Catalytic activity of Silica-alumina-SiO₂ 85 %·Al₂O₃ 15 % was determined by the disproportionation reaction of toluene, and the results were compared with those obtained by Mamoru, who used SiO₂ 75 %·Al₂O₃ 25 % as the catalyst.
Under the conditions such as reaction temperature, ; 550 ℃, particle size of the catalyst, ; 60∼140 mesh, which were some what different from those used by Mamoru, it was found that the rate of disproportionationreaction of toluene was about five times as rapid as Mamoru had found.
Helium being used as the carrier gas, activation energies measured were 17.3 [kcal/mole] and 22.0 [kcal/mole] for toluene and xylene, respectively. The values of adsorption energies measured at 180∼330 ℃ were 9.42 [kcal/mole], 10.4 [kcal/mole] and 9.08 [kcal/mole] for benzene, toluene and xylene respectively.
Catalyst which was treated with sodium carbonate was discussed to Maxted theory for catalyst poisoning.