| Based on an isothermal integral reactor (reactor dimension:Φ26×2.5 mm, L 450 mm), the most suitable catalyst for the liquid-phase alkylation that isopropylbenzene with propylene for diisopropylbenzene sythesis was studied, and the best choice was YSBH-4 catalyst. Then the effects of temperature, isopropylbenzene/propylene molar ratio and liquid space velocity on the alkylation reaction process (including selectivity and conversion) were investigated by means of the single-factor experimental method under a wide experiment range(temparature 140～220℃, liquid space velocity 6～24h-1, isopropylbenzene/propylene molar ratio 4 16). And the orthogonal text design was employed to investigate the global effect of these factors above on thalkylation process and the suitable operating conditions were determined as follows: temperature of 160℃, isopropylbenzene/propylene molar ratio of 14 and space velocity of 9 h-1.Secondly, the thermodynamic properties and reaction network of this reaction system were studied systematically based on the experimental results. As a result, the main reaction and main side reactions were determined and the reaction network for alkylation of isopropylbenzene with propylene wasproposed, which could explain the experimental phenomena reasonably in thispaper.Finally, Power Law type rate equations of this system were established on the basis of the reaction network proposed and the data of the kinetic experiment carried out following the conditions: temperature of 140℃～220℃, isopropylbenzene/propylene molar ratio of 3.1～17.1 and the pressure 3.0 MPa, the parameters of the kinetic models were searched and estimated by means of Simplex optimal method . The results of the Statistical analysis and the residual distribution test showed the Power Law type rate equations here was consistent with the experimental data, so it was suitable and reliable.
|
PDF Full Text Request