Ti-MCM-41 as catalyst for a-pinene oxidation Study of the effect of Ti content and H2O2 addition on activity and selectivity

SANDRA G. CASUSCELLI; GRISELDA A. EIMER; ANALIA CANEPA; ANGELICA C. HEREDIA; CARLOS E. PONCIO; MÓNICA E. CRIVELLO ; ALFREDO AGUILAR; CELSO F. PEREZ ; EDUARDO R. HERRERO

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ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2008 p. 678 - 683

0920-5861

Ti containing mesoporous materials with a MCM-41 structure were applied as heterogeneous catalysts for the liquid phase oxidation of apinene with hydrogen peroxide at 343 K. The catalysts were characterized by N2 adsorption, XRD and DRUV-Vis. The results obtained by varying the Ti content showed slight changes in the a-pinene conversion. The major products were verbenol, verbenone and campholenic aldehyde with a conversion about 12-16%. The yield of the reaction products was duplicated when an additional amount of H2O2 was added after 1 h of reaction. A high selectivity was obtained for the products of the allylic oxidation. A reaction mechanism was proposed in order to explain the obtained results.