copper leaching in hcl acid
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copper leaching in hcl acid

Leaching behavior of copper using electro-generated ...

2010-1-1  We have been investigating the leaching of copper from waste printed circuit boards using electro-generated chlorine in hydrochloric acid solution (Kim et al., 2005, Kim et al., 2008a, Kim et al., 2008b). In our study, the electro-generation of chlorine and leaching of copper proceed simultaneously in the anode compartment of the electrolytic cell.

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Selective Copper Recovery with HCl Leaching from

2020-2-27  In this study, the recovery conditions of copper with HCl leaching obtained from the leaching of chalcopyrite concentrate in the presence of hydrogen peroxide and oxalic acid were investigated. The effects of various leaching parameters (HCl concentration (1–9 M), leaching temperature (298–328 K), leaching time (5–300 min), and liquid–solid ratio (5–100 ml/g)) on metal extraction were studied.

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Leaching kinetics of copper from waste printed circuit ...

2011-6-1  kinetics of copper. This study examines the leaching of copper and various metals from waste PCBs, especially copper, using the electro-generated chlorine in hydrochloric acid solution by employing two different reactors: (a) a combined reactor facilitated with simultaneous Cl 2 generation and metal leaching which can circulate and reuse chloride

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Dissolution of copper from smelting slag by leaching in ...

2017-10-29  et al. [11] studied leaching of copper slag with hydrochloric acid. They were able to dissolve as much as 91% of the copper from the slag with 35% HCl at 80-90 oC. However, these extreme conditions also resulted in almost complete dissolution of iron (i.e., 99%). For this reason, in the present work, the effect of temperature on metal dissolution was not

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Leaching of copper oxide with different acid solutions ...

2009-10-15  Copper composition was checked after that by atomic absorption. The obtained powder was crushed into particle size of 80 μm. H 2 SO 4 (96–98%, Biochem), HNO 3 (60%, Cheminova), HCl (37%, Carlo Erba) and citric acid monohydrate (C 6 H 8 O 7, 99%, Alfa Aesar) were used as leaching reagents.

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INVESTIGATION OF COPPER(I) SULPHIDE LEACHING IN

2019-11-19  leachant for copper sulphides and the advantages of using mixed chloride-sulphate acid leachants for chalcocite-type minerals were recognised. Cho [8] investigated leaching of chalcocite in hypochlorous acid and found that the leaching rate was pH dependent. The Broken Hill Associated Smelters (BHAS) in Port Pirie, South Australia [9], developed a

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Selective Copper Recovery by Acid Leaching from Printed ...

2020-2-23  Selective copper leaching was achieved with all the acids studied, including HCl, HNO3, and H2SO4. The lower concentration of acid solutions resulted in a larger difference in leachabilities between Cu and Fe. Among three leachates, the H 2SO4 solution performed effectively on the selective leaching of Cu and Fe. Adjusting the pulp density to

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Extraction of Tin and Copper by Acid Leaching of PCBs

2013-2-2  Copper existing in the solder forms a precipitate of copper nitrate, while that of the middle layer of the boards does not expose to nitric acid solution at the beginning reaction stage. It just reacts when the soldering-tin completely reacts with nitric acid solution. Therefore, copper in the middle layer almost did not leach out by controlling the concentration of nitric acid and the immersed time. The

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LEACHING OF A Cu-CoORE FROM CONGO USING

2013-7-23  leachability of Cu and Co using sulphuric acid and hydrogen peroxide mixtures at different conditions. Without hydrogen peroxide, the maximum extraction of copper and cobalt were found to be ~80% and ~15%, respectively when the acid concentration was varied between 0.36 – 1.1M. When hydrogen peroxide was added (0.008-0.042M), Cu recovery was

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Leaching behavior of copper using electro-generated ...

Leaching behavior of copper using electro-generated chlorine was investigated in hydrochloric acid solutions. When leached copper concentration was lower than 3.6g/L, the utilization efficiency of the electro-generated chlorine was close to 100% at , 400 rpm in 1M HCl solutions. The concentration ot the leached copper over 3.6g/L caused the electrode potential to drop quietly, leading to a ...

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Leaching kinetics of copper from waste printed circuit ...

2011-6-1  Leaching kinetics of copper from waste printed circuit boards by electro-generated chlorine in HCl solution Eun-young Kima, Min-seuk Kimb, Jae-chun Leeb,⁎, Jinki Jeongb, B.D. Pandeyb,c a Dept. Material Science Engineering, Pennsylvania State University, University Park 16802, PA, United States b Mineral Resources Research Division, Korea Institute of Geoscience Mineral Resources (KIGAM ...

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Selective Copper Recovery by Acid Leaching from Printed ...

2020-2-23  Selective copper leaching was achieved with all the acids studied, including HCl, HNO3, and H2SO4. The lower concentration of acid solutions resulted in a larger difference in leachabilities between Cu and Fe. Among three leachates, the H 2SO4 solution performed effectively on the selective leaching of Cu and Fe. Adjusting the pulp density to

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Structural Equation Modelling the leaching of oxidised ...

of operating variables (pH, time, temperature and stirring speed) on the relative leaching yields of Cu, Co, Ni and Fe during the leaching of an oxidised copper-cobalt ore sample in an HCl aqueous solution. The gangue acid consumption was also measured to aid in understanding the behaviour of the gangue.

