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《Journal of Nanjing Normal University(Engineering and Technology)》 2005-02
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Selection of Composite Extractive Distillation Solvent for Ethyl Acetate-Ethanol-Water

GU Zhenggui, LIN Jun (School of Chemistry and Environment Science,Nanjing Normal University,Jiangsu Nanjing 210097, China)  
The composite extractive separation (different extractive agents at different positions) of ethyl acetate and water is proposed for the aims of simplifying production technology, reducing energy consumption agents and once raising the concentration of ethyl acetate to over 99.5%. All kinds of agents composed of single, binary, ternary components are summarized. Upon the shortages of systematic researches and comparisons of extractive agents, in the paper extractive agents are classified into twelve types from the interactions between molecules, electrostatic force, dispersion force, hydrogen bond, et al. The effects of all kinds of extractive agents on separation of ethyl acetate and water system are analyzed, and polybasic alcohol, water, carboxylic acid, amides and ketone are chosen as separation agents for ethyl acetate and water system. Affection of temperature and solvent ratio on relative volatility is studied, with measured data from the checked pot, combined with other influencing factors, glycerol is selected as extractive solvent for ethyl acetate/water system.
【Key Words】： extractive distillation solvent ethyl acetate ethanol water relative volatility
【CateGory Index】： TQ225.241
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