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Cited by 17Organophosphorus compounds synthesisSurfactants and Colloidal SystemsChemical Reaction Mechanisms

Investigation of the State of Bis(2,4,4-trimethylpentyl)dithiophosphinic Acid in Nonane in the Presence of Electron-Donor Additives

Grigorieva, N. A., Pavlenko, N. I., Pashkov, G. L., Fleitlikh, I. Yu., Nikiforova, L. K.·2010·Solvent Extraction and Ion Exchange
DOI 10.1080/07366299.2010.482457
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Abstract

An IR-spectroscopy method is used to examine the state of nonane diluted bis(2,4,4-trimethylpentyl)dithiophosphinic acid (HR) in the presence of various electron-donor additives (L). Trioctyl amine (TOA), n-octanol, trioctylphosphine oxide (TOPO), tributylphosphate (TBP), and triisobutylphosphine sulfide (TIBPS) were used as additives. The formation of hydrogen bonded complexes (H-complexes) via proton transfer and a [TOAH+][R−] ion pair was shown to occur in the system containing HR and TOA. For the other additives, except n-octanol, during the formation of the H-complexes, hydrogen bonding without proton transfer takes place. In the HR and n-octanol mixture H-complexes having a structure in which the acid exhibits both proton and electron-donor properties are formed. The concentrations of the monomers (CHR ) and the activity coefficients for the dithiophosphinic acid (γ HR(tot) ) in the presence of the additives were calculated. It was shown that CHR and γ HR(tot) depend essentially on the type of additive and that their values decrease when passing from n-octanol to TOA. The strength of the interaction between HR and L decreases in the series TOA > TOPO > TBP > TIBPS > n-octanol. This series coincides with the basicity series of the additives. An antagonistic effect takes place when zinc is extracted with the HR and L mixture, where L is the trialkyl amine (TAA), the trialkyl phosphine oxide (TAPO), TBP, and n-octanol. A decrease in extraction is observed in the series TAA > TAPO > TBP > n-octanol. This series coincides with the series for decreasing HR activity in the presence of additives. Thus a decrease in the extractant activity resulting from the interaction between HR and L is the determinant factor during zinc extraction with bis(2,4,4-trimethylpentyl)dithiophosphinic acid in the presence of the electron-donor additives.

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  • Interactions can occur in synergistic extraction systems such as Cyanex 272 and Alamine 336/TEHA for separation of rare earth elements, Cyanex 301 and TOA for extraction of Co(II) and Ni(II), and Cyanex 302 and Alamine 308 for separation of Nd(III) and Zn(II).

    “For instance, interactions can occur in the following synergistic extraction systems, such as Cyanex 272 and Alamine 336 / tertiary amine (TEHA, tris-2-ethylhexylamine) for the separation of rare earth elements, Cyanex 301 and TOA for the extraction of Co(II) and Ni(II), Cyanex 302 and Alamine 308 for the separation of Nd(III) and Zn(II) [16,18-21].”

    From 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 (2020) · cites this paper as [21]

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Authors
Grigorieva, N. A., Pavlenko, N. I., Pashkov, G. L., Fleitlikh, I. Y., & Nikiforova, L. K.
Affiliations
Institute of Chemistry and Chemical Technology (RU)
Corresponding author
Grigorieva, N. A.
ORCID
Grigorieva, N. A.
Venue
Solvent Extraction and Ion Exchange
Publisher
Informa UK Limited
Published
2010-06-11
Volume
28
Issue
4
Pages
510-525
ISSN
  • 0736-6299 (ISSN-L)
  • 1532-2262
DOI
10.1080/07366299.2010.482457
OpenAlex
W1982437069
Cited by
17
References
16
Citations by year
2020: 3 · 2019: 1 · 2018: 1 · 2017: 4 · 2016: 2 · 2015: 1 · 2014: 1 · 2013: 1
FWCI
0.63
Type
journal article
Language
en
Open access
closed
Locations
Solvent Extraction and Ion Exchange (publishedVersion)
Topics
  • Physical Sciences › Chemistry › Organic Chemistry › Organophosphorus compounds synthesis
  • Physical Sciences › Chemistry › Organic Chemistry › Surfactants and Colloidal Systems
  • Physical Sciences › Chemistry › Organic Chemistry › Chemical Reaction Mechanisms
Keywords
nonane, trioctylamine, trioctylphosphine oxide, tributyl phosphate, 1-octanol, hydrogen bonding, ion pairs, activity coefficients, zinc extraction

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