آخرین محصولات
Recovery of Indium from Secondary Resources by
A multitude of techniques to recover indium already exist, such as solvent extraction [6,15, [17] [18] [19] [20] [21] [22], liquid membrane separation [23,24], vacuum …
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Beneficiation and recovery of indium from liquid-crystal-display …
In this simulation, the process of indium recovery was advantageous from an economic and environmental point of view. Indeed, cross-current leaching allowed to concentrate indium, save reagents, and reduce the emission of CO 2 (with 10 steps we assessed that the emission of about 90 kg CO 2-Eq. could be avoided) thanks to the …
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Leaching and Selective Extraction of Indium and Tin from Zinc …
A two-step precipitation procedure was developed for the leachate solution to separate the target metals indium and tin from the main flue dust components, i.e., iron, zinc, lead, and copper. This ionometallurgical approach was compared to equivalent leaching experiments using aqueous oxalic acid solutions and other deep eutectic solvents.
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Efficient deposition of indium by cementation from
The results showed that the recovery of indium reached 99% in each step. The high indium recovery was able to ensure great economic value and practical applicability. View. Show abstract.
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A novel method for selective recovery of indium from end-of-life …
In this paper, a novel and promising solvent extraction system using crown ether as the extractant for selective recovery of indium from the leaching solution of end …
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Facile indium recovery from waste liquid crystal displays: Chloride
Indium recovery from waste LCDs is an important way to avoid possible supply constraints. Also, it was estimated that indium accounted for the third largest …
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Looking Down Under for a Circular Economy of Indium
Indium is a specialty metal crucial for modern technology, yet it is potentially critical due to its byproduct status in mining. Measures to reduce its criticality typically focus on improving its recycling efficiency at end-of-life. This study quantifies primary and secondary indium resources ("stocks") for Australia through a dynamic material-flow …
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CN103602815B
The invention discloses the method for a kind of industrialized mode recovery indium from liquid-crystal display, belong to field of waste recycle.The method comprises the steps: first to divest by the light polarizing film of stripping machine by display panels; Again display panels is crushed to the both bulk glasses plate of the ultimate range 5 ~ 200mm …
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A sustainable approach to separate and recover indium and tin …
Indium (In) can be recycled economically from used indium tin oxide (ITO) target or ITO etching solution. This study offers an efficient and simple method for …
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Materials recovery from waste liquid crystal displays: A focus on indium
Due to the low concentration of indium in the leachate, concentration techniques are strongly required; for this purpose, Rocchetti et al. (2015) applied six steps of leaching to increase indium concentration which was about 35 mg/L after the first step, almost 2-fold at the second step and about 3-fold at the fifth step. Indium recovery from ...
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Selective recovery of indium from scrap LCD panels using …
In this simulation, the process of indium recovery was advantageous from an economic and environmental point of view. Indeed, cross-current leaching allowed to concentrate indium, save reagents, and reduce the emission of CO 2 (with 10 steps we assessed that the emission of about 90 kg CO 2-Eq. could be avoided) thanks to the …
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Recovery of indium from used indium–tin oxide (ITO) targets
The results showed that the recovery of indium reached 99% in each step. The high indium recovery was able to ensure great economic value and practical applicability. Discover the world's research
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(PDF) Methods of Indium Recovery
Indium extraction is 96.1%, zinc and iron are barely extracted, and the separation factors of indium with respect to zinc and iron are3640 and 4809, respectively.
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Recovery of indium from LCD screens of discarded cell phones
The first step in development of the complete process included manual dismantling and use of a solvent bath to remove the polymeric film adhered to the glass, followed by tests of glass comminution using different mills. ... Recovery of indium from the H 2 SO 4 solution by precipitation with NH 4 OH was most satisfactory at pH 7.4, ...
