Stability boundaries of tetrahydrofuran plus water system

被引：95

作者：

Makino, T ^{[1
]}

Sugahara, T ^{[1
]}

Ohgaki, K ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Div Chem Engn, Toyonaka, Osaka 5608531, Japan

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2005年 / 50卷 / 06期

关键词：

D O I：

10.1021/je0502694

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Phase equilibria for the tetrahydrofuran + water system below atmospheric pressure were investigated in a temperature range from 272 K to 278 K. The three-phase (structure-II hydrate + aqueous solution + gas) equilibrium curve has a maximum temperature at 277.45 +/- 0.02 K and a pressure of 4.9 +/- 0.1 kPa. At this condition, the equilibrium tetrahydrofuran composition of aqueous solution is equal to the stoichiometric ratio of tetrahydrofuran hydrate (structure-II). The tetrahydrofuran hydrate does not coexist with the gas phase beyond 277.45 K. The four-phase (structure-II hydrate + aqueous solution + ice Ih + gas) equilibrium point exists at 272.06 +/- 0.02 K and 1.1 +/- 0.1 kPa, and the equilibrium tetrahydrofuran mole fraction of aqueous solution is 0.0106 +/- 0.0002.

引用

页码：2058 / 2060

页数：3

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