Solubilities of C.I. Disperse Orange 25 and C.I. Disperse Blue 354 in Supercritical Carbon Dioxide

Abstract

Solubilities of C.I. Disperse Orange 25 (3-[N-ethyl-4-(4-nitrophenylazo)phenylamino]propionitrile) and C.I. Disperse Blue 354 ([2-[[4-(dihexylamino)-2-methylphenyl]methylene]-1,1-dioxidobenzo[b]thien-3(2H)-ylidene]propanedinitrile) in supercritical carbon dioxide were measured by a flow-type apparatus. The solubility measurements were carried out at the temperature range from (323.15 to 383.15) K and the pressures from (10.0 to 30.0) MPa. The solubility of the dyes was examined in terms of pressure, temperature, and the density of supercritical carbon dioxide. An empirical equation was used to correlate the experimental solubilities of the dyes in terms of the density of carbon dioxide. Furthermore, the experimental data were represented successfully using a modified form of the PRSV (Peng−Robinson−Stryjek−Vera) EOS (equation of state), where vapor pressures and molar volumes of the dyes were calculated simultaneously.

Representing dyestuff solubility in supercritical carbon dioxide with several density-based correlations

“…To use supercritical dyeing in the textile process, it is imperative to in detail investigate a wide variety of disperse dyes in supercritical CO 2 over wide ranges of temperatures and pressures. To date, there are rather a number of studies on dyestuff solubility behavior [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. A briefing of dyestuff solubility in supercritical CO 2 has been kindly updated by Lin et al [18,24].…”

Phase Behavior at High Pressure of the Ternary System: CO2, Ionic Liquid and Disperse Dye

“…According to van der Kraan et al [2], in dyeing of textiles consisting of nonpolar materials such as polyester, supercritical CO 2 acts as a blowing agent and increases the rate of diffusion of the dye molecules inside the fiber. Several studies have been reported on this textile-dyeing technology [3][4][5][6]. The literature describes applications of supercritical technology in combination with the ionic liquids in both the extraction and the separation processes and as an alternative solvent for organic and inorganic compounds in reaction mediums [7][8][9].…”

“…In this context, the objective of this work is to report new experimental data of CO 2 (1) + 1-butyl-3-methylimidazolium hexafluorophosphate [ 6 ] is one of the most studied ionic liquids (ILs) in the literature with great availability of physical and chemical data as well as phase equilibrium data [12][13][14]. Keskin et al [7], Huddleston et al [15], and Jaitely et al [16] have reported that the ionic liquid consisting of imidazole as a cation and [PF 6 ] − as an anion presents hydrophobic characteristics 6 ] absorbs the moisture during the synthesis process due to its hygroscopic property [17].…”

“…Keskin et al [7], Huddleston et al [15], and Jaitely et al [16] have reported that the ionic liquid consisting of imidazole as a cation and [PF 6 ] − as an anion presents hydrophobic characteristics 6 ] absorbs the moisture during the synthesis process due to its hygroscopic property [17]. A small amount of water in the ionic liquid can have a dramatic effect on the phase equilibrium behavior [13].…”

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

“…Tabata et al [3] investigated the solubility measurements of disperse dyes in supercritical CO 2 and the rate of dyeing and the equilibrium dye adsorption and a possible dyeing mechanism. Lee et al [10] and Shinoda and Tamura [11] researched the solubilities of two disperse dyes at various temperatures and pressures, using a flow-type equilibrium cell. Karami et al [12] 0378-3812/$ -see front matter © 2006 Elsevier B.V. All rights reserved.…”