摘要
采用Aspen Plus对甲醇-甲乙酮共沸物萃取精馏过程进行模拟和优化,并利用灵敏度模型分析工具得到萃取精馏塔的最佳操作条件:溶剂比为0.15,[DMIM][NTf_(2)](1-癸基-3-甲基咪唑双三氟甲磺酰亚胺盐)进料量为15 kmol/h,进料位置为第3块塔板,全塔理论塔板数为23,回流比为0.6,甲醇和甲乙酮的混合原料进料位置为第19块塔板.从萃取精馏塔顶部得到物质的量分数大于0.9999的甲醇,从溶剂回收塔顶部得到物质的量分数为0.9999的甲乙酮,满足分离要求.此外,对[DMIM][NTf_(2)]进行热稳定性分析,发现其热分解温度高于溶剂回收塔塔釜温度,即可实现绿色回收并循环利用.
The extractive distillation process of methanol-methyl ethyl ketone azeotrope was simulated and optimized by Aspen Plus,and the optimal operating conditions of the extractive distillation column were obtained by the sensitivity model analysis tool.The solvent ratio was 0.15,[DMIM][NTf_(2)]feed amount was 15 kmol/h,the feeding location of[DMIM][NTf_(2)]was the 3rd stage,the theoretical number of trays in the whole column was 23,mole reflux ratio was 0.6,and the feeding location of methanol and methyl ethyl ketone mixture was the 19th stage.The methanol with a mole fraction greater than 0.9999 was obtained from the top of the extractive distillation column,and the methyl ethyl ketone with a mole fraction of 0.9999 was obtained from the top of the solvent recovery column,which met the separation requirements.In addition,the thermal stability analysis of[DMIM][NTf_(2)]shows that its thermal decomposition temperature is higher than that of the solvent recovery column,which indicated that it could be recovered and recycled.That is,[DMIM][NTf_(2)]has a good industrial application prospect as the extractant in the separation of methanol-methyl ethyl ketone.
作者
李金童
吴天照
何鑫
邢庆浩
伞丽丽
房鸿
王洋洋
汪玉红
张弢
LI Jintong;WU Tianzhao;HE Xing;XING Qinghao;SAN Lili;FANG Hong;WANG Yangyang;WANG Yuhong;ZHANG Tao(College of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China)
出处
《沈阳化工大学学报》
2025年第1期35-40,共6页
Journal of Shenyang University of Chemical Technology
基金
国家自然科学基金(21576116)。
