Indium recovery from acidic aqueous solutions by solvent extraction with D2EHPA: a statistical approach to the experimental design

Fortes, M.C.B.; Martins, Afonso Henriques; Benedetto, J.S.

doi:10.1590/s0104-66322003000200005

Cited by 18 publications

(10 citation statements)

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“…Thus, many studies have been carried out to recover valuable material from scrap LCD screens. Most studies have concentrated on hydrometallurgical methods (Hsieh et al, 2009) such as acid dissolution or acid leaching (Li et al, 2009;Li et al, 2011;Gabriel et al, 2017a;Gabriel et al, 2017b), solvent extraction (Fortes et al, 2003;Honma and Muratani, 2005) and chlorination (Park et al, 2009) methods. However, those studies require the need for wastewater treatment after recovering the metals.…”

Section: Introductionmentioning

confidence: 99%

Application of Sub-Critical Water for Recovery of Tin and Glass Substrates From LCD Panel E-Waste

Yoshida

Izhar

Nishio³

et al. 2018

Detritus

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Tin and transparent glass substrate were efficiently recovered from color filter (CF) and thin-film transistor (TFT) glasses in LCD panel wastes using sub-critical water (sub-CW) at various treatment temperatures and reaction time. Treatment for 5 min using sub-CW added with NaOH resulted in a 95% recovery of tin from CF and TFT glasses. The tin oxide did not liquify in the liquid phase instead stayed in the organic multi-layers, which exfoliated together from the CF glass and TFT glass. This is a huge advantage because the organic multi-layers were readily separated by sub-CW and tin was recovered by filtration with ease. Transparent and clean glass was also recovered from LCD panel waste. The amount of tin oxide recovered depended on the sub-CW reaction temperature, reaction time and NaOH concentration. Treatment of smaller CF glass improved the recovery of tin. With this advance, we have showed that sub-CW method is technically feasible for tin oxide recovery in LCD waste.

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Section: Introductionmentioning

confidence: 99%

Application of Sub-Critical Water for Recovery of Tin and Glass Substrates From LCD Panel E-Waste

Yoshida

Izhar

Nishio³

et al. 2018

Detritus

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“…Fortes et al . indicated that lower diluent volume in the organic phase resulted in less oxidation of ferrous ions.…”

Section: Introductionmentioning

confidence: 99%

“…Rezaei and Nedjate [33] reported that when diluents with lower dielectric constants were used, a more selective extraction of the metal from acidic solution could be achieved. Fortes et al [27] indicated that lower diluent volume in the organic phase resulted in less oxidation of ferrous ions.…”

Section: Introductionmentioning

confidence: 99%

Recovery of indium from the etching solution of indium tin oxide by solvent extraction

Chou

Shen

Yang

et al. 2016

Env Prog and Sustain Energy

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The etching waste solution from the indium-consuming fabrication processes is considered as the viable resource for indium recovery. The extraction equilibrium of indium(III) from a hydrochloride acid solution using di-(2-ethylhexyl) phosphoric acid (D2EHPA) as an extractant and dissolved in kerosene by solvent extraction was studied. To optimize the extraction and separation of indium from etching waste solution, the effects of O/A ratio, pH, and extractant concentration on the distribution ratios of In(III) and selective precipitation of alumina, cerium, and iron from indium were also investigated in this work. The experimental results showed that satisfactory separation of alumina, cerium, and iron from indium was achieved with 0.3 M D2EHPA at room temperature and pH values ranging from 1 to 1.5. In this process, 92% of indium could be extracted from 0.74 to 8.62 g/L at an O/A ratio of 1:1. Quantitative stripping experiments of indium by HCl showed that the preferred O/A phase ratio was 1:2 or less at HCl concentration of 2.0 M to attain a high indium recovery and minimum iron coextraction. Where maximum purity is desired, the extraction is desirably carried out in three theoretical extraction stages. Based on these results, the aqueous and organic phase parameters can be easily manipulated to attain a high separation efficiency of indium(III) from commonly associated elements.

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“…Solvent extraction [7,8], hydrometallurgical [9] and chlorination [10,11] methods have also been reported to recover ITO from etching solutions or target. However, due to complications in the above processes, a simpler treatment method by means of sub-critical water (hereafter called sub-CW) technology was initiated by our group [12].…”

Section: Introductionmentioning

confidence: 99%

Recovery of indium from TFT and CF glasses of LCD wastes using NaOH-enhanced sub-critical water

Yoshida¹,

Izhar²,

Nishio³

et al. 2015

The Journal of Supercritical Fluids

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Indium recovery from acidic aqueous solutions by solvent extraction with D2EHPA: a statistical approach to the experimental design

Cited by 18 publications

References 0 publications

Application of Sub-Critical Water for Recovery of Tin and Glass Substrates From LCD Panel E-Waste

Application of Sub-Critical Water for Recovery of Tin and Glass Substrates From LCD Panel E-Waste

Recovery of indium from the etching solution of indium tin oxide by solvent extraction

Recovery of indium from TFT and CF glasses of LCD wastes using NaOH-enhanced sub-critical water

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