Solvent extraction of copper(II) from chloride media using N-(thiocarbamoyl)benzamidine and N-benzoylthiourea derivatives

Aamrani, F.Z. El; Kumar, Anil; Cortina, José Luis; Sastre, Ana Marı́a

doi:10.1016/s0003-2670(98)00785-5

Cited by 30 publications

(20 citation statements)

References 8 publications

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“…This phenomenon was mentioned by El Aamrani et al when the N-(thiocarbamoyl)benzamide and benzoylthiourea amphiphilic ligands were used for Pd(II) extraction [75]. The same behavior was also reported by Wisniewski et al during the extraction of copper(II) with alklphenylamine derivatives [76]. Furthermore, it is noticeable that the higher acidity, the higher is the extractability (see Table 3; Fig.…”

Section: Dependence Of the Nickel(ii) Extraction On Contact Timesupporting

confidence: 70%

Synthesis and Characterization of a Novel Series of Amphiphilic Mercapto‐1,2,4‐Triazole Schiff Base Ligands: Investigation of their Behavior in Hydro‐Organic Solutions

Boceiri

Benabdallah

Youcef

et al. 2016

J Surfact & Detergents

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A novel series of four Schiff base amphiphiles derived from 3-mercapto-1,2,4-triazole and different alkyl chains were successfully prepared by a new synthetic three-step method. The chemical structures of the different ligands were characterized by elemental analysis, FT-IR spectroscopy, 1 H-NMR and 13 C-NMR spectra. The effect of the chain length on the solution behavior of the amphiphilic ligands were studied, in both homogeneous and heterogeneous systems, using pH-metric and spectrophotometric methods. Based on the electronic spectroscopy data, some parameters governing their surfactant properties, such as the critical micelle concentration (CMC), the micellization free energy (DG mic ) and the hydrophilic-lipophilic balance (HLB) were evaluated in chloroform and discussed. The behavior of the four Schiff bases in the heterogeneous chloroform-water mixture was then explored through the establishment of their acidity (pK A ) and distribution (Log K d ) constants in 1 M chloride medium and the acidity constants in aqueous medium (pK a ) were deduced. Results showed that an increase of the alkyl chain decreases the distribution of the ligands and increases their acidity. The extractive performance of the Schiff base amphiphiles were investigated towards Ni(II) from a chloride medium at 30°C. The analysis of extraction data revealed that the synthesized Schiff bases exhibit a better and faster extractability than many ligands reported in the literature.

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Section: Dependence Of the Nickel(ii) Extraction On Contact Timesupporting

confidence: 70%

Synthesis and Characterization of a Novel Series of Amphiphilic Mercapto‐1,2,4‐Triazole Schiff Base Ligands: Investigation of their Behavior in Hydro‐Organic Solutions

Boceiri

Benabdallah

Youcef

et al. 2016

J Surfact & Detergents

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“…As a result, the extraction percentages for both ions with the 3-pyridyl trident extractants were higher than those with the 2-pyridyl trident extractant. In contrast, divalent copper ions exist as cationic species under the given experimental conditions (19). For copper extraction, both trident extractants are relatively effective as compared with their corresponding analogues due to a high extraction efficiency.…”

Section: Extraction Of Other Metal Ionsmentioning

confidence: 97%

Selective Extraction of Precious Metal Ions with Novel Trident Molecules Containing Pyridyl Groups

Yamaguma

Yamashita

Kawakita

et al. 2012

Separation Science and Technology

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Trident molecules containing pyridyl groups have been prepared for use as novel extraction reagents to investigate their physicochemical properties for dissolution into the aqueous phase and their ability, together with their corresponding monomeric analogues, to extract precious metal ions. Differences in their behavior were related to the pK a values of the trident molecules and the position of the nitrogen atom in the pyridyl groups. The trident molecules exhibit the ability to selectively extract silver from mixtures of other precious metals. The extraction mechanism and the coordination site of the silver ion with a 2-pyridyl derivative were determined by slope analysis and peak shift of the 1 H-NMR spectra of the extraction reagent before and after silver loading. INTRODUCTIONThe solvent extraction technique has been extensively studied for the separation of precious metals from recycled e-wastes (1). Although processes for the separation of precious metal ions by the company such as INCO (Vale-Inco) have been well established (2,3), these methods are still ineffective and incomplete for mutual separation, especially for the selective recovery of valuable and functionally inert rhodium. The extraction mechanisms for precious metals are classified into two categories: anionic exchange and ion-pair extraction with coordination. Amine or pyridyltype ligands can facilitate the extraction by either mechanism due to their coordination and protonation properties (4-6). Many factors, such as donor properties based on HSAB theory (7), the chelate effect, interfacial activity, and the hydrophobic character of the extraction reagents, can affect the extraction behavior of precious metals.

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“…[2] Solvent extraction technology has been successfully applied for the recovery and separation of copper from aqueous solutions either from hydrometallurgical pregnant solutions [3][4][5] or waste waters, [6][7][8] and has been established as a powerful technique for preconcentration and separation pertaining to analytical applications. [9][10][11] Cu(II) can be prevented from being discharged into the environment after an extractive removal solvent extraction process using hydroxyoximes. [12][13][14][15] Chelating ligands containing O, N-donor sets, have high bonding affinities with some metal ions like Cu(II), Cd(II), Pb(II), etc.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Extraction of Copper from Nitrate Solutions Using β-Hydroxy-Naphthaldoxime and Organophosphorus Compounds into Carbon-Tetrachloride

Dey

Basu

2011

Metall Mater Trans B

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The extraction behavior of Cu(II) from an aqueous nitrate medium employing b-hydroxynaphthaldoxime in carbon tetrachloride has been investigated in the presence of several organophosphorus donors like tri-octyl phosphine oxide, tri-butyl phosphine oxide, and tri-butyl phosphate at pH 1.5. The concentration of the metal was measured by atomic absorption spectrophotometry. Synergism was observed when neutral donor was added because of the formation of the adduct [Cu(L) 2 .(S)] in CCl 4 (S denotes neutral donor). The equilibrium constants of the binary system using b-hydroxy-naphthaldoxime and the ternary system involving another addition of an organophosphorus compound were calculated from the extraction date obtained. Furthermore, the temperature dependence of the equilibrium constants was also investigated to evaluate standard enthalpy (DH°), entropy (DS°), and free energy (DG°) of the reactions proposed.

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Solvent extraction of copper(II) from chloride media using N-(thiocarbamoyl)benzamidine and N-benzoylthiourea derivatives

Cited by 30 publications

References 8 publications

Synthesis and Characterization of a Novel Series of Amphiphilic Mercapto‐1,2,4‐Triazole Schiff Base Ligands: Investigation of their Behavior in Hydro‐Organic Solutions

Synthesis and Characterization of a Novel Series of Amphiphilic Mercapto‐1,2,4‐Triazole Schiff Base Ligands: Investigation of their Behavior in Hydro‐Organic Solutions

Selective Extraction of Precious Metal Ions with Novel Trident Molecules Containing Pyridyl Groups

Synergistic Extraction of Copper from Nitrate Solutions Using β-Hydroxy-Naphthaldoxime and Organophosphorus Compounds into Carbon-Tetrachloride

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