变压精馏分离异丁醇-乙酸异丁酯工艺模拟

发布时间：2018-06-23 08:22

本文选题：异丁醇 + 乙酸异丁酯　；参考：《现代化工》2017年12期

【摘要】：基于异丁醇-乙酸异丁酯共沸体系的特性分析,提出了建立变压精馏过程分离异丁醇-乙酸异丁酯的工艺方法。利用Aspen Plus模拟软件,以产品异丁醇和乙酸异丁酯质量分数为约束变量,过程能耗最低为目标函数,对该体系进行了工艺模拟与优化,考察了理论板数、进料位置、回流进料比等参数对分离效果的影响。结果表明最优条件为:减压塔操作压力20 k Pa,理论塔板数60,进料位置30,回流比8.5;常压塔操作压力100 k Pa,理论塔板数30,进料位置22,回流比5。在此条件下,得到质量分数不低于0.998的异丁醇和乙酸异丁酯产品,回收率均达到99.9%以上。
[Abstract]:Based on the analysis of the characteristics of iso-butanol-isobutyl acetate azeotropic system, a process for the separation of isobutanol-isobutyl acetate from isobutanol-isobutyl acetate by pressure swing distillation was proposed. Using Aspen Plus simulation software, the process simulation and optimization of the system were carried out with the mass fraction of isobutanol and isobutyl acetate as constraint variables and the minimum process energy consumption as the objective function. The number of theoretical plates and the feed position were investigated. The influence of reflux feed ratio and other parameters on the separation effect. The results show that the optimal conditions are as follows: the operating pressure of the vacuum tower is 20 kPA, the number of theoretical trays is 60, the feed position is 30, the reflux ratio is 8.5, the operating pressure of the atmospheric column is 100 kPa, the number of theoretical trays is 30, the feed position is 22, and the reflux ratio is 5. Under these conditions, isobutanol and isobutyl acetate with a mass fraction of more than 0.998 were obtained, and the recoveries were over 99.9%.
【作者单位】：吉林化工学院石油化工学院;
【基金】：吉林省重点科技攻关资助项目(20170204009GX)
【分类号】：TQ028.31

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