hydrogen peroxide copper leaching

Enhanced leaching of copper from chalcopyrite in

2007-6-1 · The dissolution of copper from chalcopyrite was investigated in the presence of hydrogen peroxide and ethylene glycol. Hydrogen peroxide was used as oxidant in the leaching process. Addition of a small amount of ethylene glycol significantly improved the copper dissolution. The copper leaching mechanism was established by examining the ...

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Leaching of Copper from Metal Powders Mechanically ...

2016-1-1 · The dissolution of copper from waste printed circuit boards in chloride media using hydrogen peroxide as oxidant was carried out. The effects of stirring speed, temperature, solid/liquid ratio and concentrations of HCl and H 2 O 2 on the leaching of copper were investigated. The copper extraction increased significantly with the increase of HCl concentration.

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Leaching of chalcopyrite with hydrogen peroxide in ...

2018-7-1 · Key words: chalcopyrite; leaching; hydrogen peroxide; hydrochloric acid; sulphur 1 Introduction Demand for copper has increased dramatically in the world over the last few decades. For commercial exploitation, copper deposits generally need to be in excess of 0.5%, and preferably over 2% [1].

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Chalcopyrite Leaching with Hydrogen Peroxide in Formic ...

2020-2-20 · Abstract This study is concerned with the leaching process of copper with hydrogen peroxide (H2O2) and formic acid (HCOOH) from the Küre chalcopyrite concentrate. All experiments were carried out in a leaching system equipped with an adjustable temperature shaker under atmospheric pressure. The needed oxygen was provided by H2O2

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Study of chalcopyrite leaching from a copper concentrate ...

2017-5-1 · Ethylene glycol plays an important role in increasing the acidic hydrogen peroxide leaching of chalcopyrite, by inhibiting H 2 O 2 decomposition catalyzed by the copper and iron ions present in solution. It was suggested that hydroxyradicals, product of the Fenton-type reactions, are the driving force for peroxide decomposition and, these were ...

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Dissolution kinetics and solubilities of copper sulfides ...

2021-11-1 · The effect of hydrogen peroxide leaching on copper iron sulfides. The hydrogen peroxide leaching in the seven-step sequential extraction applied by Dold (2003a) showed a limited selectivity to dissolve secondary sulfide minerals. When mixed with sulfides, a 35% hydrogen peroxide solution produces an exothermic, usually violent, reaction.

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Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in ...

2019-10-30 · Hydrogen peroxide is unstable and quickly decomposes in the leaching process of sulfide minerals in the presence of iron and copper ions, mineral particles, and different impurities. Intensive depletion of hydrogen peroxide by metal cations and discontinuation of chalcopyrite leaching after 60 min were confirmed by Olubambi and Potgieter [ 40 ...

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Leaching of a pyrite-based ore containing copper using ...

2020-6-24 · Here, the leaching of a sulfide ore (32% Fe, 2% Cu) is investigated using a mixture of sulfuric acid and hydrogen peroxide (0.15 M H 2 SO 4 and 0.5 M H 2 O 2), in proportions forming a slurry 10% w/w. The leaching process is found to occur in two stages, the first corresponding to an exothermic, peroxide-mediated dissolution, and the second ...

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(PDF) Leaching of chalcopyrite with hydrogen peroxide in ...

Leaching of chalcopyrite (CuFeS) 2 concentrate with mixed lixiviant containing H 2 O 2 and HCl results showed that even the application of a strong oxidant, such as

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Improvement of Stability of Hydrogen Peroxide using ...

2020-7-13 · Hydrogen peroxide, Ethylene glycol, Citric acid, Stability, Copper, Ergun’s test Abstract: Owing to its high oxidising power and environmentally friendly nature, hydrogen peroxide (H 2 O 2) is commonly used in environmental and hydrometallurgical applications such as treatment of cyanidation effluents and leaching of metals from

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(PDF) Chalcopyrite Leaching with Hydrogen Peroxide in ...

2022-2-4 · Leaching systems utilized two oxidants (ferric ion and hydrogen peroxide) to investigate the kinetics of copper extractions. All leaching tests were performed by bottle roll leaching tests with 6 ...

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LEACHING OF CHALCOPYRITE CONCENTRATE IN

The maximum copper extraction was obtained with the following conditions without stirring: 240 min of leaching time, 3.0 M hydrogen peroxide concentration, 40°C leaching temperature and 53-75 m ...

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Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in ...

2019-10-30 · Hydrogen peroxide is unstable and quickly decomposes in the leaching process of sulfide minerals in the presence of iron and copper ions, mineral particles, and different impurities. Intensive depletion of hydrogen peroxide by metal cations and discontinuation of chalcopyrite leaching after 60 min were confirmed by Olubambi and Potgieter [ 40 ...

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The Effect of Hydrogen Peroxide on Leach Dump Bacteria

2018-12-27 · In some leaching operations T. ferrooxidans are unable to rapidly regenerate ferric iron so oxidizing agents may be necessary. It has been suggested that hydrogen peroxide (H2O2) could be added to influent leach liquors. The

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Improved Process for Leaching Refractory Copper Sulfides ...

2018-8-19 · Abstract. Ethylene glycol additions to aqueous acid solutions for leaching copper sulfides increase both copper and iron extractions compared to a conventional sulfuric acid leach with hydrogen peroxide (H 2 O 2).The role of ethylene glycol is to prevent peroxide destruction, which normally occurs in solutions that contain both cupric and ferric ions.

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SEPARATION OF COPPER FROM A LEACHING SOLUTION

of copper can be leached from PCBs after two leaching stages with sulfuric acid and hydrogen peroxide. Silvas et al. (2015) investigated copper leaching with sulfuric acid + hydrogen peroxide and 1:10 solid/liquid ratio at 75ºC over 4h. After two successive leaching stages, 100% of the copper in comminuted PCBs was leached.

