer extractants

Shi, Wei; Hu, Yifan; Li, Quan; Lan, Tianqi; Zhang, Xueyan; Cao, Jing

doi:10.1016/j.hydromet.2021.105716

Cited by 8 publications

(3 citation statements)

References 31 publications

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“…Pyrometallurgical processes require very high temperatures (over 1500 °C) and generate a large amount of waste and atmospheric emissions [ 8 ]. During the hydrometallurgical treatment of WEEE, a leaching solution of WEEE is prepared in concentrated hydrochloric acid in the presence of oxidizing agents, for example, aqua regia [ 9 ], which is followed by the separation and extraction of palladium(II), platinum(IV), gold(III), silver(I), copper(II), tin(II), lead(II), nickel(II), iron(II), and zinc(II) using electrodeposition, extraction, ion exchange, membrane separation, and other techniques.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Palladium(II) with a Magnetic Sorbent Based on Polyvinyl Alcohol Gel, Metallic Iron, and an Environmentally Friendly Polydentate Phosphazene-Containing Extractant

Yudaev

Butorova

Степанов

et al. 2022

Gels

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In this work, a highly efficient and environmentally friendly method for extracting palladium from hydrochloric acid media was developed. The method uses a magnetic sorbent carrying an organophosphorus extractant, which is not washed from the sorbent into the aqueous phase. The extractant was characterized by 1H, 13C, and 31P NMR spectroscopy and MALDI TOF mass spectrometry, and the palladium complex based on it was characterized by IR spectroscopy. According to an in vitro microbiological study, the extractant was non-toxic to soil microflora. It was established that the water uptake and saturation magnetization of the magnetic sorbent were sufficient for use in sorption processes. The sorption efficiency of palladium(II) with the developed sorbent can reach 71% in one cycle. After treatment of the spent sorbent with 5 M hydrochloric acid, palladium was completely extracted from the sorbent. The new sorbent is proposed for the extraction of palladium from hydrochloric acid media obtained by the leaching of electronic waste.

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Section: Introductionmentioning

confidence: 99%

Extraction of Palladium(II) with a Magnetic Sorbent Based on Polyvinyl Alcohol Gel, Metallic Iron, and an Environmentally Friendly Polydentate Phosphazene-Containing Extractant

Yudaev

Butorova

Степанов

et al. 2022

Gels

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“…Ren et al [27] investigated that single stage extraction of Cu (II) is > 99.5 % when 0.18 mol L -1 acetate ions were added in aqueous solution and pH was 4.44 and in the stripping process, the ability to back extract Cu(II) from the loaded D2EHPA is 6.0 mol L -1 HCl > 3.0 mol L -1 H2SO4 > 2.0 mol L -1 H3PO4. Some researchers have been used organosulfur compounds as extractant for effective and selective extraction of metals [28][29][30][31][32][33]. Organosulfur extractant have higher metal binding ability because presence of lone pair in high energy state and empty 3d orbitals which consequences especially in the field of metal ion complexation [34,35].…”

Section: Introductionmentioning

confidence: 99%

Endothermic solvent extraction of copper (II) with furfuryl thioalcohol from sulfate medium

Shep¹,

Kondre²,

Shep

et al. 2022

Metall Mater Eng

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A simple solvent extraction method was developed to extract copper (II) from sulfate solution. The extraction of copper (II) with furfuryl thioalcohol was investigated. The effect of variables such as aqueous phase pH, furfuryl thioalcohol concentration, temperature, stripping reagents, and diluents was investigated. The extraction data revealed that using 15% (v/v) furfuryl thioalcohol with aqueous solution containing 0.5 mol L-1 Na2SO4, equilibrium pH 5.5, and phase ratio organic phase: aqueous phase (O:A) of 1:1 resulted in 98.20 percent extraction of copper (II) without nickel coextraction (II). Extraction isotherm results show that the extraction procedure is endothermic, with ΔH = 28.542 kJ mol-1 and ΔS = 41.740 J K-1 mol-1. Using 2.0 M H2SO4, copper loaded in organic phase was stripped at a rate greater than 99 percent.

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“…Silsesquioxane-siloxanes are excellent modifying agents for dental materials [6]. The vinyl sulfide polymer can efficiently extract Pd(II) from chloride solutions [7]. Quite a few electrically conductive polymers are used in electronics [8].…”

Section: Introductionmentioning

confidence: 99%

Determination of the Degree of Crystallinity of Poly(2-methyl-2-oxazoline)

et al. 2021

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A new method for purification of 2-methyl-2-oxazoline using citric acid was developed and living cationic ring-opening polymerization of 2-methyl-2-oxazoline was carried out. Polymerization was conducted in acetonitrile using benzyl chloride—boron trifluoride etherate initiating system. According to DSC data, the temperature range of melting of the crystalline phase of the resulting polymer was 95–180 °C. According to small-angle X-ray scattering and wide-angle X-ray diffraction data, the degree of crystallinity of the polymer was 12%. Upon cooling of the polymer melt, the polymer became amorphous. Using thermogravimetric analysis, it was found that the thermal destruction of poly(2-methyl-2-oxazoline) started above 209 °C.

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Recovery of Pd(II) in chloride solutions by solvent extraction with new vinyl sulfide ploymer extractants

Cited by 8 publications

References 31 publications

Extraction of Palladium(II) with a Magnetic Sorbent Based on Polyvinyl Alcohol Gel, Metallic Iron, and an Environmentally Friendly Polydentate Phosphazene-Containing Extractant

Extraction of Palladium(II) with a Magnetic Sorbent Based on Polyvinyl Alcohol Gel, Metallic Iron, and an Environmentally Friendly Polydentate Phosphazene-Containing Extractant

Endothermic solvent extraction of copper (II) with furfuryl thioalcohol from sulfate medium

Determination of the Degree of Crystallinity of Poly(2-methyl-2-oxazoline)

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