Synergistic Solvent Extraction of Neodymium(III) from Chloride Solutions using a Mixture of Triisooctylamine and bis(2,4,4-Trimethylpentyl) Monothiophosphinic Acid

Kumar, B. Nagaphani; Reddy, B. Ramachandra; Kantam, M. Lakshmi; Kumar, J. Rajesh; Lee, Jin Young

doi:10.1080/01496395.2013.836673

Cited by 40Extraction and Separation ProcessesRadioactive element chemistry and processingChemical and Physical Properties in Aqueous Solutions

Synergistic Solvent Extraction of Neodymium(III) from Chloride Solutions using a Mixture of Triisooctylamine and bis(2,4,4-Trimethylpentyl) Monothiophosphinic Acid

Kumar, B. Nagaphani, Reddy, B. Ramachandra, Kantam, M. Lakshmi, Kumar, J. Rajesh, Lee, Jin Young·2014·Separation Science and Technology

DOI 10.1080/01496395.2013.836673

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Abstract

The synergistic solvent extraction of Neodymium(III) with mixture of triisooctylamine (Alamine 308, R3N) and bis(2,4,4-trimethylpentyl) monothiophosphinic acid (Cyanex 302, (HX)2) in kerosene from chloride solutions has been investigated. A significant synergistic effect was found by the addition of Cyanex 302 to Alamine 308. The synergistic enhancement coefficient was calculated to be 44.1 for Nd at a mole fraction of 0.2 of Cyanex 302 in the mixture. Results of the effect of equilibrium pH on the distribution ratio of Nd suggested two moles of H+ released in the extraction of Nd with a mixture of extractants. The effect of variation of one extractant at a fixed concentration of the other extractant has been carried out in order to determine the extracted species as NdClX2.2 R3N. The endothermic nature of extraction with the mixture of extractants was confirmed by the temperature effect and thermodynamic parameters ΔH, ΔG, and ΔS were calculated.

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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 [20]

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Authors: Kumar, B. N., Reddy, B. R., Kantam, M. L., Kumar, J. R., & Lee, J. Y.
Affiliations: Indian Institute of Chemical Technology (IN)
Korea Institute of Geoscience and Mineral Resources (KR)
Corresponding author: Lee, Jin Young
ORCID: Kantam, M. Lakshmi
Lee, Jin Young
Venue: Separation Science and Technology
Publisher: Informa UK Limited
Published: 2013-12-11
Volume: 49
Issue: 1
Pages: 130-136
ISSN: 0149-6395 (ISSN-L)
1520-5754
DOI: 10.1080/01496395.2013.836673
OpenAlex: W2073651596
Cited by: 40
References: 32
Citations by year: 2026: 1 · 2025: 1 · 2024: 1 · 2023: 3 · 2021: 2 · 2020: 7 · 2019: 1 · 2018: 1 · 2017: 4 · 2016: 7 · 2015: 6 · 2014: 5 · 2013: 1
FWCI: 8.40
Type: journal article
Language: en
Open access: closed
Locations: Separation Science and Technology (publishedVersion)
Topics: Physical Sciences › Engineering › Mechanical Engineering › Extraction and Separation Processes
Physical Sciences › Chemistry › Inorganic Chemistry › Radioactive element chemistry and processing
Physical Sciences › Chemical Engineering › Filtration and Separation › Chemical and Physical Properties in Aqueous Solutions
Keywords: neodymium(III), solvent extraction, synergistic extraction, triisooctylamine, Cyanex 302, chloride solutions, kerosene, distribution ratio, equilibrium pH, extraction thermodynamics

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Synergistic Solvent Extraction of Neodymium(III) from Chloride Solutions using a Mixture of Triisooctylamine and bis(2,4,4-Trimethylpentyl) Monothiophosphinic Acid

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