石油化工2013，Vol.42Issue(7)：775-779,5.
萃取精馏分离环氧丙烷-水-甲醇混合物的模拟
Simulation of Separating Propylene Oxide-Water-Methanol Mixture by Extractive Distillation
摘要
Abstract
An extractive distillation process with two columns and propylene glycol (PG) as the extractant for separating propylene oxide(PO)-water-methanol mixture was simulated by using Aspen Plus process simulation software and NRTL model.The effects of major design parameters,such as mass ratio of extractant and feed(solvent ratio),theoretical tray number of extractive distillation column,crude PO feeding position and extractant feeding position,extractant feeding temperature and reflux ratio,on the separation were investigated.Aimed at PO mass fraction of 99.99％(w) in the product,the optimal process conditions were solvent ratio of 0.45,theoretical tray number of extractive distillation column of 30,crude PO feeding position of the 20th tray,extractant feeding position of the 5th tray,extractant feeding temperature of 45℃ and reflux ratio of 0.14.Under the conditions,the PO recovery ratio and the heat duty for per ton product reached 99.99％ and 0.936 GJ/ t,respectively.关键词
环氧丙烷/甲醇/水/丙二醇/萃取精馏/流程模拟/Aspen Plus软件Key words
propylene oxide/ methanol/ water/ propylene glycol/ extractive distillation/ process simulation/ Aspen Plus software分类
化学化工引用本文复制引用
胡松,杨卫胜..萃取精馏分离环氧丙烷-水-甲醇混合物的模拟[J].石油化工,2013,42(7):775-779,5.基金项目
国家重点基础研究发展计划项目(2009CB623500). （2009CB623500）
