物理化学学报 >> 2011, Vol. 27 >> Issue (06): 1300-1304.doi: 10.3866/PKU.WHXB20110616

热力学，动力学和结构化学 上一篇    下一篇

超临界二氧化碳微乳液增溶多元醇特性

周丹, 喻文, 徐琴琴, 银建中   

  1. 大连理工大学化工机械学院, 精细化工国家重点实验室, 辽宁 大连 116024
  • 收稿日期:2010-11-01 修回日期:2011-02-22 发布日期:2011-05-31
  • 通讯作者: 银建中 E-mail:jzyin@dlut.edu.cn
  • 基金资助:

    国家自然科学基金(20976028)资助项目

Solubilization of Polyalcohol in Supercritical CO2 Microemulsion

ZHOU Dan, YU Wen, XU Qin-Qin, YIN Jian-Zhong   

  1. State Key Laboratory of Fine Chemicals, School of Chemical Machinery, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China
  • Received:2010-11-01 Revised:2011-02-22 Published:2011-05-31
  • Contact: YIN Jian-Zhong E-mail:jzyin@dlut.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20976028).

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摘要：

用2.5%、5.0%和7.5% (w)的1,3-丙二醇(1,3-PDO)稀水溶液为模型物质, 以超临界二氧化碳为连续相, 以琥珀酸二酯磺酸钠(AOT)为表面活性剂, 乙醇为助剂, 在压力为6.9-10.3 MPa的范围内, 温度为30-50 °C时, 分别对三种AOT浓度下的四元体系AOT/CO2/乙醇/水和五元体系AOT/CO2/乙醇/1,3-PDO/水的热力学行为进行了实验研究. 实验结果证明: 通过合理调控系统的操作条件, 可以形成热力学稳定的超临界二氧化碳微乳液, 并能实现选择性增溶1,3-丙二醇. 该结果可为指导工业生产提供依据.

关键词: 超临界二氧化碳微乳液, 琥珀酸二酯磺酸钠, 1,3-丙二醇, 相行为, 增溶特性

Abstract:

We mainly investigated the phase behavior of the AOT (sodium bis-(2-ethylhexyl) sulfosuccinate/CO2/ethanol/water quaternary system and the AOT/CO2/ethanol/1,3-propanediol (1,3-PDO)/water quinary system at 30-50 °C and at pressures of 6.9-10.3 MPa. AOT was used as the surfactant and ethanol was used as the cosolvent at 1,3-PDO concentrations of 2.5%, 5.0%, and 7.5%(w). This result shows that a thermodynamically stable microemulsion can be formed by controlling the operating pressures and temperatures. Subsequently, the selective extraction of 1,3-PDO from the aqueous solution can be controlled using appropriate temperatures and pressures, which is useful for the practical application of this technique in industry.

Key words: Supercritical CO2 microemulsion, Sodium bis-(2-ethylhexyl) sulfosuccinate, 1,3-Propanediol, Phase behavior, Solubilization

MSC2000: 

  • O642