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 principales: Comelli, Nora Alejandra, Ávila, María Cecilia, Volzone, Cristina, Ponzi, Marta Isabel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Química
Monochloroacetic
Hydration
Alpha pinene
Cineols
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/104130
http://hdl.handle.net/11336/2188
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-104130
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Monochloroacetic
Hydration
Alpha pinene
Cineols
spellingShingle Química
Monochloroacetic
Hydration
Alpha pinene
Cineols
Comelli, Nora Alejandra
Ávila, María Cecilia
Volzone, Cristina
Ponzi, Marta Isabel
Hydration of α-pinene catalyzed by acid clays
topic_facet 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.
format Articulo
Articulo
author Comelli, Nora Alejandra
Ávila, María Cecilia
Volzone, Cristina
Ponzi, Marta Isabel
author_facet Comelli, Nora Alejandra
Ávila, María Cecilia
Volzone, Cristina
Ponzi, Marta Isabel
author_sort Comelli, Nora Alejandra
title Hydration of α-pinene catalyzed by acid clays
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
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/104130
http://hdl.handle.net/11336/2188
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AT avilamariacecilia hydrationofapinenecatalyzedbyacidclays
AT volzonecristina hydrationofapinenecatalyzedbyacidclays
AT ponzimartaisabel hydrationofapinenecatalyzedbyacidclays
bdutipo_str Repositorios
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