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CN106319224A
The invention relates to an indium recovery method. The indium recovery method comprises the following steps: (S1) smashing and screening: an indium phosphide waste is smashed for passing through a sieve of 100 meshes; (S2) leaching: a raw material after passing through the sieve of 100 meshes and water are added according to a liquid-solid …
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CN104018186A
The invention provides a method for recovering copper, indium, gallium and selenium. The method comprises the following steps of: recovering the indium by carrying out electrolysis by taking a CIGS (Copper Indium Gallium Selenium) waste material as an anode; recovering the gallium by leaching precipitates, namely anode mud and the like, and …
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Indium Recovery – Indium Corporation's Role in …
Indium recovery refers to the salvage (extraction) of indium metal from various indium-contained products or processes that consume the material (sealing, deposition, plating, etc.). This is important as a pre …
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Innovative Method to Extract Indium from LCD Panels
3.2 Indium recovery The cross-leaching configuration with two steps allowed to obtain an indium extraction efficiency of about 100 %. This innovative method permitted to concentrate indium into the leach liquor overcoming the issue of low content of the metal in the LCD scraps, one of the principal weak points of traditional recovery processes. In
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Purification of indium by solvent extraction with undiluted …
trial processes for the successful recovery of indium from various primary and secondary sources is crucial. Possible sources of indium are by-products of zinc refining, flue dusts, slags and metallic intermediates, e-waste and impure indium (<99%).1,2 Hydrometallurgical separation methods are very suitable for extracting indium from these sources.
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Processing of indium: a review
This step results in an indium solution which is purified by employing iron to cement out the copper and arsenic, followed by cementation of lead and tin by means of indium. Cementation with aluminum allows recovery of the indium from solution. Download : Download full-size image; Fig. 1. Recovery of indium from residues.
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Optimization of indium recovery from waste crystalline silicon
Optimum operating conditions include a leaching step for 148 min at 93.2 °C in the presence of H 2 SO 4 6 mol/L with extraction rate of 95.2% and validate the feasibility with determination ... Indium recovery is preferable to produce in terms of environmental impacts and resource efficiency as a way to reduces waste and waste-related ...
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Facile indium recovery from waste liquid crystal displays: Chloride
Although it is estimated that short-term indium shortage may not occur, indium-involved product manufacturing can be significantly threatened from a long-term perspective (Werner et al., 2018, Duan et al., 2016, Valero et al., 2018). Indium recovery from waste LCDs is an important way to avoid possible supply constraints.
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CN107557596A
The present invention relates to a kind of method of recovery indium and tin element in waste liquid by acid etching, indium tin prepad fluid is formed comprising indium tin recovered liquid is mixed with the first organic solvent, and indium tin prepad fluid is mixed with the second organic solvent and the first alkaline agent and forms indium tin mixed …
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Recovery of indium from jarosite residues of zinc refinery by a
The optimal conditions for indium recovery using polymeric inclusion membranes are: stirring time of 3.1 h, a mass ratio of 1.44 (mD2HEPA/mPVC), a feeding phase pH = 3.0 and [HCl] 6.0 M in the re ...
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Purification of indium by solvent extraction with undiluted ionic
Therefore, indium is often regarded as an impurity that increases the production costs. 5 Furthermore, indium recycling is mainly limited to production scrap. To keep up with the rising demand for high-tech applications, the development of industrial processes for the successful recovery of indium from various primary and secondary …
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Recovery of Indium from Hard Zinc Slag by Pressure Leaching
Abstract. In this study, hydrometallurgical processes involving pressure acid leaching and solvent extraction were developed to aid recovery of indium from zinc slag, which is produced in the imperial smelting process. Four different acid leaching methods were studied, namely atmospheric leaching, atmospheric leaching with KMnO 4, roasting ...
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Membrane Filtration Enhanced Hydrometallurgical Recovery …
That process consists of the following steps: (1) LCD panels are disassembled and polarizing films are removed manually from the glass panel surfaces, (2) panels are crushed, (3) metals are leached from the panels in acidic conditions, (4) indium is recovered and purified from the leachate with liquid–liquid extraction, and (5) indium is ...
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Recovery of indium from LCD screens of discarded cell phones
In this simulation, the process of indium recovery was advantageous from an economic and environmental point of view. Indeed, cross-current leaching allowed to concentrate indium, save reagents, and reduce the emission of CO 2 (with 10 steps we assessed that the emission of about 90 kg CO 2-Eq. could be avoided) thanks to the …
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Novel mechanical pre-treatment methods for effective indium …
Indium recovery from the cleaned glass substrates was studied with various treatment methods: brushing, plasma, heat, and laser. The outcomes of the methods …
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A sustainable approach to separate and recover …
To examine the recovery rate of InCl 3 and SnCl 4, three parallel experiments were done and analyzed with ICP-OES, and the data are shown in Table 3. The recovery rate of indium in the whole process …
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