熔融酯交换法制备聚碳酸酯全流程模拟与优化  

Simulation and optimization of polycarbonate in melt polycondensation

作　　者：毕丰雷 胡帅[1] 杨卫胜[1] Bi Fenglei;Hu Shuai;Yang Weisheng(Sinopec Shanghai Research Institute of petrochemical Technology,Shanghai 201208,China)

机构地区：[1]中国石化上海石油化工研究院,上海201208

出　　处：《石油化工》2021年第1期40-47,共8页Petrochemical Technology

摘　　要：以双酚A(BPA)和碳酸二苯酯(DPC)熔融酯交换法制备聚碳酸酯(PC)的连续聚合反应为研究对象,基于Aspen Plus软件中的Polymer Plus平台,借助Fortran子程序,耦合终缩聚过程的反应与传质特性,构建了PC连续熔融缩聚反应的全流程模型,对PC连续聚合进行了全流程稳态模拟与优化。分析了主要工艺参数对PC连续聚合反应过程的影响。计算结果表明,DPC和BPA的优化进料摩尔比为(1.059~1.075)∶1。优化工艺条件为:酯化釜温度160~170℃,容积0.4~0.6 m3;第一预缩聚釜温度187~203℃,压力12~14 kPa,容积0.12~0.15 m3;第二预缩聚釜温度235~245℃,压力3~4 kPa,容积0.2~0.3 m3;第三预缩聚釜温度255~265℃,压力0.05~0.1 kPa,容积0.3~0.4 m3;终缩聚釜温度270~275℃,压力0.04~0.05 kPa,直径0.5~0.6 m,长度为2.0~2.5 m。在优化工艺条件下进行连续聚合,PC终产品的分子量由14500左右提高到25836。流程模拟计算结果与文献报道值吻合良好,可用于指导工业装置设计和操作优化。Based on the process flow simulation software Polymer Plus,the melt polycondensation process of polycarbonate(PC)prepared by bisphenol-A(BPA)and diphenyl carbonate(DPC)was studied.By virtue of Fortran subroutine,the characteristic of mass transfer was coupled into the polycondensation process,and the full process flow model was built.The effect of the main process parameters on continuous polycondensation process of PC was analyzed.The results indicate that the optimized feed molar ratio of DPC and BPA is(1.059-1.075):1.The optimized process conditions are that for esterification reactor is 160-170℃,0.4-0.6 m3;for first prepolycondensation reactor is 187-203℃,12-14 kPa,0.12-0.15 m3;for second prepolycondensation reactor is 235-245℃,3-4 kPa,0.2-0.3 m3;for third prepolycondensation reactor is 255-265℃,0.05-0.1 kPa,0.3-0.4 m3;for final polycondensation reactor is 270-275℃,0.04-0.05 kPa,diameter 0.5-0.6 m,length 2.0-2.5 m.Based on the optimized process conditions,the final number-average molecular weight of PC was increased from 14500 to 25836.The simulation results were similar to the reported experimental value for the final PC products,which provided a guidance in the plant design and operation optimization and brought high industrial application value.

关 键 词：聚碳酸酯 缩聚 流程模拟 优化 Polymer Plus 

分 类 号：TQ316.4[化学工程—高聚物工业]