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In order to encourage the camphene production, isomerization product of α-pinene, in this study are tested the clinoptiolite zeolites, natural (available in our country, Mexico, specifically in Michoacan), as well as comercial zeolites ZSM-5, as a catalyst for this reaction, in the range of 130 to 230°C. It was found that the natural material with a simple treatment (two washed with deionized water) shows good conversión in the isomerization of α-pinene and higher selectivity towards camphene, compared with commercial zeolites. [ABSTRACT FROM AUTHOR]

The catalytic activity of Sn-MCM-41 and Sn-SBA-15 for nopol synthesis from β-pinene and paraformaldehyde was compared in this work. The materials were prepared by the hydrothermal and the incipient wetness impregnation methods using stannous chloride as Sn precursor. In contrast to hydrothermal methods, impregnation leads to more active and selective materials for nopol production from β-pinene. β-Pinene conversion over Sn-MCM-41 and Sn-SBA-15 was similar. In the materials obtained by hydrothermal procedures, Sn(IV) species were detected as bulk SnO2 in MCM-41 and isomorphously substituting Si in SBA-15. [ABSTRACT FROM AUTHOR]