Effect of Cosolvents on Solute Solubility in and Separability Between Liquid Phases in Liquid-liquid vapor Equilibrium Systems

液-液蒸气平衡体系中助溶剂对液相中溶质溶解度和相间分离性的影响

• 批准号: 9730853
• 负责人: Kraemer Luks
• 金额: $ 19.03万
• 依托单位: University of Tulsa
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-02-01 至 2001-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9730853&HistoricalAwards=false
• 关键词: Effect; Cosolvents; Solute; Solubility; Separability

ABSTRACT CTS-9730853 K. Luks/U. of Tulsa Support is sought for the experimental study of liquid-liquid-vapor (llg) equilibria of selected ternary mixtures of common gas solvents + solutes + cosolvents. This research will contribute to the understanding of how cosolvents may enhance the capacity of the gas-solvent-rich liquid phase (l2) for extracting solutes from a solute-rich liquid phase (11) in an llg subcritical system. Detailed studies of the llg regions of several ternary mixtures will be carried out to evaluate the roles that cosolvent polarity and phase concentration may have in enhancing the molar concentration of a variety of relatively non-volatile liquid solutes in the gas-solvents-rich liquid l2. It is proposed that the llg phase equilibria be studies for nine ternary mixtures composed of gas solvent + solute + cosolvent, six containing the gas solvent carbon dioxide and three containing the gas solvent ethane. The solute will be selected from species of distinctly different molecular structure (n-tetradecane, l-methylbenzene, l- decanol), species that have heretofore exhibited llg partial miscibility with these gas solvents. The cosolvent will be selected according to it polarity (methanol or acetone, species that has attracted previous interest with respect to enhancing gas-phase solubility in prototype supercritical extraction systems). The studies will be performed in the temperature range of 250 to 325 K at pressure to 90 bars (9 Mpa) in existing visual cell apparatuses especially designed for and dedicated to the study of multiphase equilibria phenomena. Subcritical llg extraction systems offer a dense (i.e., liquid) gas-solvent phase at modest temperatures and pressures. The data resulting from this study will be of value for suggesting possible new ways to separate at benign conditions certain molecular types of species from complex mixtures that occur in environmental, manufacturing, and refining applications. Additionally, these studies will further expand our understanding of multiphase equilibrium phenomena in general by adding to the limited existing experimental database of llg systems.

摘要CTS-9730853 K. Luks/U.关于塔尔萨 寻求支持的实验研究液-液-气（llg）平衡的选定的三元混合物的常见气体溶剂+溶质+助溶剂。 本研究将有助于了解在llg亚临界系统中，助溶剂如何提高富气-溶剂液相（l2）从富溶质液相（11）中萃取溶质的能力。 将对几种三元混合物的llg区域进行详细研究，以评估助溶剂极性和相浓度在提高富含气体溶剂的液体l2中各种相对不挥发的液体溶质的摩尔浓度方面可能具有的作用。 本文提出了对九种由气体溶剂+溶质+助溶剂组成的三元混合物，六种含气体溶剂二氧化碳和三种含气体溶剂乙烷的llg相平衡进行研究。 溶质将选自具有明显不同分子结构的物质（正十四烷、1-甲苯、1-癸醇）、迄今为止与这些气体溶剂表现出11 g部分相容性的物质。 共溶剂将根据其极性（甲醇或丙酮，在原型超临界萃取系统中关于提高气相溶解度已经引起先前兴趣的物质）来选择。 这些研究将在250至325 K的温度范围内，在90巴（9 Mpa）的压力下，在专门设计用于研究多相平衡现象的现有视觉细胞装置中进行。 亚临界LLG萃取系统提供了致密的（即，液体）气相-溶剂相。 从这项研究中得到的数据将是有价值的建议可能的新方法，在良性条件下分离某些分子类型的物种从复杂的混合物中发生的环境，制造和精炼应用。 此外，这些研究将进一步扩大我们对多相平衡现象的理解，一般通过添加到有限的现有实验数据库llg系统。