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8627911 
Journal Article 
新型萃取剂回收DMF的模拟研究及经济分析 
Zhang, RB; Zhu, ZH 
2020 
China National Chemical Information Center 
40 
4 
218-221 
Chinese 
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. © 2020, China National Chemical Information Center. All right reserved. 
Aspen Plus simulation; Extraction; High boiling point solvent; N, N-dimethylformamide; Rectification