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.
|Number of pages||8|
|Journal||Studies in Surface Science and Catalysis|
|Publication status||Published - 1 Jan 1997|