R. S. Alwi, K. Tamura
Sep 18, 2015
Citations
1
Influential Citations
27
Citations
Journal
Journal of Chemical & Engineering Data
Abstract
Solubilites of 1,4-diamino-2,3-dichloroanthraquinone (C.I. Disperse Violet 28) and 1,8-dihydroxy-4,5-dinitroanthraquinone in supercritical carbon dioxide (sc-CO2) were measured at the temperature of (323.15, 353.15 and 383.15) K and over pressure ranges (12.5 to 25.0) MPa by a flow-type apparatus. Mole fraction solubility of 1,4-diamino-2,3-dichloroanthraquinone (C.I. Disperse Violet 28) is found significantly higher than that of 1,8-dihydroxy-4,5-dinitroanthraquinone. It was found that 2,3-dichloro group addition onto 1,4-diaminoanthraquione leads to higher solubility of 1,4-diaminoanthraquinone and the addition of 8-hydroxy-5-nitro group on 1-hydroxy-4-nitroanthraquione causes lower solubility than that of 1-hydroxy-4-nitroanthraquinone. Three semiempirical density-based models, Mendez–Santiago–Teja, Sung–Shim, and Bartle et al., were used to correlate the experimental results. Moreover, the solubilities of anthraquinone derivatives were analyzed thermodynamically by the regular solution model with the ...