Study on process of chlorination of benzene in the three-phase catalytic-distillation column with vapor diffluence

In a new type of catalytic-distillation tower, the effect of different catalyst packing mode on the catalytic distillation of benzene chlorination was studied. In order to ensure the obtained chloride benzene higher than 95% and the remained benzene less than 1% in the liquid mixture of the tower bottom, the proper diffluence ratio of the bypass and the proper chlorine gas flow rate were found as 30%-40% and 600 mL·min^-1, respectively. Under different catalyst packing mode and chlorine flow rate, the chlorobenzene concentration and temperature distribution in the whole tower at the end of the experiment were measured. The measured data are helpful for the establishment of the mathematics model used for simulating or designing the industrial catalytic-distillation tower. Finally, the pressure drops of the experimental tower were measured and those of the industrial catalytic-distillation tower were estimated too.