The catalytic activity of binary oxides of Al2O3–Eu2O3, Al2O3–Sm2O3, Al2O3–Nd2O3, Al2O3–Pr6O11, and Al2O3–Y2O3 were checked in the transformations of α and β-pinene oxides. Al2O3–Eu2O3 and Al2O3–Nd2O3 are found to be best catalysts for α-pinene oxide isomeriztion. Among the oxiranes, α-pinene oxide showed more activity mainly yielding 2,2,3-trimethyl cyclopentene-1-acetaldehyde. β-pinene oxide produced trans-myrtanal and myrtanol.
Binary oxides of alumina with rare earths like europium, samarium, praseodymium, neodymium, and yttrium were prepared by coprecipitation from corresponding nitrates. The composition, thermal stability, and surface properties of the catalysts were determined using XRD, TGA, XPS, and MAS 27Al NMR. Surface area and pore size of the catalysts were determined by BET and mercury porosimetry. The catalysts were found to be amorphous and aluminium atom showed tetrahedral and octahedral coordination in its lattice. Catalysts showed weak to moderate acidity and basicity.
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