Operating Conditions And Intrinsic Kinetics Of Transalkylation Of Benzene With Di-Isopropyl-Benzene Over YSBH Catalyst

The reaction characteristics of transalkylation of di-isopropylbenzene with benzene over YSBH catalyst was studied in tubal stainless reactor that is Φ20×2×450mm. Based on experimental data, the intrinsic kinetic model of the reaction system was established. These investigations laid the engineering foundation for the establishment of suitable reaction conditions and the design of reactor.Single factor experimental method was employed to study the influence of reaction temperature(160℃-200℃), mole ratio of benzene with di-isopropylbenzene(7-15), liquid space velocity(1h-1-15h-1) on the transalkylation reaction. The experimental results show: (1) As temperature is up, the conversion of di-isopropylbenzene increased rapidly, but the selectivity of isopropylbenzene is down slightly; (2) The conversion of di-isopropylbenzene and the selectivity of isopropylbenzene is proportional to the mole ratio of benzene with di-isopropylbenzene, but the conversion of di-isopropylbenzene and the selectivity of isopropylbenzene are increasing slowly when mole ratio is beyond 9. (3) Space velocity has large influence on the conversion of di-isopropylbenzene and the selectivity of isopropylbenzene, the space velocity maybe is more suitable under 6h-1 based on selectivity of isopropylbenzene.N-propylbenzene is the main by-product that influences the product quality. Further researches were made to study the relationship between temperature and n-propylbenzene-producing reaction. The results show that when temperature is over 240℃, n-propylbenzene is increasing rapidly. So the temperature is not too high for transalkylation reaction.According to above experimental results and the possible range of industrial operating conditions, the intrinsic kinetic experiments were carried out under the following conditions: 160℃-220℃, 3MPa and mole ratio of benzene with di-isopropylbenzene 7-15. By means of Simplex Optimal Method, the kinetic model of transalkylation of di-isopropylbenzene with benzene was established, which can be consistent with experimental data. The intrinsic kinetics equation established is as follows:...