N,N-二乙基乙醇胺对水醋酸体系相对挥发度的影响

Effect of N,N-Diethylethanolamine on Relative Volatility of Water-Acetic Acid System

以N,N二乙基乙醇胺作萃取精馏溶剂,研究了溶剂的加入对水醋酸相对挥发度的影响,试验结果表明该溶剂的加入明显提高了水对醋酸的相对挥发度。运用红外光谱分析了N,N二乙基乙醇胺与醋酸的作用机理,该溶剂与醋酸形成了离子型络合物。

N,N-diethylethanolamine as a third component termed an entrainer was added into the mixture of acetic acid and water. The relative volatility was determined, and results showed that this entrainer greatly improved the relative volatility between acetic acid and water components, thus permitting the separation of the acetic acid from aqueous solution. The separation mechanism was analyzed through infrared spectra technique. The results revealed that an ionic complex was formed between N, N-diethylethanolamine and acetic acid molecules.