Cadmium(II) Extraction from Phosphoric Media by<i>bis</i>(2,4,4‐Trimethylpentyl)dithiophosphinic Acid (CYANEX 301)

Ocio, A.; Almela, A.; Elizalde, M.P.

doi:10.1081/sei-200037455

Cited by 17 publications

(4 citation statements)

References 34 publications

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“…This fact was proved by the extraction of Pb(II) [17], Zn(II) [18] and Cd(II) [19] from aqueous solutions containing phosphoric acid at different concentrations. In the case of Cd(II) and Zn(II) the numerical treatment of the extraction data at each phosphoric acid concentration (0.4 to 7.3 mol·L −1 ) confirmed the stoichiometry MR 2 for the extracted complexes and allowed the determination of the conditional extraction constant values.…”

Section: List Of Symbolsmentioning

confidence: 96%

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Correlation of the Extraction Constant Values of Zn2+ and Cd2+ from Phosphoric Acid Media by Bis(2,4,4-trimethylpentyl)dithiophosphinic Acid Dissolved in Toluene

2012

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Values of the extraction constants of Zn 2+ and Cd 2+ from aqueous phosphoric acid solutions (0.36 to 7.31 mol·L −1 ) by Cyanex 301 in toluene, involving formation of the complexes ZnR 2 and CdR 2 with R being bis(2,4,4-trimethylpentyl)dithiophosphinate, have been correlated at T = 298 K as a function of the ionic strength. For this purpose the activity coefficients of all of the aqueous species have been calculated taking into account both the protolytic equilibria of concentrated phosphoric acid and complexation reactions between the cations and the phosphoric acid species. Good correlations have been obtained for the extraction constant values with the ionic strength, provided the release of water molecules during the extraction processes is considered. Finally, extraction constant values are reported at infinite dilution.

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Section: List Of Symbolsmentioning

confidence: 96%

“…The distribution equilibria of zinc and cadmium ions between aqueous phosphoric acid solutions with bis(2,4,4-trimethylpentyl)dithiophosphinic acid (HR) dissolved in toluene [18,19] are explained according to the general reaction:…”

Section: Calculation Of the Extraction Stoichiometric Constant Valuesmentioning

confidence: 99%

Correlation of the Extraction Constant Values of Zn2+ and Cd2+ from Phosphoric Acid Media by Bis(2,4,4-trimethylpentyl)dithiophosphinic Acid Dissolved in Toluene

2012

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“…Data were corrected for Lorenz and polarization effects, and an absorption correction was made using psi.scan after obtaining the complete structural model. The intensity data were collected by x -2h scan mode within 4 2 ]. The structures were solved by direct methods using SHELXS 97 and refined by full-matrix least squares SHELXL 97 [9].…”

Section: X-ray Studiesmentioning

confidence: 99%

“…The dithiophosphinate (DTP) anions [R 2 PS 2 ] -can act as bidentate ligands with many transition metals to form stable chelate complexes; consequently, these sulfur ligands are suitable for solvent extraction of metals [1][2][3]. An example of such dithiophosphinates, known as CYA-NEX 301, has found use in industry for metal extraction [4][5][6].…”

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confidence: 99%

Synthesis, spectroscopic characterization and X-ray single crystal structures of trans-bis[4-methoxyphenyl (3-methylbutyl) dithiophosphinato] nickel(II) and bis [4-methoxyphenyl (3-methylbutyl) dithiophosphinato]cobalt(II) complexes

Sağlam

Çelik

Yılmaz

et al. 2010

Transition Met Chem

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Thionation of 3-methylbutylmagnesium bromide with Lawesson's Reagent (LR) gave 4-methoxyphenyl (3-methylbutyl)dithiophosphinic acid (DTPA), and the latter was converted to the ammonium salt (NH 4 L = Ammonium 4-methoxyphenyl (3-methylbutyl) dithiophosphinate). The complex, trans-bis[4-methoxyphenyl(3-methylbutyl) dithiophosphinato] nickel(II) [NiL 2 ], was prepared by the reaction of NH 4 L with NiCl 2 .6H 2 O in EtOH. Bis [4-methoxyphenyl (3-methylbutyl) dithiophosphinato]cobalt(II) [(CoL 2 ) 2 ] was also prepared in the same way. The structures of the complexes have been characterized by elemental analysis, FTIR, 1 H, 13 C, 31 P NMR and X-ray diffraction. The single crystal X-ray structures of [NiL 2 ] and [(CoL 2 ) 2 ] show that the nickel complex is square planar while the cobalt counterpart has tetrahedral coordination with a dimeric structure. Bond lengths, angles, torsion angles and dihedral angles are correlated to the structures and also compared with the literature data on similar compounds.

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Liquid–Liquid Extraction Studies of Heavy Metals (Cd, Cr and Zn) from Phosphoric Acid Solutions Using C11H18N2O as a Synthetic Agent

Berkalou,

Nounah,

Khamar

et al. 2023

Springer Proceedings in Earth and Environmental Sciences

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Cadmium(II) Extraction from Phosphoric Media bybis(2,4,4‐Trimethylpentyl)dithiophosphinic Acid (CYANEX 301)

Cited by 17 publications

References 34 publications

Correlation of the Extraction Constant Values of Zn2+ and Cd2+ from Phosphoric Acid Media by Bis(2,4,4-trimethylpentyl)dithiophosphinic Acid Dissolved in Toluene

Correlation of the Extraction Constant Values of Zn2+ and Cd2+ from Phosphoric Acid Media by Bis(2,4,4-trimethylpentyl)dithiophosphinic Acid Dissolved in Toluene

Synthesis, spectroscopic characterization and X-ray single crystal structures of trans-bis[4-methoxyphenyl (3-methylbutyl) dithiophosphinato] nickel(II) and bis [4-methoxyphenyl (3-methylbutyl) dithiophosphinato]cobalt(II) complexes

Liquid–Liquid Extraction Studies of Heavy Metals (Cd, Cr and Zn) from Phosphoric Acid Solutions Using C11H18N2O as a Synthetic Agent

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