Process evaluation on the separation of ethyl acetate and ethanol using extractive distillation with ionic liquid
Process evaluation on the separation of ethyl acetate and ethanol using extractive distillation with ionic liquid
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离子液体萃取精馏分离乙酸乙酯和乙醇的工艺评价
DOI：
10.1016/j.seppur.2017.03.011
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发表时间：
2017-06
影响因子：
8.6
通讯作者：
Wang Yinglong
中科院分区：
文献类型：
--
作者：
Zhu Zhaoyou;Ri Yongsaeng;Jia Hui;Li Xin;Wang Yong;Wang Yinglong
以离子液体为溶剂，对乙酸乙酯和乙醇的萃取精馏分离过程进行了工艺设计和模拟计算，在选择合适的离子液体溶剂的基础上，得到了带溶剂回收系统的萃取精馏过程的设计参数。通过对白杨Plus萃取精馏分离乙酸乙酯和乙醇的过程模拟，考察了离子液体萃取精馏的可行性。在白杨Plus数据库中创建了四种离子液体[EMIM][MeSO 3]、[EMIM][MeSO 4]、[BMIM][CF 3 SO 3]和[EMIM][BF 4]，并具有若干热力学和物理性质参数，以允许通过MAPAC-Lei热力学方法来模拟该过程。结果表明，以[EMIM][MeSO 3]为溶剂的闪蒸-汽提混合再生工艺是萃取精馏分离乙酸乙酯和乙醇的最佳方案。通过灵敏度分析对分离工艺进行了优化，并以年总费用（TAC）为基础对优化设计参数进行了经济评价。
This paper provides process design and simulation methodology for the separation of ethyl acetate and ethanol by extractive distillation using ionic liquids (ILs) as solvents and obtains the design parameters of extractive distillation process with solvent recovery system on the basis of a suitable IL solvent. The feasibility of IL-extractive distillation was examined via process simulation for the separation of ethyl acetate and ethanol in Aspen Plus. Four ILs [EMIM][MeSO3], [EMIM][MeSO4], [BMIM][CF3SO3] and [EMIM][BF4] were created in Aspen Plus database with several thermodynamic and physical property parameters to allow the process to be simulated via the UNIFAC-Lei thermodynamic method. The results show that the separation process containing the hybrid regeneration system of flash tank and stripper with [EMIM][MeSO3] as a suitable solvent is the best option in extractive distillation for the separation of ethyl acetate and ethanol compared with other ILs from the analysis of relative volatilities. The separation process was optimized by sensitivity analysis and the optimal design parameters were verified by economic evaluation based on the total annual cost (TAC).
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