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Diethylbenzene process for the alkylation of ethylbenzene with ethylene production of 1500 tons on the diethylbenzene plant , equipped with magnesium modified HZSM-5 zeolite catalyst in the fixed bed reactor ethylbenzene alkylation reaction conditions and macro- dynamics study . Investigated in a fixed - bed reactor , the reaction temperature , ethylbenzene WHSV and the molar ratio of the alkylation reaction , and the analysis and discussion of the optimal process conditions . Arrhenius equation of the diethylbenzene the reaction kinetic equation of o, m, and A have been studied to obtain a reaction order reaction rate constant , activation energy and Arrhenius constant , thus establishing the dynamics equation. The results show that , under different process conditions , the product o , between diethylbenzene content with the content of diethylbenzene temperature increased . O, m diethylbenzene reaction order , activation energy and A tired Arrhenius constants are greater than diethylbenzene , high reaction temperature and a lower the ethylbenzene quality airspeed , the ratio of raw materials are not conducive to control the concentration of o - , m- diethylbenzene . O-, m - diethylbenzene content is too high , increasing the difficulty of product separation , and can not obtain high purity product diethylbenzene . Kinetic results are consistent with the actual production situation . Using the HYSYS software alkylated product Distillation simulation , determined the number of theoretical plates and appropriate reflux ratio based on the product quality requirements . Analog o , concentration of between diethylbenzene appropriate . Simulation results show that the concentration of the o - , m- diethylbenzene difficult than 0.5 %, otherwise difficult to obtain a purity of more than 99% of diethylbenzene .
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