Apertura del Grupo Epóxido en un Sistema Reaccionante Heterogéneo Líquido-Líquido-Sólido: Reactividad Catalítica Intrínseca

A. CAMPANELLA; M.A. BALTANÁS

Gramado (Brasil)

Simposio; XX Simposio Iberoamericano de Catálisis; 2006

This work analyzes the deletereous oxirane ring opening reactions suffered by attack onto epoxidized soybean oil (ESBO) by some of the relevant constituents of the reaction system, hydrogen peroxide and solvated acetic acid, when a gel-type strong acid ion exchange resin (Amberlite IR-120, 8% crosslinking) is used as an heterogeneous catalyst for the industrial synthesis of ESBO. Each of the mass transfer and chemical reaction steps occuring in these liquid-liquid-solid catalyst systems were studied, including partitition equilibria, when the organic droplets are the disperse phase in the aqueous medium. The obtained results ensure that within the experimental conditions typical of a commercial process (T = 60-85 ºC; [H2O2]o, aq = 10-30 wt.%; resin wt.% = 2.8-8.5) both ring-opening reactions are under kinetic control. Besides, it was confirmed that the surface protons of the resin particles are responsible for the undesired attack onto the epoxide functional groups.