Solubility relationships for disperse dyes in supercritical carbon dioxide

Investigations on the solubilities of some disperse azo dyes in supercritical carbon dioxide

“…Similar results have been reported in the literature [15]. The ability to form either inter-or intra-molecular hydrogen bonds promotes mutual solute interactions and consequently, the solubilization in CO 2 is hindered [15]. We presume that the intermolecular hydrogen bonds are responsible for poor solubility of D 3 in SF-CO 2 .…”

“…The addition of one CH 2 -group to D 2 molecule, results in a significant solubility enhancement of D 2 in comparison with D 1 . Similar results have been reported in the literature [15]. The ability to form either inter-or intra-molecular hydrogen bonds promotes mutual solute interactions and consequently, the solubilization in CO 2 is hindered [15].…”

Robust modelling of solubility in supercritical carbon dioxide using Bayesian methods

“…It is likely that the hydrogen-bond donor descriptor was selected as the solutes may interact with one another or with carbon dioxide molecules. This formation of the inter-or intra-molecular hydrogen bonds was proposed by other studies, to influence the supercritical solubility [8,9,19,[27][28][29].…”

“…These descriptors correlate positively (carbon and chlorine [28] atoms) or negatively (electronegative and partially charged heteroatoms [28]) with hydrophobicity, a property described earlier as important for scCO 2 solubility. Additional atomic descriptors selected by the MLREM method were aromatic carbon atoms that are also likely to correlate positively with the hydrophobicity descriptor.…”

Solubility of disperse yellow 54 in supercritical carbon dioxide with or without cosolvent

“…The solubility data of dyestuffs in supercritical fluids are fundamentally important to development and design of supercritical dyeing processes. However, the available solubility data are not so plentiful in the literature [25,[31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49].…”