Solubilities of disperse dyes of blue 79:1,red 82 and modified yellow 119 in supercritical carbon dioxide and nitrous oxide

摘要

Dissolution of disperse blue 79:1,red 82,and modified yellow 119 with supercritical carbon dioxide and nitrous oxide was studied at 393.2 K and 30 MPa over a wide range of contact times.Equilibrium solubilities of the dyestuffs in the supercritical fluids were also measured at temperatures from 353.2 to 393.2 K and pressures up to 30 MPa.The solubilities were enhanced generally about 100-fold as pressure increasing from 15 to 30 MPa.Under the same equilibrium condition,the solubilities of the dyes in carbon dioxide followed the order of red 82 > blue 79:1 > modified yellow 119,and modified yellow 119 is more soluble in nitrous oxide than in carbon dioxide.The solubility data were correlated with the Chrastil,the Sung-Shim,and the Mendez-Santiago-Teja models.The Chrastil model correlated the solubility data to about within the experimental uncertainty.The correlated results of the Mendez-Santiago-Teja model endorsed the consistency of the solubility data over the entire experimental conditions.