Investigation of intermolecular interactions of mixed extractants of quaternary phosphonium or ammonium chlorides and bis(2,4,4-ethylhexyl)phosphoric acid for metal separation

Li, Ya; Hu, Jiugang; Fu, Mingbo; Tang, Jianguo; Dong, Lixin; Liu, Shijun

doi:10.1039/c6ra07813c

Cited by 12 publications

(7 citation statements)

References 44 publications

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“…The densities of mixtures A, C and E decrease with mole fraction of extractants because the densities of Aliquat and TOA are less than either of the vegetable oils. At room temperature, Aliquat is an ionic liquid 10,62 that consists of quaternary ammonium cation and chloride anion. As the concentration of Aliquat increases in mixtures A and C, the number of ions increases as well.…”

Section: Resultsmentioning

confidence: 99%

Spectroscopic, thermodynamic and ultrasonic properties of pseudo‐binary mixtures of organic extractants and vegetable oil at 25–60°C under atmospheric pressure

Sarkar

Mondal

Beriya

et al. 2021

Asia-Pacific J Chem Eng

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This work is intended to investigate the molecular interactions and transport properties of five pseudo‐binary mixtures of various combinations of vegetable oils (sesame oil and sunflower oil) and organic extractants (Aliquat 336, TBP, D2EHPA and TOA) by determining their surface tension, density and viscosity over a temperature range of 25–60°C at atmospheric pressure. The experimental data are fitted into various literature models. Information on excess molar volume and viscosity deviation leads to an understanding of solute–solvent interactions. Further, the ultrasonic velocity, isentropic compressibility, intermolecular free length, specific impedance, apparent molar volume, volumetric thermal expansion coefficient, excess Gibbs' free energy, change in enthalpy of mixing and entropy of activation of the liquids have been calculated. A model relating the surface tension, density and viscosity of the pseudo‐binary mixtures has been proposed in this paper. Analysis of Fourier transform infrared (FTIR) studies has further illustrated the intermolecular interactions in the pseudo‐binary mixtures.

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Section: Resultsmentioning

confidence: 99%

Spectroscopic, thermodynamic and ultrasonic properties of pseudo‐binary mixtures of organic extractants and vegetable oil at 25–60°C under atmospheric pressure

Sarkar

Mondal

Beriya

et al. 2021

Asia-Pacific J Chem Eng

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“…In another aspect, the structure of the amine and the acidic extractants can be changed in their mixtures when an interaction occurs and the formation of adducts has a certain effect on the metal extraction [1,21]. According to Liu et al, three kinds of interaction may occur between acidic and amine extractant such as (i) ion pair (R 3 NH + A − ), (ii) hydrogen bonding (R 3 NH-A), and (iii) binding which has an intermediate characteristic as represented by the location of the proton [5].…”

Section: Effect Of Interactions Of the Components In Mixture On Co(ii) Extractionmentioning

confidence: 99%

“…The evident difference in extraction percentage of the mixture of D2EHPA and Alamine 336/Aliquat 336 at 0.5 M mixture can be explained by two reasons. First, ILs can form in the mixture of D2EHPA and Aliquat 336 and the presence of ILs affects the interaction between the components in the mixture [21]. When the mole fraction of ILs formed in the mixture is low, ion-dipole interaction between the chloride ion of Aliquat 336 and D2EHPA as well as hydrogen bond between D2EHPA and IL can occur [8,21].…”

Section: Effect Of Mole Fraction Of D2ehpa and Mixture Concentration On Co(ii) Extractionmentioning

confidence: 99%

“…First, ILs can form in the mixture of D2EHPA and Aliquat 336 and the presence of ILs affects the interaction between the components in the mixture [21]. When the mole fraction of ILs formed in the mixture is low, ion-dipole interaction between the chloride ion of Aliquat 336 and D2EHPA as well as hydrogen bond between D2EHPA and IL can occur [8,21]. In addition, a kind of interaction such as [Cl] − /[HA]/[R 4 N + ] in which D2EHPA (HA) was kept between the ion pair of chloride anions and ammonium cations, might act against metal extraction [8,21].…”

