Solubility of Disperse Dyes Blue 56, Violet 1 and Yellow 54 in Supercritical Carbon Dioxide With or Without Cosolvent

• Main Authors: TSAI, CHENG-CHOU, 蔡政舟
• Other Authors: Lin, Ho-Mu
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/27469052052254013348

碩士 === 國立臺灣科技大學 === 化學工程系 === 92 === This study contains three major parts: (1) measurement of relative dissolution rate of three anthraquinone derivatives dispersion dyestuffs (Blue 56, Violet 1, and Yellow 54) in supercritical CO2 at 393.15 K and 30 MPa; (2) measurement of the saturated solubilities of these three disperse dyes in supercritical CO2 at temperatures from 353.15 K to 393.15 K and pressures from 15 MPa to 30 MPa; (3) investigation of cosolvent effects on the saturated solubility of these three dyes. All the experiments were conducted with a semi-flow type solid-gas equilibrium apparatus. The experimental results showed that the magnitudes of dissolution rate follow the order of Yellow 54 > Violet 1 > Blue 56 under the same operating conditions. The saturated solubilities of the disperse dyestuffs were also found to follow the same order of Yellow 54 > Violet 1 > Blue 56. Adding ethanol as a cosolvent was capable of substantially increasing the saturated solubilities in the supercritical CO2 for these dyestuffs. The solubility data can be correlated with the Chrastil model and the Santiago-Teja model reasonably well, and successfully passed the consistency test with the Santiago-Teja model.