文献类型：期刊文献

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[1]; Liu, Honglai[1]

机构：[1] State Key Laboratory of Chemical Engineering, Department of Chemistry, East China University of Science and Technology, Shanghai, 200237, China

年份：2017

卷号：231

期号：1

外文期刊名：IOP Conference Series: Materials Science and Engineering

收录：EI(收录号：20174604404960)

语种：英文

外文关键词：Energy utilization - Optimization - Ascorbic acid - Iterative methods - pH - Energy conservation - Distillation

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. ? Published under licence by IOP Publishing Ltd.