Hydration of α-pinene catalyzed by acid clays

The hydration reaction of α-pinene in the presence of natural clays treated with monochloroacetic acid as catalyst to obtain oxygenated compounds was studied. Catalysts were characterized using X-ray diffraction, differential thermal analysis, programmed thermal desorption of adsorbed pyridine, and...

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Autores: Comelli, Nora Alejandra, Ávila, María Cecilia, Volzone, Cristina, Ponzi, Marta Isabel
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:Argentina
Institución:Universidad Nacional de La Plata
Repositorio:SEDICI (UNLP)
Idioma:inglés
OAI Identifier:oai:sedici.unlp.edu.ar:10915/104130
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/104130
Access Level:acceso abierto
Palabra clave:Química
Monochloroacetic
Hydration
Alpha pinene
Cineols
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spelling Hydration of α-pinene catalyzed by acid claysComelli, Nora AlejandraÁvila, María CeciliaVolzone, CristinaPonzi, Marta IsabelQuímicaMonochloroaceticHydrationAlpha pineneCineolsThe hydration reaction of α-pinene in the presence of natural clays treated with monochloroacetic acid as catalyst to obtain oxygenated compounds was studied. Catalysts were characterized using X-ray diffraction, differential thermal analysis, programmed thermal desorption of adsorbed pyridine, and infrared spectroscopic analysis of adsorbed pyridine to determine Brønsted and Lewis acid sites. Catalytic tests revealed that treatment of the natural clay with the acid improved the catalytic activity and the selectivity toward oxygenated products by increasing the acidity of the catalyst. The selectivity toward oxygenated compounds increased with the augment of the α-pinene conversion because of greater contact between water molecules with the remaining α-pinene molecules. The natural clay without treatment produced compounds resulting from α-pinene isomerization, whereas the treated clays produced alcohols and other products in addition to isomerization compounds. After a certain time, the α-terpineol was isomerized into cineols. Studies of the reusability of the JAL catalyst were performed (clay treated with monochloroacetic acid). As the number of reuses increased, the percent conversion decreased; however, the selectivity toward oxygenated compounds increased.Centro de Tecnología de Recursos Minerales y Cerámica2013-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf689-697http://sedici.unlp.edu.ar/handle/10915/104130enginfo:eu-repo/semantics/altIdentifier/url/http://hdl.handle.net/11336/2188info:eu-repo/semantics/altIdentifier/issn/2391-5420info:eu-repo/semantics/altIdentifier/doi/10.2478/s11532-013-0217-4info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2024-05-08T13:00:31Zoai:sedici.unlp.edu.ar:10915/104130Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 13:00:32.217SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Hydration of α-pinene catalyzed by acid clays
title Hydration of α-pinene catalyzed by acid clays
spellingShingle Hydration of α-pinene catalyzed by acid clays
Comelli, Nora Alejandra
Química
Monochloroacetic
Hydration
Alpha pinene
Cineols
title_short Hydration of α-pinene catalyzed by acid clays
title_full Hydration of α-pinene catalyzed by acid clays
title_fullStr Hydration of α-pinene catalyzed by acid clays
title_full_unstemmed Hydration of α-pinene catalyzed by acid clays
title_sort Hydration of α-pinene catalyzed by acid clays
dc.creator.none.fl_str_mv Comelli, Nora Alejandra
Ávila, María Cecilia
Volzone, Cristina
Ponzi, Marta Isabel
author Comelli, Nora Alejandra
author_facet Comelli, Nora Alejandra
Ávila, María Cecilia
Volzone, Cristina
Ponzi, Marta Isabel
author_role author
author2 Ávila, María Cecilia
Volzone, Cristina
Ponzi, Marta Isabel
author2_role author
author
author
dc.subject.none.fl_str_mv Química
Monochloroacetic
Hydration
Alpha pinene
Cineols
topic Química
Monochloroacetic
Hydration
Alpha pinene
Cineols
description The hydration reaction of α-pinene in the presence of natural clays treated with monochloroacetic acid as catalyst to obtain oxygenated compounds was studied. Catalysts were characterized using X-ray diffraction, differential thermal analysis, programmed thermal desorption of adsorbed pyridine, and infrared spectroscopic analysis of adsorbed pyridine to determine Brønsted and Lewis acid sites. Catalytic tests revealed that treatment of the natural clay with the acid improved the catalytic activity and the selectivity toward oxygenated products by increasing the acidity of the catalyst. The selectivity toward oxygenated compounds increased with the augment of the α-pinene conversion because of greater contact between water molecules with the remaining α-pinene molecules. The natural clay without treatment produced compounds resulting from α-pinene isomerization, whereas the treated clays produced alcohols and other products in addition to isomerization compounds. After a certain time, the α-terpineol was isomerized into cineols. Studies of the reusability of the JAL catalyst were performed (clay treated with monochloroacetic acid). As the number of reuses increased, the percent conversion decreased; however, the selectivity toward oxygenated compounds increased.
publishDate 2013
dc.date.none.fl_str_mv 2013-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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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://sedici.unlp.edu.ar/handle/10915/104130
url http://sedici.unlp.edu.ar/handle/10915/104130
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://hdl.handle.net/11336/2188
info:eu-repo/semantics/altIdentifier/issn/2391-5420
info:eu-repo/semantics/altIdentifier/doi/10.2478/s11532-013-0217-4
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
689-697
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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