萃取精馏和精馏结合分离混合二氯苯的模拟及试验研究

Extractive distillation and distillation separation research of simulation and experient for mixture of dichlorobenzene

采用三对角距阵法模拟混合二氯苯萃取分离结果,考察物料进料位置、进料量、回流比及塔板数对分离过程的影响,优化分离过程的工艺条件,在回流比R=4∶1条件下,原料经萃取精馏和精馏结合分离,一次可得到99.5%以上的邻二氯苯和89.7%以上的对二氯苯,得率分别可达80%和97.9%以上,邻二氯苯分离过程能量消耗仅为精馏方法的28.7%;以二苯胺为萃取剂,进行萃取精馏和精馏试验,当溶剂比为1∶1,回流比R=4时,原料液经萃取精馏和精馏分离后,一次可得到99.5%以上的邻二氯苯和86.7%的对二氯苯,得率分别达到72%和83.5%,试验和模拟计算结果基本一致,为进一步放大试验提供依据。

Extractive separation results of dichlorobenzene was simulated by triangle matrix method,the effects of material position,feed quantities,reflux ratio and theoretical plate number,etc.,were discussed,and the technological conditions of separation process were optimized for further tests.More than 99.5% o-chlorobenzene and 89.7% p-dichlorobenzene were got once time by combination of extractive distillative and distillation,receive ratio separately was more than 80% and 97.9%,energy consumption of refining o-...