集成精馏分离混合硝基氯苯的工艺设计及模拟计算

Progress Design and Simulation of Integrated Distillation for Separating Mixed Nitrochlorobenzene

介绍了硝基氯苯3种同分异构体的性质、用途及生产现状,分析了混合硝基氯苯分离的难点,对目前已有的分离方法进行了总结,指出了各种分离方法的优点和不足.提出了侧线精馏-萃取精馏-结晶相结合的新型集成精馏分离混合硝基氯苯的工艺路线.通过Aspen plus模拟软件对侧线精馏过程进行了模拟计算,并与传统过程进行了比较,结果表明:侧线精馏在产品纯度、得率等方面与传统过程基本相当,在设备投资上比传统工艺降低一半,同时能耗也明显下降.

The nature,purpose and production status of the three kinds of nitrochlorobenzene isomers were summarized in this paper.Methods of separating mixed nitrochlorobenzene were reviewed and analyzed.A new integrated technology including lateral line distillation-extraction distillation-crystallization was raised for separating mixed nitrochlorobenzene.The lateral line distillation process was simulated by Aspen plus simulation software.The result shows that lateral line distillation process is better than traditional distillation process.