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dc.rights.licenseAtribución-SinDerivadas 4.0 Internacional
dc.contributor.advisorOcampo Carmona, Luz Marina
dc.contributor.advisorRojas Reyes, Néstor Ricardo
dc.contributor.authorEcheverry Vargas, Luver de Jesús
dc.date.accessioned2023-02-07T17:58:24Z
dc.date.available2023-02-07T17:58:24Z
dc.date.issued2022-11-21
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/83360
dc.description.abstractEn esta tesis se obtuvo un concentrado de monacita [fosfato de elementos de tierras raras (ETRs)] a partir de residuos de la minería aluvial de oro, el cual es uno de los minerales más críticos del mundo, por ser fuente de ETRs. Los ETRs son de gran importancia en el desarrollo de materiales tecnológicos. En esta tesis, el concentrado de monacita fue sometido a un proceso de desfosforación con hidróxido de sodio e hidróxido de potasio. Se investigo diferentes condiciones de lixiviación con HCl y H2SO4, que permitirán la máxima extracción de cerio, lantano y neodimio, se determinó que la mayor extracción de estos elementos se logra con H2SO4. Se estableció que la adición de 10 % (v/v) de H2O2 aumenta la disolución de tierras raras hasta en un 93 %. Los ETRs se pueden recuperar hasta valores de 100 % aproximadamente, mediante precipitación con ácido oxálico. Se investigó la extracción de Ce, La y Nd utilizando D2EHP y Cyanex 572 diluidos en n-heptano como extractantes. En todas las condiciones experimentales evaluadas el D2EHP presentó mejores tasas de extracción de los ETRs. Además, se sintetizaron dieciocho solventes eutécticos profundos (DES) de los cuales ocho presentaron capacidad de extracción de Ce, La y Nd y uno de los DES alcanzó extracciones superiores al 90 % de estos elementos. Para tener un mayor entendimiento de la estructura del DES de mayor extracción y su interacción con una solución acuosa acida de lantano, se realizaron una serie de simulaciones de dinámica molecular de los sistemas involucrados y se comprobaron sus propiedades estructurales calculando las funciones de distribución radial de las interacciones principales. (tomado de la fuente)
dc.description.abstractMonazite is a rare earth element phosphate (REE) and is one of the most critical minerals in the world as it serves as a major source of REE. In this thesis, a monazite concentrate was obtained from alluvial gold mining tailings. Subsequently, the monazite concentrate was subjected to a dephosphorization process. Different leaching conditions were investigated with HCl and H2SO4, which will allow the maximum extraction of cerium, lanthanum, and neodymium, it was found that the highest extraction of these elements is achieved with H2SO4. The addition of 10 % (v/v) H2O2 was found to increase rare earth dissolution by up to 93 %. ETRs can be recovered up to ~ 100 % by precipitation with oxalic acid. The extraction of Ce, La and Nd was investigated using D2EHP and Cyanex 572 diluted in nheptane as extractants, in all experimental conditions evaluated D2EHP presented better extraction rates of the ETRs. In addition, eighteen deep eutectic solvents (DES) were synthesized of which eight presented extraction capacity of Ce, La and Nd and one reaching extractions higher than 90 % of these elements. To have a better understanding of the structure of the most extractable DES and their interaction with an acidic aqueous lanthanum solution, a series of molecular dynamics simulations of the systems involved were performed and their structural properties were tested by calculating the radial distribution functions of the main interactions.
dc.format.extentxx, 210 páginas
dc.format.mimetypeapplication/pdf
dc.language.isospa
dc.publisherUniversidad Nacional de Colombia
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.ddc660 - Ingeniería química::669 - Metalurgia
dc.titleExtracción de elementos de tierras raras a partir de monacita mediante solventes eutécticos profundos y su comparación con solventes orgánicos convencionales
dc.typeTrabajo de grado - Doctorado
dc.type.driverinfo:eu-repo/semantics/doctoralThesis
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dc.publisher.programMedellín - Minas - Doctorado en Ingeniería - Ciencia y Tecnología de Materiales
dc.contributor.researchgroupCiencia y Tecnología de Materiales
dc.coverage.regionBagre (Antioquia)
dc.description.degreelevelDoctorado
dc.description.degreenameDoctor en Ingeniería – Ciencia y Tecnología de Materiales
dc.description.researchareaMetalurgia extractiva
dc.description.researchareaValorización de residuos
dc.description.researchareaQuímica verde
dc.identifier.instnameUniversidad Nacional de Colombia
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombia
dc.identifier.repourlhttps://repositorio.unal.edu.co/
dc.publisher.facultyFacultad de Minas
dc.publisher.placeMedellín, Colombia
dc.publisher.branchUniversidad Nacional de Colombia - Sede Medellín
dc.relation.indexedLaReferencia
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.subject.lembTierras raras
dc.subject.lembPreparación mecánica de minerales
dc.subject.lembLixiviación
dc.subject.lembDinámica molecular
dc.subject.proposalElementos de tierras raras
dc.subject.proposalMonacita
dc.subject.proposalHidrometalurgia
dc.subject.proposalExtracción con solventes
dc.subject.proposalSolventes eutécticos profundos
dc.subject.proposalSimulación dinámica molecular
dc.subject.proposalValorización de residuos
dc.subject.proposalValorización de residuos
dc.subject.proposalMonazite
dc.subject.proposalHydrometallurgy
dc.subject.proposalSolvent extraction
dc.subject.proposalDeep eutectic solvents
dc.subject.proposalMolecular dynamic simulation
dc.title.translatedExtraction of rare earth elements from monazite by deep eutectic solvents and comparison with conventional organic solvents
dc.type.coarhttp://purl.org/coar/resource_type/c_db06
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.contentText
dc.type.redcolhttp://purl.org/redcol/resource_type/TD
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2
oaire.awardtitleRecuperación de elementos de tierras raras a partir de minerales presentes en arenas negras, residuos de minería de oro aluvial en El Bagre-Antioquia
oaire.fundernameMinisterio de Ciencia de Colombia
dcterms.audience.professionaldevelopmentPúblico general
dc.description.curricularareaÁrea Curricular de Materiales y Nanotecnología
dc.contributor.orcid0000-0001-7365-4361


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