摘要
在超临界CO_2中分别采用乙醇、丙酮、正己烷作夹带剂,并在压力10-30MPa;温度308-318K下测定了联苯、二苯胺和苯甲酸的溶解度。根据溶剂化缔合的观点,用缔合状态方程(AEOS)进行数据处理,取得较满意结果。
A flow apparatus for measuring the solubility of a solid solute in a supercritical fluid with a small amount of entrainers was established. Ethanol, acetone and n-hexane were selected as entrainer, respectively, the solubilities of biphenyl, diphenylamine and beuzoic acid in supercritical CO_2 with one of these eutrainers were obtained in a pressure range of 10-30MPa and temperature range of 308-318K. A solvolytic association theory was proposed to explain the mechanism of entrainer effect and the experimental results were reasonably analysed. According to the solvolytic association theory, the association equation of state was adopted in correlating the experimental data with good accuracy.
关键词
夹带剂
萃取
溶剂化缔合
超临界流体
分离
supercriticality
entrainers
extraction
solvolytic association
