The catalysts of nanometer TiO2/BuOH and hydrous TiO2 were prepared by the
liquid-phase method from Ti(SO4)(2). The properties of the catalysts were c
haracterized by TG-DTA, IR, XRD, TEM methods. The results showed that nanom
eter TiO2/BuOH was anatase particles with 10 nm X 20 nm. The main product i
n styrene epoxidation with t-butyl hydroperoxide(TBPH) was styrene epoxide,
by-product was phenylformaldehyde under the condition of 80 degreesC for 6
h. Hydrous TiO2 prepared below 260 degreesC was non-crystal powder and con
verted into anatase particles with 10 nm X 300 nm when it was roasted at 50
0 degreesC. The catalytic activity of 10 nm X 300 nm anatase particles had
only 50% that of particles with 10 nm X 20 nm. The centers of acid on the c
atalyst surface made the epoxide selectivity decrease obviously. The order
of the influence of solvent on epoxidation reaction: 1, 2-dichloroethane >
butanol > cyclohexanone > methyl-cyclohexane > cyclohexanol > acetic acid.