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Solvent Extraction of Tellurium from Chloride Solutions Using Tri-n-butyl Phosphate: Conditions and Thermodynamic Data

The extractive separation of tellurium (IV) from hydrochloric acid media with tri-n-butyl phosphate (TBP) in kerosene was investigated. The dependence on the extraction of tellurium species, concentrations of tellurium and TBP, extraction time and stage, organic/aqueous ratio, and interferences from...

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Autores principales: Li, Dongchan, Guo, Yafei, Deng, Tianlong, Chen, Yu-Wei, Belzile, Nelson
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3976803/
https://www.ncbi.nlm.nih.gov/pubmed/24757422
http://dx.doi.org/10.1155/2014/458705
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author Li, Dongchan
Guo, Yafei
Deng, Tianlong
Chen, Yu-Wei
Belzile, Nelson
author_facet Li, Dongchan
Guo, Yafei
Deng, Tianlong
Chen, Yu-Wei
Belzile, Nelson
author_sort Li, Dongchan
collection PubMed
description The extractive separation of tellurium (IV) from hydrochloric acid media with tri-n-butyl phosphate (TBP) in kerosene was investigated. The dependence on the extraction of tellurium species, concentrations of tellurium and TBP, extraction time and stage, organic/aqueous ratio, and interferences from coexist metallic ions were examined and are discussed. Besides, the stripping agent and stripping time were also studied. It was found that the extraction reaction corresponds to the neutral complex formation mechanism and the extracted species is TeCl(4) ·3TBP and that the extraction process is exothermic. The thermodynamic parameters of enthalpy (ΔH), entropy (ΔS), and free energy (ΔG) of the extraction process were evaluated at −26.2 kJ·mol(−1), −65.6 J·mol(−1) ·K(−1), and −7.0 kJ·mol(−1), respectively at 293 K.
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spelling pubmed-39768032014-04-22 Solvent Extraction of Tellurium from Chloride Solutions Using Tri-n-butyl Phosphate: Conditions and Thermodynamic Data Li, Dongchan Guo, Yafei Deng, Tianlong Chen, Yu-Wei Belzile, Nelson ScientificWorldJournal Research Article The extractive separation of tellurium (IV) from hydrochloric acid media with tri-n-butyl phosphate (TBP) in kerosene was investigated. The dependence on the extraction of tellurium species, concentrations of tellurium and TBP, extraction time and stage, organic/aqueous ratio, and interferences from coexist metallic ions were examined and are discussed. Besides, the stripping agent and stripping time were also studied. It was found that the extraction reaction corresponds to the neutral complex formation mechanism and the extracted species is TeCl(4) ·3TBP and that the extraction process is exothermic. The thermodynamic parameters of enthalpy (ΔH), entropy (ΔS), and free energy (ΔG) of the extraction process were evaluated at −26.2 kJ·mol(−1), −65.6 J·mol(−1) ·K(−1), and −7.0 kJ·mol(−1), respectively at 293 K. Hindawi Publishing Corporation 2014-03-16 /pmc/articles/PMC3976803/ /pubmed/24757422 http://dx.doi.org/10.1155/2014/458705 Text en Copyright © 2014 Dongchan Li et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Li, Dongchan
Guo, Yafei
Deng, Tianlong
Chen, Yu-Wei
Belzile, Nelson
Solvent Extraction of Tellurium from Chloride Solutions Using Tri-n-butyl Phosphate: Conditions and Thermodynamic Data
title Solvent Extraction of Tellurium from Chloride Solutions Using Tri-n-butyl Phosphate: Conditions and Thermodynamic Data
title_full Solvent Extraction of Tellurium from Chloride Solutions Using Tri-n-butyl Phosphate: Conditions and Thermodynamic Data
title_fullStr Solvent Extraction of Tellurium from Chloride Solutions Using Tri-n-butyl Phosphate: Conditions and Thermodynamic Data
title_full_unstemmed Solvent Extraction of Tellurium from Chloride Solutions Using Tri-n-butyl Phosphate: Conditions and Thermodynamic Data
title_short Solvent Extraction of Tellurium from Chloride Solutions Using Tri-n-butyl Phosphate: Conditions and Thermodynamic Data
title_sort solvent extraction of tellurium from chloride solutions using tri-n-butyl phosphate: conditions and thermodynamic data
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3976803/
https://www.ncbi.nlm.nih.gov/pubmed/24757422
http://dx.doi.org/10.1155/2014/458705
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