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Vapor Pressures and Thermophysical Properties of Ethylene Carbonate, Propylene Carbonate, γ-Valerolactone, and γ-Butyrolactone
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2017-11-16 00:00:00 , DOI: 10.1021/acs.jced.7b00578 Václav Pokorný 1 , Vojtěch Štejfa 1 , Michal Fulem 1 , Ctirad Červinka 1 , Květoslav Růžička 1
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2017-11-16 00:00:00 , DOI: 10.1021/acs.jced.7b00578 Václav Pokorný 1 , Vojtěch Štejfa 1 , Michal Fulem 1 , Ctirad Červinka 1 , Květoslav Růžička 1
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In this work, a thermodynamic study of four important industrial solvents, ethylene carbonate (CAS RN: 96-49-1), propylene carbonate (CAS RN: 108-32-7), γ-valerolactone (CAS RN: 108-29-2), and γ-butyrolactone (CAS RN: 96-48-0), is presented. The vapor pressure measurements were performed by static method using two apparatuses in a combined temperature interval (238–363) K. Heat capacities of condensed phases were measured by Tian–Calvet calorimetry in the temperature interval (262–358) K. The phase behavior of ethylene carbonate and γ-valerolactone was investigated by a heat-flux DSC from 183–303 and 328 K, respectively. Ideal-gas thermodynamic properties were calculated using the methods of statistical thermodynamics based on calculated fundamental vibrational frequencies and molecular structure data. A consistent thermodynamic description of all involved properties (calculated ideal-gas heat capacities and experimental data on vapor pressures, condensed phase heat capacities, and vaporization enthalpies) was achieved by their simultaneous correlation.
中文翻译：
碳酸亚乙酯，碳酸亚丙酯，γ-戊内酯和γ-丁内酯的蒸气压和热物理性质
在这项工作中，对四种重要的工业溶剂，碳酸亚乙酯（CAS RN：96-49-1），碳酸亚丙酯（CAS RN：108-32-7），γ-戊内酯（CAS RN：108-29- 2），以及γ-丁内酯（CAS RN：96-48-0）。蒸气压测量是通过静态方法使用两个设备在组合温度区间（238–363）K中进行的。冷凝相的热容量通过Tian-Calvet量热法在温度区间（262–358）K中进行了测量。相行为用热通量DSC在183-303和328 K范围内分别测定了碳酸亚乙酯和γ-戊内酯的含量。基于统计的基本动力学频率和分子结构数据，使用统计热力学方法计算理想气体的热力学性质。
更新日期：2017-11-17
中文翻译：
碳酸亚乙酯，碳酸亚丙酯，γ-戊内酯和γ-丁内酯的蒸气压和热物理性质
在这项工作中，对四种重要的工业溶剂，碳酸亚乙酯（CAS RN：96-49-1），碳酸亚丙酯（CAS RN：108-32-7），γ-戊内酯（CAS RN：108-29- 2），以及γ-丁内酯（CAS RN：96-48-0）。蒸气压测量是通过静态方法使用两个设备在组合温度区间（238–363）K中进行的。冷凝相的热容量通过Tian-Calvet量热法在温度区间（262–358）K中进行了测量。相行为用热通量DSC在183-303和328 K范围内分别测定了碳酸亚乙酯和γ-戊内酯的含量。基于统计的基本动力学频率和分子结构数据，使用统计热力学方法计算理想气体的热力学性质。
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