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Extracción de elementos de tierras raras a partir de monacita mediante solventes eutécticos profundos y su comparación con solventes orgánicos convencionales
dc.rights.license | Atribución-SinDerivadas 4.0 Internacional |
dc.contributor.advisor | Ocampo Carmona, Luz Marina |
dc.contributor.advisor | Rojas Reyes, Néstor Ricardo |
dc.contributor.author | Echeverry Vargas, Luver de Jesús |
dc.date.accessioned | 2023-02-07T17:58:24Z |
dc.date.available | 2023-02-07T17:58:24Z |
dc.date.issued | 2022-11-21 |
dc.identifier.uri | https://repositorio.unal.edu.co/handle/unal/83360 |
dc.description.abstract | En 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.abstract | Monazite 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.extent | xx, 210 páginas |
dc.format.mimetype | application/pdf |
dc.language.iso | spa |
dc.publisher | Universidad Nacional de Colombia |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
dc.subject.ddc | 660 - Ingeniería química::669 - Metalurgia |
dc.title | Extracción de elementos de tierras raras a partir de monacita mediante solventes eutécticos profundos y su comparación con solventes orgánicos convencionales |
dc.type | Trabajo de grado - Doctorado |
dc.type.driver | info:eu-repo/semantics/doctoralThesis |
dc.type.version | info:eu-repo/semantics/acceptedVersion |
dc.publisher.program | Medellín - Minas - Doctorado en Ingeniería - Ciencia y Tecnología de Materiales |
dc.contributor.researchgroup | Ciencia y Tecnología de Materiales |
dc.coverage.region | Bagre (Antioquia) |
dc.description.degreelevel | Doctorado |
dc.description.degreename | Doctor en Ingeniería – Ciencia y Tecnología de Materiales |
dc.description.researcharea | Metalurgia extractiva |
dc.description.researcharea | Valorización de residuos |
dc.description.researcharea | Química verde |
dc.identifier.instname | Universidad Nacional de Colombia |
dc.identifier.reponame | Repositorio Institucional Universidad Nacional de Colombia |
dc.identifier.repourl | https://repositorio.unal.edu.co/ |
dc.publisher.faculty | Facultad de Minas |
dc.publisher.place | Medellín, Colombia |
dc.publisher.branch | Universidad Nacional de Colombia - Sede Medellín |
dc.relation.indexed | LaReferencia |
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dc.rights.accessrights | info:eu-repo/semantics/openAccess |
dc.subject.lemb | Tierras raras |
dc.subject.lemb | Preparación mecánica de minerales |
dc.subject.lemb | Lixiviación |
dc.subject.lemb | Dinámica molecular |
dc.subject.proposal | Elementos de tierras raras |
dc.subject.proposal | Monacita |
dc.subject.proposal | Hidrometalurgia |
dc.subject.proposal | Extracción con solventes |
dc.subject.proposal | Solventes eutécticos profundos |
dc.subject.proposal | Simulación dinámica molecular |
dc.subject.proposal | Valorización de residuos |
dc.subject.proposal | Valorización de residuos |
dc.subject.proposal | Monazite |
dc.subject.proposal | Hydrometallurgy |
dc.subject.proposal | Solvent extraction |
dc.subject.proposal | Deep eutectic solvents |
dc.subject.proposal | Molecular dynamic simulation |
dc.title.translated | Extraction of rare earth elements from monazite by deep eutectic solvents and comparison with conventional organic solvents |
dc.type.coar | http://purl.org/coar/resource_type/c_db06 |
dc.type.coarversion | http://purl.org/coar/version/c_ab4af688f83e57aa |
dc.type.content | Text |
dc.type.redcol | http://purl.org/redcol/resource_type/TD |
oaire.accessrights | http://purl.org/coar/access_right/c_abf2 |
oaire.awardtitle | Recuperación de elementos de tierras raras a partir de minerales presentes en arenas negras, residuos de minería de oro aluvial en El Bagre-Antioquia |
oaire.fundername | Ministerio de Ciencia de Colombia |
dcterms.audience.professionaldevelopment | Público general |
dc.description.curriculararea | Área Curricular de Materiales y Nanotecnología |
dc.contributor.orcid | 0000-0001-7365-4361 |
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