Solvent Extraction of Th(IV) and Eu(III) Ions by 3,5-di-<i>tert</i>-butyl-2-Hydroxy-Benzaldehyde Oxime from Aqueous Chloride Media

Sehati, Negar; Shiri-Yekta, Zahra; Zamani, Abbasali; Yaftian, Mohammad Reza; Noshiranzadeh, Nader

doi:10.1080/01496395.2011.629399

Cited by 10 publications

(2 citation statements)

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“…In this case, the former is extracted as a 2 : 1 complex, [Pd(L) n ], at pH Z 3.0 whilst the kinetic inertness of Pt(IV) ensures that it is only loaded very slowly and so remains in the aqueous phase. 16 Extraction of Mo(VI) and U(VI) by the aliphatic reagent, 5,8-diethyl-7-hydroxydodecan-6-one oxime (LIX 63), has been shown to involve the complexation of the metal cation MO 18 The presence of both the extractant anion (L À ) and an anion from the aqueous feed solution (chloride) indicates that these latter extractions do not proceed by the simple cation exchange process shown in eqn 3, but display characteristics of the metal salt extraction processes (see below).…”

Section: Metal Cation Extractionmentioning

confidence: 99%

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Solvent extraction: the coordination chemistry behind extractive metallurgy

et al. 2014

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The modes of action of the commercial solvent extractants used in extractive hydrometallurgy are classified according to whether the recovery process involves the transport of metal cations, M(n+), metalate anions, MXx(n-), or metal salts, MXx into a water-immiscible solvent. Well-established principles of coordination chemistry provide an explanation for the remarkable strengths and selectivities shown by most of these extractants. Reagents which achieve high selectivity when transporting metal cations or metal salts into a water-immiscible solvent usually operate in the inner coordination sphere of the metal and provide donor atom types or dispositions which favour the formation of particularly stable neutral complexes that have high solubility in the hydrocarbons commonly used in recovery processes. In the extraction of metalates, the structures of the neutral assemblies formed in the water-immiscible phase are usually not well defined and the cationic reagents can be assumed to operate in the outer coordination spheres. The formation of secondary bonds in the outer sphere using, for example, electrostatic or H-bonding interactions are favoured by the low polarity of the water-immiscible solvents.

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Section: Metal Cation Extractionmentioning

confidence: 99%

“…17 ] in the water-immiscible phase. 18 The presence of both the extractant anion (L À ) and an anion from the aqueous feed solution (chloride) indicates that these latter extractions do not proceed by the simple cation exchange process shown in eqn ( 3), but display characteristics of the metal salt extraction processes (see below).…”

Section: Oxime Extractantsmentioning

confidence: 99%