Synthesis of butyl acetate catalyzed by novel nanosized SO_4~(2-)/TiO_2 catalyst

Nanosized SO2-4/TiO2 catalysts were synthesized by impregnating aqueous H2SO4 on anatase TiO2,which was prepared by a novel hydrothermal procedure.The texture properties and morphology of SO2-4/TiO2 catalysts were characterized by XRD,TG-DTG and TEM.Their catalytic activity was evaluated in the esterification of acetic acid with n-butanol.The effects of H2SO4 solution concentration,impregnating time and reaction time on esterification rate were investigated.The results showed that the esterification rate of 99.2% was obtained under the optimum condition as follows: H2SO4 solution concentration 1 mol·L-1,impregnating time 12 h and reaction time 180 min.The obtained catalyst possessed excellent catalytic properties and reusability.