萃取-精馏方法可以有效降低回收DMF所需要的能耗。考察了不同高沸点萃取剂正辛醇、正癸醇、邻苯二甲酸二乙酯、邻苯二甲酸二丁酯对DMF的萃取能力，应用Aspen Plus软件获得液液平衡数据并得到三元相图，根据已知DMF质量分数的废水确定合适的萃取剂为邻苯二甲酸二乙酯。通过模拟详细分析了过程中各个因素对DMF回收率的影响，并确定最佳的操作条件。与传统精馏工艺相比，萃取-精馏法所需能量更少。最后运用MATLAB对精馏工艺进行经济核算，发现能耗为该工艺的主要成本原因。

Extraction-rectification method can effectively reduce the energy consumption needed for recycling DMF from wastewater.Extraction abilities of high boiling point extractants to DMF from wastewater are investigated,including n-octanol,n-nonanol,diethyl phthalate and dibutyl phthalate.Aspen Plus software is used to obtain their liquid-liquid equilibrium data and ternary phase diagrams.Diethyl phthalate is determined as the appropriate extractant according to wastewater with known DMF concentration.The influences of various factors in the process on the recovery rate of DMF are analyzed in detail,and the optimal operating conditions are determined.Extraction-rectification process requires less energy than conventional rectification processes.Finally,the economic accounting is performed for the rectification process by using MATLAB.It is found that energy consumption is the main cost of the process.

张锐标(1994-),男,硕士生