Thermodynamics of extraction of Re O−4 from aqueous sulfuric acid media with Tri-n-butyl phosphate dissolved in kerosene

This review addresses the dearth of knowledge about the interaction of rhenium species with organic solvents during the liquid–liquid extraction of rhenium. To describe such interactions, the aqueous chemistry of rhenium in unlike media, the extraction mechanism and the salient role of thermodynamic properties are also discussed. Formation of a rhenium‐complexed species inorganic phase and competition between the extracted species during extraction is described by inner and outer sphere coordination. Emergence of a stabilized complex in a hydrophobic environment is greatly affected by the interaction of electrostatic and/or H‐bonding. The chemistry of liquid–liquid extraction of rhenium that can further assist future studies in this area is also relevant to other metal ion systems. © 2015 Society of Chemical Industry

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“…The relationship of distribution factor as a function of temperature can be derived as shown below:

\ln D_{M} = prefix- \frac{Δ H °_{italicapp .}}{R T} + \frac{Δ S °_{italicapp .}}{R} + a \ln ([], A) + s \ln ([], S)

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Section: Correlation Of Extraction Thermodynamics With Rhenium Complementioning

confidence: 99%

Complexation chemistry in liquid–liquid extraction of rhenium

Srivastava

Lee

Kim

2015

J of Chemical Tech & Biotech

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“…50 In kerosene, rhenium is extracted via the formation of HReO 4 Á4TBP species. 51 See also the extraction studies on HReO 4 , HClO 4 and HAuCl 4 by the phosphine oxide (TOPO) analogue of TBP. 52 In such studies (see also ref.…”

Section: Acid Extractionmentioning

confidence: 99%

Acid extraction to a hydrophobic ionic liquid: the role of added tributylphosphate investigated by experiments and simulations

Gaillard

Mazan

Georg

et al. 2012

Phys. Chem. Chem. Phys.

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We have studied the extraction of four HA acids (HNO(3), HReO(4), HClO(4), HCl) to a hydrophobic ionic liquid (IL) 1-butyl-3-methylimidazolium-bis(trifluoromethanesulfonyl)amide (BMI(+) Tf(2)N(-)) at room temperature, in a wide range of acidic concentrations in water. The effect of tributylphosphate (TBP) as co-solvent is investigated. According to experimental observations, water dragging to the IL phase increases with added TBP and/or acids. Acid extraction is found to be weak, however, for the four acids except for concentrated HNO(3) (>3 M). Molecular dynamics simulations on model biphasic systems show that TBP is not surface active, but well dissolved in the IL. They also reveal the importance of HA acid model (either totally or half dissociated) and of the TBP content on acid extraction to the IL. Furthermore, they show that "the proton" can be extracted by TBP (H(3)O(+)(TBP)(3)"complex") without its A(-) conjugated base, via a cation transfer mechanism (BMI(+) transfer to water). Experiments and simulations show that TBP plays an important role in the mutual solubility between water and ionic liquid, by different amounts, depending on the HA acid. On the other hand, both approaches indicate that a HTf(2)N containing aqueous solution completely mixes with the [BMI][Tf(2)N] IL that contains the same Tf(2)N(-) anion.

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Study on synthesis and adsorption properties of ReO4− ion imprinted polymer

Zhang

Jia

et al. 2020

J Polym Res

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Thermodynamics of extraction of Re O−4 from aqueous sulfuric acid media with Tri-n-butyl phosphate dissolved in kerosene

Cited by 11 publications

References 25 publications

Complexation chemistry in liquid–liquid extraction of rhenium

Complexation chemistry in liquid–liquid extraction of rhenium

Acid extraction to a hydrophobic ionic liquid: the role of added tributylphosphate investigated by experiments and simulations

Study on synthesis and adsorption properties of ReO4− ion imprinted polymer

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