Solubility of hydroxybenzoic acid isomers in ethyl acetate expanded with CO2

被引：12

作者：

Liu, ZM ^{[1
]}

Li, D ^{[1
]}

Yang, GY ^{[1
]}

Han, BX ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 2000年 / 18卷 / 02期

基金：

中国国家自然科学基金;

关键词：

CO(2); solubility; hydroxybenzoic acid; antisolvent;

D O I：

10.1016/S0896-8446(00)00053-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The solubility of p-hydroxybenzoic acid (p-HBA) and o-hydroxybenzoic acid (o-HBA) in ethyl acetate expanded with CO(2) were determined at 308.15 and 318.15 K in the pressure range from 2.0 to 8.5 MPa. Both the solubility of p-HBA and o-HBA in the liquid phase decrease with pressure, especially at the higher pressures. However, the solubility of o-HBA in the CO(2) + ethyl acetate mixture is much higher than that of p-HBA under the conditions reported in this study. The CO(2) mol fraction in the liquid phase was also investigated, which increased with pressure and decreased with temperature. Peng-Robinson equation of state was used to correlate the CO(2) mol fraction and solubility of the two solutes in the liquid phase. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：111 / 119

页数：9

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