Document
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Hydrometallurgy
type: Generically Dependent Continuant
type: Information Content Entity
type: Entity
type: Continuant
type: Document
type: Journal
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type: Periodical
publication venue for: Improvement effect of organic ligands on chalcopyrite leaching in the aqueous medium of sulfuric acid‑hydrogen peroxide-ethylene glycol
type: Thing

Improvement effect of organic ligands on chalcopyrite leaching in the aqueous medium of sulfuric acid‑hydrogen peroxide-ethylene glycol
type: Document
most specific type: Article
type: Information Content Entity
type: Thing
has funding vehicle: Consejo Nacional de Ciencia y Tecnologí­a, CONACYT: 284302
origen: scopus
related by: authorship_43885
has publication venue: Hydrometallurgy
related by: authorship_43886
related by: authorship_43887
most specific type: Document
date time value: article date 6697
type: Article
crisid: 6697
doi: 10.1016/j.hydromet.2020.105293
estado: published
freetext keyword: Chalcopyrite; Copper concentrate; Covellite; Ethylenediaminetetraacetic acid; Oxalic acid; Two-stage leaching process Copper compounds; Copper smelting; Dissolution; Ethylene; Ethylene glycol; Hydrogen peroxide; Iron compounds; Leaching; Ligands; Oxalic acid; Oxidation; Peroxides; Polyols; Solvent extraction; Sulfide minerals; Sulfuric acid; Chalcopyrite; Chalcopyrite leaching; Copper concentrates; Covellite; Leaching process; Low concentrations; Pregnant leach solutions; Temperature and pressures; Ethylenediaminetetraacetic acid
type: Continuant
has funding vehicle: UASLP-4528
type: Generically Dependent Continuant
volume: 193
artnum: 105293
e iscopus: 2-s2.0-85080975009
type: Entity
abstract: The addition of ethylenediaminetetraacetic acid (EDTA) to a 1 M H2O2 leaching solution with low concentrations of sulfuric acid (0.007 M) and ethylene glycol (EG) (0.1 M) promotes significant increases of copper and iron leached from chalcopyrite. However, copper purification by solvent extraction is not possible due to the elevated stability of copper-EDTA and iron-EDTA complexes in the resulting leach liquor. Therefore, a two-stage process is presented that enables copper and iron dissolution at ambient temperature and pressure (26 °C and 101.325 kPa, respectively), without the necessity of solvent extraction. The proposed process uses the H2SO4-H2O2-ethylene glycol leaching solution in combination with organic ligands (oxalic acid (OxA) or EDTA). The first stage, using the leaching solution with oxalic acid, dissolved 29.5%25 of iron and transformed 49%25 of the copper to an oxalate salt; while in the second stage, the H2SO4-H2O2-ethylene glycol-EDTA leaching solution favored both the rapid dissolution of the copper oxalate salt and the chalcopyrite that did not react in the first stage. In this manner, the pregnant leach solution (PLS) from the second stage contained 90%25 and 35%25 of the total copper and iron, respectively, which may be electrowon directly. These results showed that the use of organic ligands promotes the formation of copper and iron complexes which help to delay, but not to avoid the decomposition of hydrogen peroxide due to a Fenton reaction and therefore, this results in an increase of the percentages of copper and iron leached, which permits processing at higher pulp density (50 g/L). © 2020 Elsevier B.V.

UASLP-4528
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type: BFO_0000020
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funding vehicle for: Improvement effect of organic ligands on chalcopyrite leaching in the aqueous medium of sulfuric acid‑hydrogen peroxide-ethylene glycol

Continuant
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Entity
type: Class

Consejo Nacional de Ciencia y Tecnologí­a, CONACYT: 284302
type: Relationship
type: BFO_0000020
type: Entity
type: Thing
type: Grant
type: Continuant
funding vehicle for: Improvement effect of organic ligands on chalcopyrite leaching in the aqueous medium of sulfuric acid‑hydrogen peroxide-ethylene glycol

Generically Dependent Continuant
type: Class

individual
rights: termsOfUse
date: 2026-08-25T07:00:35
publisher: vivo
type: Document
label: RDF description of Improvement effect of organic ligands on chalcopyrite leaching in the aqueous medium of sulfuric acid‑hydrogen peroxide-ethylene glycol - http://orbis.uaslp.mx/vivo/individual/scopus6696

Article
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Information Content Entity
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