摘要
讨论了溶剂加盐对乙醇 -水、叔丁醇 -水、异丙醇 -水 3种醇水体系的影响。常压下汽液平衡的实验结果表明溶剂加盐能够有效地提高醇对水的相对挥发度 ,在恒沸点处 3种醇水体系的相对挥发度分别是 2 56、2 68、2 67。所加的最优盐是CaCl2 和KAc。溶剂加盐的作用机理是溶剂和盐对醇水分子的双重作用 ,且作用力大小不同。
The influence of solvent with salts on three systems,ethanol water,tert butanol water and isopropanol water was discussed.The experimental results of vapour liquid equilibrium at normal atmosphere showed that the relative volatilities of alcohol to water which were 2 56,2 68 and 2 67 respectively for the three systems at azeotropic point were effectively raised by solvent with salts.The best salts were CaCl\-2 and KAc.The mechanism was the difference of actions to alcohol and water by solvent and salts at the same time.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2000年第5期307-309,共3页
Fine Chemicals
关键词
汽液平衡
溶剂加盐
醇水
vapour liquid equilibrium
solvent with salts
aqueous alcohol
