用ASPEN模拟结果优化甲醇和碳酸二甲酯共沸物萃取精馏  

Simulation and Optimization of Extractive Distillation Process for Methanol-DMC Azeotrope by Aspen Plus Software

作　　者：陶荣 杨万典 仲庆 

机构地区：[1]中建安装工程有限公司石化设计院,南京210049

出　　处：《化工设计》2015年第3期9-11,5,共4页Chemical Engineering Design

摘　　要：介绍酯交换法生产聚碳酸酯工艺中的副产品,甲醇和碳酸二甲酯共沸物的分离。以萃取精馏工艺,选用苯酚为萃取剂,利用萃取精馏塔和萃取剂再生塔精馏回收,分离甲醇和碳酸二甲酯共沸物。采用Aspen Plus软件中的设计规定和灵敏度分析工具对分离流程进行模拟设计和优化。从结果分析:可实现甲醇和碳酸二甲酯的工业化分离,并将再生塔回收的萃取剂重复循环利用,具有很好的工业价值。考察萃取剂进料位置、萃取剂与恒沸物的摩尔比和回流比等操作参数对分离性能的影响,给出各塔的优化操作参数,总结其热负荷和分离效果。This paper describes the separation of methanol and dimethyl carbonate azeotrope which are the by-products of polycarbonate production based on transesterification process. Based on the extractive distillation process,phenol is chosen as the extraction agent for separation of azeotropic of methanol and dimethyl carbonate,using extractive distillation column and extractant regeneration tower for distillation and recovery. The simulation design and optimization for separation process is carried out by using design specification and sensitivity analysis tools of Aspen Plus software.The results show that the separation of methanol and dimethyl carbonate can be achieved,and the extractant recovered from regeneration column can be recycled,with good industrial value. This paper also examines the impact of the extraction agent feed location,the molar ratio of extraction agent and the azeotrope,as well as the reflux ratio and other operating parameters on the separation performance. This paper gives optimum operation parameters of each tower and makes summary for heat load and separation effect.

关 键 词：萃取精馏 共沸物 模拟 优化 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业] TQ028.32