Degradation of organothiophosphorous extractant Cyanex 301

Wieszczycka, Karolina; Tomczyk, Wiktoria

doi:10.1016/j.jhazmat.2011.05.045

Cited by 26 publications

(13 citation statements)

References 25 publications

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“…Equilibrium constant log b b-diketones extractants as well as with Cyanex 301 can be oxidized to the trivalent state in the presence of air [30][31][32][33][34][35]. In the presented studies the reaction of the oxidation seems also be observed, especially a characteristic dark brown colour of the organic phase has suggested the reaction occurrence.…”

Section: Reactionmentioning

confidence: 76%

Equilibrium and mechanism of cobalt(II) extraction from chloride solution by hydrophobic 2-pyridineketoxime

Wieszczycka

Wojciechowska

Krupa

2015

Separation and Purification Technology

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Section: Reactionmentioning

confidence: 76%

Equilibrium and mechanism of cobalt(II) extraction from chloride solution by hydrophobic 2-pyridineketoxime

Wieszczycka

Wojciechowska

Krupa

2015

Separation and Purification Technology

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“…The decomposition of Cyanex 301 results in the formation of Cyanex 302 as an intermediate product which is finally oxidized to Cyanex 272 [60]. Wieszczycka and Tomczyk also agreed that Cyanex 301 decomposed into two stage processes as follows: (i) reversible process-the formation of disulfide and (ii) irreversible process-the decomposition of disulfide to Cyanex 272 and elemental sulfur [61]. *Denote.…”

Section: Effect Of Aciditymentioning

confidence: 98%

Review on the Comparison of the Chemical Reactivity of Cyanex 272, Cyanex 301 and Cyanex 302 for Their Application to Metal Separation from Acid Media

Nguyen

Lee

2020

Metals

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Cyanex extractants, such as Cyanex 272, Cyanex 301, and Cyanex 302 have been commercialized and widely used in the extraction and separation of metal ions in hydrometallurgy. Since Cyanex 301 and Cyanex 302 are the derivatives of Cyanex 272, these extractants have similar functional groups. In order to understand the different extraction behaviors of these extractants, an understanding of the relationship between their structure and reactivity is important. We reviewed the physicochemical properties of these extractants, such as their solubility in water, polymerization degree, acidity strength, extraction performance of metal ions, and the interaction with diluent and other extractants on the basis of their chemical structure. Synthetic methods for these extractants were also introduced. This information is of great value in the synthesis of new kinds of extractants for the extraction of metals from a diverse medium. From the literature, the extraction and stripping characteristics of metals by Cyanex 272 and its derivatives from inorganic acids such as HCl, H2SO4, and HNO3 were also reviewed. The replacement of oxygen with sulfur in the functional groups (P = O to P = S group) has two opposing effects. One is to enhance their acidity and extractability due to an increase in the stability of metal complexes, and the other is to make the stripping of metals from the loaded Cyanex 301 difficult.

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“…15,61 Cyanex 301 and Cyanex 302 are preferred for cobalt separation from manganese-containing solutions, but these extractants are not stable and were therefore not considered in this paper. 62,63 The developed material would be similar to the commercially available Lewatit® TP 272, which is also a Cyanex 272 impregnated resin. 64 In contrast to the polystyrene-based Lewatit TP 272, which is manufactured from fossil fuels, AC-ALG is a resin derived from renewable sources.…”

Section: Introductionmentioning

confidence: 99%

Recovery of cobalt from dilute aqueous solutions using activated carbon–alginate composite spheres impregnated with Cyanex 272

et al. 2019

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A novel adsorbent was designed for selective recovery of cobalt(II) from synthetic binary cobalt(II)-nickel(II) and cobalt(II)-manganese(II) solutions, a synthetic multi-element solution and a real aqueous waste stream from the petrochemical sector. The adsorbent consisted of shaped activated carbon-alginate spheres impregnated with Cyanex 272. The synthesis was followed by characterisation using SEM, infrared spectroscopy, BET analysis and elemental analysis. Good selectivity for cobalt(II) over nickel(II) could be achieved during adsorption, while this was not the case for cobalt(II) over manganese(II). Cobalt(II) and manganese(II) were therefore fully adsorbed and stripped using a dilute sulphuric acid solution. The adsorbent was shown to be reusable in a column setup. Finally, the adsorbent material was used for the purification of a real aqueous waste stream from the petrochemical sector.

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Degradation of organothiophosphorous extractant Cyanex 301

Cited by 26 publications

References 25 publications

Equilibrium and mechanism of cobalt(II) extraction from chloride solution by hydrophobic 2-pyridineketoxime

Equilibrium and mechanism of cobalt(II) extraction from chloride solution by hydrophobic 2-pyridineketoxime

Review on the Comparison of the Chemical Reactivity of Cyanex 272, Cyanex 301 and Cyanex 302 for Their Application to Metal Separation from Acid Media

Recovery of cobalt from dilute aqueous solutions using activated carbon–alginate composite spheres impregnated with Cyanex 272

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