Elucidation of the structures of tributyl phosphate/Li complexes in the presence of FeCl3 via UV–visible, Raman and IR spectroscopy and the method of continuous variation

Zhou, Zhiyong; Qin, Wei; Chu, Yifeng; Fei, Weiyang

doi:10.1016/j.ces.2013.07.020

Cited by 61 publications

(37 citation statements)

References 31 publications

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“…The Raman spectra of these leaching solutions are shown in Fig. 5, with all exhibiting distinct bands at 101 and 314 cm À1 that can be attributed to the vibrations of FeCl À 4 (Schauble et al, 2000;Sitze et al, 2001;Zhou et al, 2013). This indicates that the FeCl 3 remains in the same form during the entire leaching process with the decrease in the intensity of the bands reflecting the decrease in FeCl 3 concentration.…”

Section: Raman Analysis Of Leaching Solutionsmentioning

confidence: 85%

Leaching metals from saprolitic laterite ore using a ferric chloride solution

Zhang

Guo

Wei

et al. 2016

Journal of Cleaner Production

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Section: Raman Analysis Of Leaching Solutionsmentioning

confidence: 85%

Leaching metals from saprolitic laterite ore using a ferric chloride solution

Zhang

Guo

Wei

et al. 2016

Journal of Cleaner Production

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“…The Raman spectra (Fig. 12) of the leaching solution obtained with different leaching durations indicate that peaks were present at 101 and 314 cm − 1 ; these were related to FeCl 4 − (Schauble et al, 2000;Sitze et al, 2001;Zhou et al, 2013) and indicated the generation of the ion. These peaks also confirmed that the Fe\ \O bond in the goethite had been broken.…”

Section: Mineral Dissolution Behaviorsmentioning

confidence: 98%

Extraction of metals from saprolitic laterite ore through pressure hydrochloric-acid selective leaching

et al. 2015

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“…The extraction efficiency of Li(I) from brines/alkaline solutions was enhanced by the employment of neutral extractants such as TBP and MIBK dissolved in kerosene in the presence of ferric chloride (FeCl 3 ) [3,52,56,57]. In these extraction processes, FeCl 3 plays the role as a co-extracting agent, which leads to a great increase in the extraction of lithium [49].…”

Section: Hbta-topomentioning

confidence: 99%

“…In these extraction processes, FeCl 3 plays the role as a co-extracting agent, which leads to a great increase in the extraction of lithium [49]. The stepwise extraction reactions can be represented by Equations (1) and (2) [3,52,56,57]. In concentrated chloride solutions, ferric chloride exists as FeCl 4 − , which is extracted by neutral extractants to form extracted species (HFeCl 4 nL) through an ion association mechanism (see Equation (1)).…”

Section: Hbta-topomentioning

confidence: 99%

A Review on the Separation of Lithium Ion from Leach Liquors of Primary and Secondary Resources by Solvent Extraction with Commercial Extractants

Nguyen

Lee

2018

Processes

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The growing demand for lithium necessitates the development of an efficient process to recover it from three kinds of solutions, namely brines as well as acid and alkaline leach liquors of primary and secondary resources. Therefore, the separation of lithium(I) from these solutions by solvent extraction was reviewed in this paper. Lithium ions in brines are concentrated by removing other metal salts by crystallization with solar evaporation. In the case of ores and secondary resources, roasting followed by acid/alkaline leaching is generally employed to dissolve the lithium. Since the compositions of brines, alkaline and acid solutions are different, different commercial extractants are employed to separate and recover lithium. The selective extraction of Li(I) over other metals from brines or alkaline solutions is accomplished using acidic extractants, their mixture with neutral extractants, and neutral extractants mixed with chelating extractants in the presence of ferric chloride (FeCl 3 ). Among these systems, tri-n-butyl phosphate (TBP)-methyl isobutyl ketone (MIBK)-FeCl 3 and tri-n-octyl phosphine oxide (TOPO)-benzoyltrifluoroacetone (HBTA) are considered to be promising for the selective extraction and recovery of Li(I) from brines and alkaline solutions. By contrast, in the acid leaching solutions of secondary resources, divalent and trivalent metal cations are selectively extracted by acidic extractants, leaving Li(I) in the raffinate. Therefore, bis-2,4,4-trimethyl pentyl phosphinic acid (Cyanex 272) and its mixtures are suggested for the extraction of metal ions other than Li(I).

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Elucidation of the structures of tributyl phosphate/Li complexes in the presence of FeCl3 via UV–visible, Raman and IR spectroscopy and the method of continuous variation

Cited by 61 publications

References 31 publications

Leaching metals from saprolitic laterite ore using a ferric chloride solution

Leaching metals from saprolitic laterite ore using a ferric chloride solution

Extraction of metals from saprolitic laterite ore through pressure hydrochloric-acid selective leaching

A Review on the Separation of Lithium Ion from Leach Liquors of Primary and Secondary Resources by Solvent Extraction with Commercial Extractants

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