| Vapor Pressures of Di-n-Butyl Phthalate and Di-iso-ButylHexahydrophthalate at Reduced Pressures |
| |
| 作者姓名： | 齐欣 徐立勇 高正红 刘志华 |
| |
| 作者单位： | SchoolofSciences,TianjinUniversity,Tianjin300072,China |
| |
| 摘 要： | In this paper the measured values of the vapor pressures by ebulliometer method of two important maleic anhydride recovery solvents, di-n-butyl phthalate (DBP) and di-iso-butyl hexahydrophthalate (DIBE),between 0. 63-17. 79 kPa and 0. 49-30. 95 kPa,are reported respectively. A comparison of the data of DBP with the published data has been made, which shows good consistency. For the convenient use of these vapor pressures, Cragoe equation, Antoine equation and Kirchhoff equation are selected to correlate them. The correlating results show that Antoine equation is the best one of the three equations to fit for the vapor pressures of the two solvents. According to Clausius-Clapeyron equation, the linear relationship between natural logarithm of pressure and reciprocal of temperature is used to calculate the molar latent heats of evaporation of the two organic solvents. The molar latent heats of evaporation of DBP and DIBE are 75.1 kJ/mol and 67.7 kJ/mol, respectively.
|
| 关 键 词： | 蒸汽压力 磷酸二正丁酯 DBP DIBE 相关性 测量 分子潜伏热 |
Vapor Pressures of Di-n-Butyl Phthalate and Di-iso-Butyl Hexahydrophthalate at Reduced Pressures |
| |
| QI Xin,XU Li-yong,GAO Zheng-hong,LIU Zhi-hua.Vapor Pressures of Di-n-Butyl Phthalate and Di-iso-ButylHexahydrophthalate at Reduced Pressures[J].Transactions of Tianjin University,2004,10(3):229-232. |
| |
| Authors: | QI Xin XU Li-yong GAO Zheng-hong LIU Zhi-hua |
| |
| Abstract: | In this paper the measured values of the vapor pressures by ebulliometer method of two important maleic anhydride recovery solvents, di-n-butyl phthalate (DBP) and di-iso-butyl hexahydrophthalate (DIBE), between 0.63-17.79 kPa and 0.49-30.95 kPa,are reported respectively.A comparison of the data of DBP with the published data has been made, which shows good consistency. For the convenient use of these vapor pressures, Cragoe equation, Antoine equation and Kirchhoff equation are selected to correlate them. The correlating results show that Antoine equation is the best one of the three equations to fit for the vapor pressures of the two solvents. According to Clausius-Clapeyron equation, the linear relationship between natural logarithm of pressure and reciprocal of temperature is used to calculate the molar latent heats of evaporation of the two organic solvents. The molar latent heats of evaporation of DBP and DIBE are 75.1 kJ/mol and 67.7 kJ/mol, respectively. |
| |
| Keywords: | vapor pressure measurement di-n-butyl phthalate (DBP) di-iso-butyl hexahydrophthalate (DIBE) correlation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
