Hydration of α-pinene and camphene over USY zeolites

H. Valente, J. Vital

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The acid catalysed hydration reactions of α-pinene and camphene, respectively, using USY catalysts in aqueous acetone at 55 °C, are studied. The catalyst samples were prepared from zeolite Y by hydrothermal treatments at temperatures ranging from 450 to 850 °C. The so generated extra-framework aluminium species were kept in the samples. The main products of both hydration reactions are α-terpineol, in the case of α-pinene hydration and isoborneol, when camphene is used as the starting reagent. Although zeolite H-Y is not active as catalyst for these hydration reactions, USY catalysts show a reasonable activity and are very selective to the above mentioned terpenic alcohols. Selectivity increases with the relative concentration of Lewis sites.

Original languageEnglish
Pages (from-to)555-562
Number of pages8
JournalStudies in Surface Science and Catalysis
Volume108
Publication statusPublished - 1 Jan 1997

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Camphene
Zeolites
zeolites
Hydration
hydration
catalysts
Catalysts
Acetone
Aluminum
acetone
reagents
alcohols
Alcohols
selectivity
aluminum
acids
Acids
camphene
products

Cite this

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abstract = "The acid catalysed hydration reactions of α-pinene and camphene, respectively, using USY catalysts in aqueous acetone at 55 °C, are studied. The catalyst samples were prepared from zeolite Y by hydrothermal treatments at temperatures ranging from 450 to 850 °C. The so generated extra-framework aluminium species were kept in the samples. The main products of both hydration reactions are α-terpineol, in the case of α-pinene hydration and isoborneol, when camphene is used as the starting reagent. Although zeolite H-Y is not active as catalyst for these hydration reactions, USY catalysts show a reasonable activity and are very selective to the above mentioned terpenic alcohols. Selectivity increases with the relative concentration of Lewis sites.",
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Hydration of α-pinene and camphene over USY zeolites. / Valente, H.; Vital, J.

In: Studies in Surface Science and Catalysis, Vol. 108, 01.01.1997, p. 555-562.

Research output: Contribution to journalArticle

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T1 - Hydration of α-pinene and camphene over USY zeolites

AU - Valente, H.

AU - Vital, J.

N1 - Funding for this work from JNICT (Junta Nacional de Investigagao Cientifica PBIC/C/CEN/1061/92, is gratefully acknowledged.

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Y1 - 1997/1/1

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