Simulation and Optimization of Methylallyl Chloride Separation Process
Methylallyl chloride can be prepared by gas-phase catalytic dehydrochlorination of 1,2-dichloro-2-methylpropane,but further separation and purification are required.Based on the crude product of the gas-phase catalytic dehydrochlorination reaction of 1,2-dichloro-2-methylpropane,Aspen Plus software is used to simulate and optimize the vacuum double column distillation process.The physical property method adopts UNIFAC model.In order to verify the reliability of the model,the calculated values of the phase equilibrium data of vinyl chloride and 1,1,2-trichloroethane with similar structural systems are compared with the literature values.The maximum relative deviation of y1 in the results is 0.69％,indicating that the model has a certain degree of reliability.Under the design goal of achieving a mass fraction of over 99.5％and a yield of over 90.0％for methylallyl chloride,the effects of operating parameters such as theoretical plate number,feed position,reflux ratio,top extraction rate to feed mass flow rate ratio,and operating pressure on the mass fraction and yield of methylallyl chloride products are explored.The optimal operating parameters for each column are obtained,and the steam and cooling water consumption of each column are calculated.The calculation results show that under optimal conditions,the mass purity of methylallyl chloride products can reach 99.56％,and the yield can reach 90.21％.
万方数据
维普
