Abstract:
This research studies effect of acidity of solution on reaction between toluene and hydrogen peroxide using titanium silicalite-1 (TS-1) and TS-1 modified with different amount of Co catalysts. The catalysts are prepared by a hydrothermal method and characterized by XRD, FT-IR, XRF BET and NH3- TPD. The reaction is carried out at reaction temperature 70 and 90 °C in a stir slurry reactor. Hydrochloric acid is added to the liquid phase to decrease the self decomposition of hydrogen peroxide before reacting with toluene. Catalytic activity testing found that the reactions added with hydrochloric acid have higher conversion than reactions which no acid for all the catalysts studied. In addition, the addition of hydrochloric acid slightly decreases the productivity of o-cresol and p-cresol but significantly increases the formation of benzaldehyde. The conversion increases with the increase amount of hydrochloric acid added up to a level. Beyond that point the conversion decreases if the amount of hydrochloric acid added is further increased
