Clean Limonene Epoxidation Using Ti-MCM-41 Catalyst

CAGNOLI V; CASUSCELLI S; ALVAREZ A; BENGOA J; GALLEGOS N; SAMANIEGO N; CRIVELLO M; GHIONE G; PEREZ C; HERRERO E; MARCHETTI G

APPLIED CATALYSIS A-GENERAL

Elsevier Science B.V., Netherlands. Editors: Prof. H.H. Kung, Evanston, USA. Prof. K. Segawa, Tokyo, Japan. Prof. J.C. Vedrine, Liverpool, UK.

Año: 2005 vol. 287 p. 227 - 235

0926-860X

The limonene oxidation with H2O2 (??clean?? oxidation) using a Ti-MCM-41 catalyst was studied. This catalyst was synthesized by a sol? gel method and characterized by XRD, DRS, ICP and BET. The operative reaction conditions, under which no Ti leaching was detected, were determined. In these conditions the catalyst has shown a high activity, and very good selectivity towards epoxides. The kinetic parameter measurements were carried assuming a heterogeneous reaction and empirical power rate law. Using the initial rate method, a first order with respect to the concentrations of catalyst, limonene and hydrogen peroxide were determined. An apparent activation energy value of 16.4 kJ/ mol and a pre-exponential Arrhenius´s factor of 7.1 l2 /g mol h were obtained.