摘要
针对异丁醇(IBA)酯化反应合成乙酸异丁酯(IBAc)中IBA-IBAc共沸物体系的分离问题,以N,N-二甲基乙酰胺为萃取剂,采用Aspen Plus软件对隔壁萃取精馏塔(EDWC)二塔等效、三塔等效模型及常规萃取精馏工艺分离IBA-IBAc共沸物体系进行了模拟。以年度总成本(TAC)最低为目标函数,对上述模型参数进行全局优化,在保证IBAc,IBA含量不低于99.3%(x)且回收率不低于99.3%的前提下,确定了各模型的最佳工况参数。模拟结果表明,两种EDWC等效模型均可用于模拟IBA-IBAc共沸物体系的分离,其中二塔等效模型的能耗及TAC最低,相比于常规萃取精馏工艺,TAC节约11.36%,该模型更适用于IBA-IBAc共沸物体系的分离。
To address the separation of the isobutanol(IBA)-isobutyl acetate(IBAc)azeotrope in the synthesis of IBAC via IBA esterification,N,N-dimethylacetamide was used as an extractant,and the separation of the IBA-IBAc azeotrope was simulated by means of Aspen Plus simulation software using two-and three-tower equivalent models of extractive distillation dividing wall column(EDWC),as well as a conventional extractive distillation model.By taking the lowest total annual cost(TAC)as the objective function,the above model parameters were globally optimized,and the optimal operating parameters for each model were determined under the premise that the molar fraction and recovery rate of IBAC and IBA were not less than 99.3%.The results show that both the two-tower equivalent and three-tower equivalent models of EDWC can be used to simulate the separation of the IBA-IBAc azeotrope.Specifically,the two-tower equivalent model exhibits the lowest energy consumption and TAC.Compared to conventional extractive distillation,this system reduces the TAC by 11.36%,which is more suitable for the separation of the IBA-IBAc azeotrope.
作者
邵圣娟
张云凤
李晓红
张毅恒
焦纬洲
SHAO Shengjuan;ZHANG Yunfeng;LI Xiaohong;ZHANG Yiheng;JIAO Weizhou(Department of Chemistry and Chemical Engineering,Taiyuan Institute of Technology,Taiyuan 030008,China;Key Laboratory of Chemical Process Intensification of Shanxi Province,North University of China,Taiyuan 030051,China)
出处
《石油化工》
北大核心
2025年第7期929-936,共8页
Petrochemical Technology
基金
太原工业学院引进人才科研资助项目(2023KJ014)。
关键词
异丁醇
乙酸异丁酯
隔壁塔
萃取精馏
年度总成本
isobutanol
isobutyl acetate
dividing wall column
extractive distillation
total annual cost
作者简介
邵圣娟(1987-),女,山东省济南市人,博士,副教授,电话:15003431301,电邮:shaosj_tit@163.com。