Section: Effect Of Mole Fraction Of D2ehpa and Mixture Concentration On Co(ii) Extractionmentioning

confidence: 99%

“…According to previous works [20,21], ILs can form when D2EHPA and Aliquat 336 are mixed at a specific composition. However, this prediction was only based on the variation of physical properties of mixture with composition and the shift of characteristic peaks on the spectra such as FT-IR (Fourier-transform infrared spectroscopy), ATR-IR (Attenuated total reflection infrared spectroscopy), and NMR (Nuclear magnetic resonance spectroscopy).…”

Section: Introductionmentioning

confidence: 98%

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Comparison of Extraction Ability between a Mixture of Alamine 336/Aliquat 336 and D2EHPA and Ionic Liquid ALi-D2 from Weak Hydrochloric Acid Solution

Nguyen

Lee

2020

Metals

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The development of extraction systems to improve the extraction efficiency of metals using commercial extractants and ionic liquids is of importance. The extraction behavior of Co(II) between mixture of Alamine 336/Aliquat 336 and D2EHPA and synthesized ionic liquid ALi-D2 was compared in this work. Some factors, such as equilibrium pH, properties of the extractants, and concentration of components in the mixture had a remarkable effect on the extraction of Co(II). The interactions occurring in the mixtures as well as the change in solution pH were analyzed. Co(II) was completely extracted by ionic liquid when equilibrium pH was higher than 6.5, while it was difficult to extract Co(II) by employing the mixture of D2EHPA and Alamine 336/Aliquat 336. The formation of ionic liquid in the mixture of D2EHPA and Aliquat 336 was verified through FT-IR spectra. In addition, the competition extraction of hydrogen ion and Co(II) by ionic liquid ALi-D2 was explained. Among the three kinds of extractants, the ionic liquid showed the best extraction efficiency for Co(II) and pH control from weak acidic solutions. The present study provides valuable information on the extraction behavior of metal ion by the mixtures of commercial extractants, and thus can give some light on the development of metal extraction systems.

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Effect of phosphonium‐based ionic liquids on the structuration and physical properties of LIonomers

Hou,

Gérard,

Livi

et al. 2023

J of Applied Polymer Sci

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In this study, LIonomers families based on phosphonium ILs have been successfully developed. These LIonomers are designed from the combination of various phosphonium‐based ionic liquids (PhILs) with different counter anions including tetradecyl (trihexyl) phosphonium bis (2,4,4‐trimethylpentyl) phosphinate (P+TMP), tributyl (ethyl) phosphonium diethyl phosphate (P+DEP), trihexyl (tetradecyl) phosphonium chloride (P+Cl) and trihexyl (tetradecyl) phosphonium acetate (P+Ac). Here, the interactions between maleic anhydride groups (MA) of the maleic anhydride‐grafted polypropylene (PPgMA) and PhILs within LIonomers have been investigated by NMR, whose intensity depends on the chemical nature of cation/anion pairs. Then, viscosity in the molten state was considered as a probe of the interaction intensity between polar groups of grafted polypropylenes and the phosphonium cation. The proper one can be tuned from the nature (P+TMP vs. P+Ac vs. P+Cl), from the steric hindrance, that is, relevant to the conformation of PhILs (P+DEP vs. P+TMP / P+Ac / P+Cl), and by MA content, as well as the extent of generated ionic chains from polar groups of matrices as “head” and associated anion/cation pairs. The effect of these generated ionic interactions on crystallization process and mechanical properties had been also investigated by DSC in non‐isothermal conditions, and tensile tests. Depending of the steric hindrance of the phosphonium ILs playing a key role on the interactions with PPgMA chains, an increase of the ductility versus a plasticizing effect can be obtained as function of the targeted applications.

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Investigation of intermolecular interactions of mixed extractants of quaternary phosphonium or ammonium chlorides and bis(2,4,4-ethylhexyl)phosphoric acid for metal separation

Abstract: The adjustable intermolecular interactions of mixed extractants to improve metal separation.

Cited by 12 publications

References 44 publications

Spectroscopic, thermodynamic and ultrasonic properties of pseudo‐binary mixtures of organic extractants and vegetable oil at 25–60°C under atmospheric pressure

Spectroscopic, thermodynamic and ultrasonic properties of pseudo‐binary mixtures of organic extractants and vegetable oil at 25–60°C under atmospheric pressure

Comparison of Extraction Ability between a Mixture of Alamine 336/Aliquat 336 and D2EHPA and Ionic Liquid ALi-D2 from Weak Hydrochloric Acid Solution

Effect of phosphonium‐based ionic liquids on the structuration and physical properties of LIonomers

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