The measurement for the solid solubility of Octyl Gallate, Isoamyl Gallate antioxidants in Supercritical Carbon Dioxide

• Main Authors: Chang, Chiahao, 張嘉豪
• Other Authors: Wang, Tzuchi
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/32154711448095677470

碩士 === 中國文化大學 === 化學工程與材料工程學系奈米材料碩士班 === 101 === Supercritical fluid can be applied to many aspects, for example extraction technology, clean technology, atomization, fiber dyeing technology etc. This experiment used supercritical fluid extraction, to provide isolation and purification This study using semi-mobile type apparatus to measure the solubility of the two antioxidants in supercritical carbon dioxide, these two antioxidants are Octyl Gallate and Isoamyl Gallate, the experimental data were taken at 308.15 K, 313.15 K and 318.15 K, and the pressure between the ranges from 12 MPa to 24 MPa. Then using an ultraviolet visible spectrophotometer (UV-visible) analysis the data. Experimental results show that Octyl Gallate solubility mole fraction in the range between 10-5 to 10-6 mole%, and Isoamyl Gallate solubility mole fraction in the range between 10-6 mole%. The study while taking advantage of the two semi-empirical formula Mendez-Santiago and Teja Model (MST Model) and Chrastil Model to Octyl Gallate and isoamyl Gallate solubility data regression, and use the average absolute relative deviation (AARD) to analyze the reasonableness of the experimental data, the results showed that two antioxidants were less than 7%.