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从聚合反应动力学出发,对丙烯间歇液相本体聚合工业装置建立数学模型,采用PR状态方程进行汽液平衡计算。链增长速率常数k_p、链转移速率常数K_t由质均分子量为20万及30万2个品牌的生产条件及产品性质去拟合得到。应用拟合出的参数,对质均分子量为40万的产品的生产工艺条件进行模拟,模拟结果与实际相比为:聚合物的产量误差0.66%,质均分子量误差2.07%,模拟结果与实际较为吻合。并对反应过程中变量随时间变化情况进行分析,得出聚合物质量、氢气浓度、液相体积等随时间的变化规律,对实际生产工艺的开发与改进具有指导意义。
Based on the kinetics of polymerization, a mathematical model was established for the commercial unit of propylene batch bulk polymerization. The PR state equation was used to calculate the vapor-liquid equilibrium. Chain growth rate constant k_p, chain transfer rate constant K_t by the mass average molecular weight of 200,000 and 300,000 2 brand production conditions and product properties to fit. The simulated parameters were used to simulate the production process of the products with mass average molecular weight of 400000. The simulation results were as follows: the yield of polymer was 0.66%, the mass average molecular weight was 2.07%, and the simulation results were Anastomosis. The changes of the variables with the passage of time during the reaction process were analyzed. The variation of polymer quality, hydrogen concentration and liquid phase volume with time were obtained. It is instructive for the development and improvement of the actual production process.