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Copper Enrichment in Solid with Selective Reverse

2020-8-17  In this article, as the first part of this copper extraction method recently proposed by Turan , chalcopyrite concentrate was leached in the presence of oxalic acid and hydrogen peroxide to dissolve the iron preferentially as iron oxalate and leave the copper as copper oxalate in the leaching residue which would afterward be exposed to HCl ...

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Extraction of Tin and Copper by Acid Leaching of PCBs

2013-2-2  Nitric acid, a strong oxidizing agent has selective dssouton propertes for copper tn and lead. Moreover t is cheap and the possibility of its regeneration makes it preferable to HCl which may form unwanted precipitates. It forms a precipitate of metastannic acid on reaction with tin. With copper and lead, it forms soluble nitrates[10].

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A comprehensive study of the leaching behavior and ...

2021-7-28  the increase in the leaching time and temperature enhanced the leaching rate of copper. The leaching rate increased up to a certain value with increasing the agitation rate, acid concentration, and liquid/solid ratio and, then, reduced with a further increment. Agitaion rate had the highest in uence on the dissolution of copper. The 3D response ...

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Process development for recovery of copper and

More than 99% of copper content was dissolved by using two consecutive sulfuric acid leaching steps in the presence of H2O2 as oxidizing agents. The solid residue of 2nd leaching step was treated by acidic thiourea in the presence of ferric iron as oxidizing agent and

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Copper leaching from brake wear debris in standard ...

Quantification of the copper content of and copper leaching from a disc brake wear debris sample was performed using microwave-assisted acid digestion, the Federal Toxicity Characteristic Leaching Procedure (TCLP), and the State of California Waste Extraction Test (WET). The brake wear debris tested was a composite sample obtained from a brake dynamometer test of one brake pad source

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LEACHING OF A Cu-CoORE FROM CONGO USING

2013-7-23  oxidised copper (2-4% Cu) and cobalt (1-3% Co) [1,2]. The lack of response of Cu-Co oxide minerals during flotation [3] implies that heap or vat leaching should be considered for these ores. In industrial heap or vat operations, sulphuric acid is commonly used to leach copper from oxide minerals such as malachite (CuCO 3.Cu(OH) 2), azurite ...

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Acidity as a factor in leaching of copper, chromium and ...

ing was found to be higher in citric acid than in dilute sulfuric acid solutions. Leaching of copper, chromium and arsenic was not proportional to the amount of metal present before leaching. Keywords-CCA Leaching pH Treatedwood ... and a borax/HCl buffer (pH 8.5). All solutions were prepared with glass-distilled deionized water.

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Copper leaching from brake wear debris in standard ...

Quantification of the copper content of and copper leaching from a disc brake wear debris sample was performed using microwave-assisted acid digestion, the Federal Toxicity Characteristic Leaching Procedure (TCLP), and the State of California Waste Extraction Test (WET). The brake wear debris tested was a composite sample obtained from a brake dynamometer test of one brake pad source

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Metals Special Issue : Separation and Leaching for ...

2020-12-31  Herein we investigated simple acid leaching to effectively extract copper and limit iron dissolution. Selective copper leaching was achieved with all the acids studied, including HCl, HNO 3, and H 2 SO 4. The lower concentration of acid solutions resulted in a larger difference in leachabilities between Cu and Fe.

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Hydrometallurgical Recovery of Metals from Large

2015-9-29  Among the leaching reagents examined, hydrochloric acid (HCl) showed great potential for the recovery of metals. The HCl-mediated leaching of waste PCBs was investigated over a

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LEACHING OF A Cu-CoORE FROM CONGO USING

2013-7-23  oxidised copper (2-4% Cu) and cobalt (1-3% Co) [1,2]. The lack of response of Cu-Co oxide minerals during flotation [3] implies that heap or vat leaching should be considered for these ores. In industrial heap or vat operations, sulphuric acid is commonly used to leach copper from oxide minerals such as malachite (CuCO 3.Cu(OH) 2), azurite ...

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Efficiencies of Acid Digestion/Leaching Techniques in the ...

2015-6-6  Distribution of iron in various soil samples using leaching (HCl) Leaching of soil samples and determination of iron concentrations Dried soil sample (2g) was weighed and transferred into a round bottom flask; 10cm 3 analar concentrated HCl acid was added. The flask was placed on a sand-bath

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The Alteration Mechanism of Copper-bearing Biotite

2019-10-21  The order of factors effecting the copper leaching rate of the ores in acid leaching experiments was temperature > sample size > H2SO4 concentration > leaching time > stirring speed.

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Predictive Models of Leaching Processes: A Critical Review

2016-1-20  dissolution, manganese, uranium and copper leaching. Abstract — This paper critically reviews models employed in . various leaching processes. The aim of this work is to . study various leaching models for the development of a model that can predict both recovery and reagent consumption using available mineralogical data.

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A Method for Leaching or Dissolving Gold From Ores

2005-8-18  Note that the vapor pressure of the acid corresponds to the sum of the vapor pressure of HCl and water above the solution taken from tabulated data found in the literature.15 For instance ...

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Reacting copper(II) oxide with sulfuric acid

By reacting copper (II) oxide, a black solid, with colourless dilute sulfuric acid, they produce copper (II) sulfate with a characteristic blue colour. Students can then obtain blue copper (II) sulfate pentahydrate crystals. Using the procedure below, it should take no

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