Yu Su , Qingxin Zheng , Yoshiki Suga , Masaru Watanabe
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引用次数: 0
Abstract
Here, the solubility of terephthalic acid (TPA) in water was measured under hydrothermal conditions at temperatures from 423.15 K to 623.15 K by a semi-dynamic gravimetric system. The whole process, using water as the only solvent, was considered safe and environmentally friendly. The results indicated that the TPA solubility in water increased exponentially with the temperature. Particularly, at 573.15 K (10 MPa) and 623.15 K (20 MPa), the water solubility of TPA was measured to be 108.1 and 347.4 g kg−1, respectively. It was the first time to measure the TPA solubility in water at over 523.15 K experimentally. Fitted curves for the TPA solubility in water as functions of temperature and water density were plotted, and the thermodynamic properties for the dissolution of TPA into water were obtained and plotted. The TPA solubility results obtained would be helpful to improve the production or recycling of TPA under hydrothermal conditions.
期刊介绍：
The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics.
Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.
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