Resumo

ROJAS, HUGO; CASTANEDA, JULIO CESAR  e  REYES, PATRICIO. ISOPULEGOL OBTAIN OVER Ir/Nb₂O₅/SiO₂ CATALYST. KINETIC APPROACH. Dyna rev.fac.nac.minas [online]. 2010, vol.77, n.162, pp.5-12. ISSN 0012-7353.

Kinetics of Citronellal conversion to isopulegol over catalyst was performed in a range of temperature 303 - 343 K, a hydrogen pressure 0.62 - 0.20 MPa and a citronelal concentrations at 0.1M to 0.025 M. The results indicate that the catalyst of Iridium supported over SiO2-Nb2O5 induces selectivity towards isopulegol due to high acidity and the presence of surface metal sites. To avoid mass transfer limitations were used a vigorous agitation and small amounts of catalyst ( 0.05 g). The analysis of rates reaction provided an initial order 1 with respect to concentration and zero order with respect to pressure. Results are explained using a model of complex reactions of the first order.

Palavras-chave : Citronellal; Isopulegol; Citronellol; Acidity and Kinetics.

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