Alkaline metal fluoride synthesis as a subproduct of beta-spodumene leaching

This paper investigated the development of new techniques to recover fluorine as three valuable fluorides: cryolithionite (Li3Na3Al2F12), sodium hexafluorosilicate (Na2SiF6) and cryolite (Na3AlF6). The synthesis of these compounds was carried out through three routes: I) by precipitation in situ dur...

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Detalles Bibliográficos
Autores: Rosales, Gustavo Daniel, Ruiz Salado, Maria del Carmen, Rodriguez, Mario Humberto
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/5817
Acceso en línea:http://hdl.handle.net/11336/5817
Access Level:acceso abierto
Palabra clave:Lithium
Beta-Spodumene
Cryolithionite
Cryolite
Na2sif6
https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
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oai_identifier_str oai:ri.conicet.gov.ar:11336/5817
network_acronym_str AR
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repository_id_str
spelling Alkaline metal fluoride synthesis as a subproduct of beta-spodumene leachingRosales, Gustavo DanielRuiz Salado, Maria del CarmenRodriguez, Mario HumbertoLithiumBeta-SpodumeneCryolithioniteCryoliteNa2sif6https://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2This paper investigated the development of new techniques to recover fluorine as three valuable fluorides: cryolithionite (Li3Na3Al2F12), sodium hexafluorosilicate (Na2SiF6) and cryolite (Na3AlF6). The synthesis of these compounds was carried out through three routes: I) by precipitation in situ during the leaching process of beta spodumene at different temperatures and different HF concentrations, to produce Li3Na3Al2F12; II) by precipitation adding NaOH to the leach liquor of beta spodumene, to produce Na2SiF6 and Na3AlF6; and III) by coprecipitation<br />from pure reagents, to separately produce Li3Na3Al2F12, Na2SiF6 and Na3AlF6. Reagents and products were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), atomic absorption spectroscopy (AAS), scanning electronic microscopy (SEM) and electron probe microanalysis (EPMA). The experimental results indicate that the production of the fluorinated compounds was possible. Following route I), an enhancement of the crystal size was observed after increasing the concentrations of HF. It was also observed that a decrease in temperature favors precipitation of the solid. Furthermore, the presence of Na+ from albite (gangue) was essential for the formation of Li3Na3Al2F12. The compounds Na2SiF6 and Na3AlF6 were synthesized together using route II), with a recovery of 92%. Through route III) the three compounds were synthesized separately and these compounds were used as standards for XRD analysis.Fil: Rosales, Gustavo Daniel. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Investigaciones en Tecnología Química; ArgentinaFil: Ruiz Salado, Maria del Carmen. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Investigaciones En Tecnología Química; ArgentinaFil: Rodriguez, Mario Humberto. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; ArgentinaElsevier2013-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/5817Rosales, Gustavo Daniel; Ruiz Salado, Maria del Carmen; Rodriguez, Mario Humberto; Alkaline metal fluoride synthesis as a subproduct of beta-spodumene leaching; Elsevier; Hydrometallurgy (amsterdam); 139; 8-2013; 73-780304-386Xenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0304386X13001606info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/altIdentifier/doi/10.1016/j.hydromet.2013.07.008info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:35:28Zoai:ri.conicet.gov.ar:11336/5817instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:35:28.326CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Alkaline metal fluoride synthesis as a subproduct of beta-spodumene leaching
title Alkaline metal fluoride synthesis as a subproduct of beta-spodumene leaching
spellingShingle Alkaline metal fluoride synthesis as a subproduct of beta-spodumene leaching
Rosales, Gustavo Daniel
Lithium
Beta-Spodumene
Cryolithionite
Cryolite
Na2sif6
https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
title_short Alkaline metal fluoride synthesis as a subproduct of beta-spodumene leaching
title_full Alkaline metal fluoride synthesis as a subproduct of beta-spodumene leaching
title_fullStr Alkaline metal fluoride synthesis as a subproduct of beta-spodumene leaching
title_full_unstemmed Alkaline metal fluoride synthesis as a subproduct of beta-spodumene leaching
title_sort Alkaline metal fluoride synthesis as a subproduct of beta-spodumene leaching
dc.creator.none.fl_str_mv Rosales, Gustavo Daniel
Ruiz Salado, Maria del Carmen
Rodriguez, Mario Humberto
author Rosales, Gustavo Daniel
author_facet Rosales, Gustavo Daniel
Ruiz Salado, Maria del Carmen
Rodriguez, Mario Humberto
author_role author
author2 Ruiz Salado, Maria del Carmen
Rodriguez, Mario Humberto
author2_role author
author
dc.subject.none.fl_str_mv Lithium
Beta-Spodumene
Cryolithionite
Cryolite
Na2sif6
https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
topic Lithium
Beta-Spodumene
Cryolithionite
Cryolite
Na2sif6
https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
description This paper investigated the development of new techniques to recover fluorine as three valuable fluorides: cryolithionite (Li3Na3Al2F12), sodium hexafluorosilicate (Na2SiF6) and cryolite (Na3AlF6). The synthesis of these compounds was carried out through three routes: I) by precipitation in situ during the leaching process of beta spodumene at different temperatures and different HF concentrations, to produce Li3Na3Al2F12; II) by precipitation adding NaOH to the leach liquor of beta spodumene, to produce Na2SiF6 and Na3AlF6; and III) by coprecipitation<br />from pure reagents, to separately produce Li3Na3Al2F12, Na2SiF6 and Na3AlF6. Reagents and products were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), atomic absorption spectroscopy (AAS), scanning electronic microscopy (SEM) and electron probe microanalysis (EPMA). The experimental results indicate that the production of the fluorinated compounds was possible. Following route I), an enhancement of the crystal size was observed after increasing the concentrations of HF. It was also observed that a decrease in temperature favors precipitation of the solid. Furthermore, the presence of Na+ from albite (gangue) was essential for the formation of Li3Na3Al2F12. The compounds Na2SiF6 and Na3AlF6 were synthesized together using route II), with a recovery of 92%. Through route III) the three compounds were synthesized separately and these compounds were used as standards for XRD analysis.
publishDate 2013
dc.date.none.fl_str_mv 2013-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/5817
Rosales, Gustavo Daniel; Ruiz Salado, Maria del Carmen; Rodriguez, Mario Humberto; Alkaline metal fluoride synthesis as a subproduct of beta-spodumene leaching; Elsevier; Hydrometallurgy (amsterdam); 139; 8-2013; 73-78
0304-386X
url http://hdl.handle.net/11336/5817
identifier_str_mv Rosales, Gustavo Daniel; Ruiz Salado, Maria del Carmen; Rodriguez, Mario Humberto; Alkaline metal fluoride synthesis as a subproduct of beta-spodumene leaching; Elsevier; Hydrometallurgy (amsterdam); 139; 8-2013; 73-78
0304-386X
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0304386X13001606
info:eu-repo/semantics/altIdentifier/doi/
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.hydromet.2013.07.008
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 15.812429

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