| 硫酸铯/聚乙二醇双水相体系在298.15K的相平衡 |
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| 引用本文： | 张晓蕾,胡满成,翟全国,刘志宏,夏树屏,高世扬. 硫酸铯/聚乙二醇双水相体系在298.15K的相平衡[J]. 化学研究与应用, 2004, 16(4): 507-509 |
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| 作者姓名： | 张晓蕾 胡满成 翟全国 刘志宏 夏树屏 高世扬 |
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| 作者单位： | 陕西师范大学化学与材料科学学院,陕西,西安,710062;中国科学院盐湖研究所西安二部,陕西,西安,710043;陕西师范大学化学与材料科学学院,陕西,西安,710062;中国科学院盐湖研究所西安二部,陕西,西安,710043 |
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| 基金项目： | 国家自然科学基金(20171032)资助项目 |
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| 摘 要： | 水溶性高聚物的双水相体系可用于纯化一些无机盐，获得高纯晶体。由于高聚物的存在会减小盐在溶液中的溶解度，从而可能析出晶体。本文采用自制的相平衡装置，测定了硫酸铯／聚乙二醇(PEG1000，4000，10000)双水相体系在298．15K时的等温平衡溶解度。
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| 关 键 词： | 硫酸铯 聚乙二醇 双水相体系 相平衡 |
| 文章编号： | 1004-1656(2004)04-0507-03 |
| 修稿时间： | 2003-07-14 |
Phase diagram of the PEG (poly(ethylene glycol))-Cs2SO4-H2O aqueous two-phase system at 298.15 K |
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| ZHANG Xiao-lei,HU Man-cheng. Phase diagram of the PEG (poly(ethylene glycol))-Cs2SO4-H2O aqueous two-phase system at 298.15 K[J]. Chemical Research and Application, 2004, 16(4): 507-509 |
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| Authors: | ZHANG Xiao-lei HU Man-cheng |
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| Affiliation: | ZHANG Xiao-lei~1,HU Man-cheng~ |
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| Abstract: | Liquid-liquid equilibrium of the poly (ethylene glycol)(PEG)-Cs_2SO_4-H_2O aqueous two-phase system,with PEG of molecular weigth 1000,4000 and 10000,was measured at 298.15 K.The binodal curves were obtained using a four-parameter equation,and the tie lines were satisfactorily described using the Othmer-Tobias and Bancroft equations.These equations were used to develop a mathematical model for interpretation of the equilibrium data of these aqueous two-phase systems(ATPS).It was found that an increase in the molecular weight of the PEG produced a displacement of the binodal curve toward the origin and decreased the-phase zone. |
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| Keywords: | Cs_2SO_4 poly(ethylene glycol) aqueous two-phase system phase equilibrium |
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