文献类型：会议论文

英文题名：Novel energy saving strategy for separating acetic acid - water in extractive distillation with N-methyl acetamide as entrainer

作者：You, Xinqiang[1];Peng, Changjun;Liu, Honglai

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

会议论文集：2nd International Seminar on Advances in Materials Science and Engineering (ISAMSE)

会议日期：JUL 28-30, 2017

会议地点：Singapore, SINGAPORE

语种：英文

摘要：The design of homogeneous extractive distillation for acetic acid (AA) dehydration with N-methyl acetamide (NMA) as entrainer was investigated. It belongs to the classification of 0.0-1. The main challenge is that NMA and AA will lead to another pinch point, probably leading to energy cost and total annual cost (TAC) increase. Through analyzing thermodynamic insight, we have proposed a new strategy: low recycling entrainer purity for the extractive distillation of class 0.0-1 with no univolatility line existing. The strategy could save energy cost by avoiding the approach of the pinch point between AA and NMA. We have run sequence iterative optimization method for the process optimization. The total eleven variables are optimized. Results show that energy consumption and TAC are reduced by 50.6% and 52.1%, respectively. The results also reveal that a suitable shift of the feed tray locations improves the efficiency of the separation, even when less entrainer is used.