Solubility of an acid dye in supercritical carbon dioxide by ion-pairing with dodecyltrimethylammonium bromide

Ozcan A., Ozcan A. S.

FLUID PHASE EQUILIBRIA, vol.249, no.1-2, pp.1-5, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 249 Issue: 1-2
  • Publication Date: 2006
  • Doi Number: 10.1016/j.fluid.2006.08.014
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1-5
  • Keywords: solubility, supercritical CO2, modifier, ion-paifing, acid dye, DISPERSE DYES, ANTHRAQUINONE, DERIVATIVES, YELLOW-119, RED-153, BLUE-79, FIBER, CO2
  • Anadolu University Affiliated: Yes


In this study, solubility of Acid Red 57 (AR57), which is an anionic dye, in supercritical CO2 was investigated using an ion-pairing with dodecyltrimethylammonium (DTMA) bromide. The measurements of AR57 and AR57-DTMA in supercritical CO2 without/with methanol as a modifier solvent were carried out at temperatures from 45 to 100 degrees C and pressures from 250 to 325 bar. Although AR57 is insoluble in supercritical CO, even with methanol as a modifier solvent, AR57-DTMA can dissolve in methanol modified supercritical CO2. The hydrophobic. ion-pairing provides a possibility for the solubility of hydrophilic dye in supercritical CO2. The solubilities of AR57-DTMA were measured in methanol modified supercritical CO, and the results were correlated by using a semi-empirical equation. (c) 2006 Elsevier B.V. All rights reserved.