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The Decomposition of Hydrogen Peroxide in Acidic

2021-3-26 · The Decomposition of Hydrogen Peroxide in acidic Copper Sulfate Solutions ix Figure 5.4: Temperature–time profile of the 1.0 M solution of sulfuric acid and 0.3144M of copper sulfate with 5ml of hydrogen peroxide injected at different initial temperatures (47 C,

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Effective Recovery Process of Copper from Waste Printed ...

2020-12-21 · This study presents an optimized leaching and electrowinning process for the recovery of copper from waste printed circuit boards including studies of chemical consumption and recirculation of leachate. Optimization of leaching was performed using response surface methodology in diluted sulfuric acid and hydrogen peroxide media. Optimum leaching

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Improvement of Stability of Hydrogen Peroxide using ...

2020-7-13 · Hydrogen peroxide, Ethylene glycol, Citric acid, Stability, Copper, Ergun’s test Abstract: Owing to its high oxidising power and environmentally friendly nature, hydrogen peroxide (H 2 O 2) is commonly used in environmental and hydrometallurgical applications such as treatment of cyanidation effluents and leaching of metals from

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Cu-silicalite-1 catalyst for the wet hydrogen peroxide ...

2008-3-13 · The aim of the present work is to study the heterogeneous wet hydrogen peroxide catalytic oxidation (WHPCO) of phenol using copper bearing Silicalite-1 type zeolite, prepared by direct hydrothermal synthesis. The catalysts used for this study were three: one (Na)Cu-Silicalite-1 and two (H)Cu-Silicalite-1 prepared by different ion exchange methods. The results on

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Chalcopyrite Leaching with Hydrogen Peroxide and Iodine ...

2021-9-30 · In Chile, the hydrometallurgical plants are operating below their capacity due to a depletion of copper oxide ores. To obtain suitable pregnant leach solutions (PLSs) for hydrometallurgical plants, leaching solutions combining iodine-based oxidants and hydrogen peroxide in a chloride–acid medium, at room temperature and pressure were studied. Factorial

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Leaching of Copper from Metal Powders Mechanically ...

2017-1-20 · capacity of hydrogen peroxide is so strong that it is considered a highly reactive oxygen species. The oxidation and dissolution of copper was investigated using hydrogen peroxide as oxidizer and glycine as a complexing agent23-24. The dissolution behavior of copper in citric acid solutions with the presence of hydrogen peroxide were studied25-26.

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The Effect of Hydrogen Peroxide on Leach

2018-12-27 · In some leaching operations T. ferrooxidans are unable to rapidly regenerate ferric iron so oxidizing agents may be necessary. It has been suggested that hydrogen peroxide (H2O2) could be added to influent leach

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SEPARATION OF COPPER FROM A LEACHING SOLUTION

of copper can be leached from PCBs after two leaching stages with sulfuric acid and hydrogen peroxide. Silvas et al. (2015) investigated copper leaching with sulfuric acid + hydrogen peroxide and 1:10 solid/liquid ratio at 75ºC over 4h. After two successive leaching stages, 100% of the copper in comminuted PCBs was leached.

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The Decomposition of Hydrogen Peroxide in Acidic

2021-3-26 · The Decomposition of Hydrogen Peroxide in acidic Copper Sulfate Solutions ix Figure 5.4: Temperature–time profile of the 1.0 M solution of sulfuric acid and 0.3144M of copper sulfate with 5ml of hydrogen peroxide injected at different initial temperatures (47 C,

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RECOVERY OF COPPER FROM COPPER SLAG AND

2014-9-8 · Leaching with hydrogen peroxide Effect of hydrogen peroxide concentration As copper extractions in the leaching experiments performed with sulphuric acid and ferric sulphate were low, a series of leaching experiments was conducted with hydrogen peroxide which is a strong oxidant. To this end, the slag and the slag

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Improvement of Stability of Hydrogen Peroxide using ...

2020-7-13 · Hydrogen peroxide, Ethylene glycol, Citric acid, Stability, Copper, Ergun’s test Abstract: Owing to its high oxidising power and environmentally friendly nature, hydrogen peroxide (H 2 O 2) is commonly used in environmental and hydrometallurgical applications such as treatment of cyanidation effluents and leaching of metals from

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LEACHING OF METALS FROM WASTE PRINTED CIRCUIT

2015-1-10 · Copper leaching was increased for sulfuric acid concentrations up to 1.2 mol/L and hydrogen peroxide concentrations of 10.0 vol% for a pulp density of 100 g/L at 50°C over 4 h, whereas for the same concentrations of sulfuric acid and hydrogen peroxide

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v118n12a4 Decomposition of hydrogen peroxide in

2019-1-29 · gold leaching. The effects of free and complexed iron and copper catalysts on the oxidation and consumption of hydrogen peroxide and cyanide were also investigated. It was shown that the cyano complexes of Fe(II) and Cu(I) are also effective as decomposition catalysts. Hydrogen peroxide concentrations above 0.01 M decreased the free cyanide ...

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Cu-silicalite-1 catalyst for the wet hydrogen peroxide ...

2008-3-13 · The aim of the present work is to study the heterogeneous wet hydrogen peroxide catalytic oxidation (WHPCO) of phenol using copper bearing Silicalite-1 type zeolite, prepared by direct hydrothermal synthesis. The catalysts used for this study were three: one (Na)Cu-Silicalite-1 and two (H)Cu-Silicalite-1 prepared by different ion exchange methods. The results on

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