Abstract: A dynamic equilibrium stage model of the suspension catalytic distillation process for alkylation of benzene with C₁₂ olefins is developed.The prediction for steady-state based on the proposed mathematical model agrees with the steady-state experimental data and simulation results well.The stationary and dynamic models developed are used to simulate the influence of the location of benzene feed stream, disturbances of benzene and mixed hydrocarbon feed flow rates upon the suspension catalytic distillation system.Only one steady-state can exist in the system for the given conditions,and the last stage in reaction section is the optimal location of benzene feed stream.The system is stable for the imposed disturbances,and its anti-disturbance ability is very strong.