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Citation: LIN Jin-Qing, JIN Chun-Ying, TAN Ping-Hua, DONG Jun-Fang. Phase Separation and Mechanism of Hydrophilic Organic Phase-Salt Aqueous Solution System[J]. Chinese Journal of Applied Chemistry, ;2005, 22(11): 1203-1207. shu

Phase Separation and Mechanism of Hydrophilic Organic Phase-Salt Aqueous Solution System

1.
College of Material Science and Engineering, Quanzhou 362021

Corresponding author: LIN Jin-Qing,
Received Date: 12 January 2005
Available Online: 10 August 2005
Fund Project: 福建省自然科学基金(E0210022)资助课题 (E0210022)

Phase separation and mechanism of a hydrophilic organic phase-salt aqueous solution system were studied.A new method for measuring ΔV was established,and a new criterion to judge the phase separation ability was proposed,which is called as relative density criterion.According to the criterion,the less the relative density of upper phase vs pure organic solvent,the greater the phase separation ability.Factors affecting phase separation ability such as the kind and the concentration of organic solvent and salt and pH of the salt aqueous solution were investigated in detail.It was found that the phase separation process of the hydrophilic organic phase-salt aqueous solution system is a competition of organic solvent with salt for water molecules,and the phase separation ability is directly depended on the hydration ability of organic solvent and the salting out ability of salt,the greater the hydration ability of organic solvent,the poorer the phase separation ability,and the greater the salting out ability of salt,the stronger the phase separation ability,and the pH value of the aqueous solution has influence on phase separation ability.
- hydrophilic organic phase,
- salt aqueous solution phase,
- two-phase system,
- phase separation mechanism,
- phase separation ability
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