No abstract

To develop and design the supercritical fluid dyeing (SFD) process a lot of basic dye solubility data and modeling of these solubility data are necessary. The solubility of six blue dispersed dyes, C.I. Disperse Blue 134, CI. Disperse Blue 79, C.I. Disperse Blue 79:1, C.I. Disperse Blue 3, C.I. Disperse Blue 60 and C.I. Disperse Blue 14 in supercritical carbon dioxide have been correlated with two equation of state. All critical properties have been estimated with a group contribution method (GCM). Solubility data for these dyes has never been correlated using an equation of state (EOS). Therefore, it is worthwhile to model the solubility of these dyes with EOSs. In this work, the aim is correlating reported data with a new EOS and comparing obtained results with the results of Peng-Robinson EOS (PR-EOS) together with two adjustable parameter van der Waals mixing and combining rules. The calculated results showed that new EOS is more accurate than PR-EOS. It can be employed to speed up the process of SCF applications in industry.

No abstract

The solubility of three disperse azo dyes, 4-(N,N-dimethylamino)-4'-itroazobenzene (D 1 ), 4-(N,N-diethylamino)-4'-nitroazobenzene (D 2 ) and Parared (D 3 ) in supercritical carbon dioxide have been correlated with two equations of state. All critical properties have been estimated with a group contribution method (GCM). As far we know, solubility data for these dyes have never been correlated using an equation of state (EOS). Therefore, it is worthwhile to model the solubility of these disperse Azo dyes. In this work, the aim is correlating reported data with a new (M-factor) EOS and comparing obtained results with the results of Peng-Robinson EOS (PR-EOS) together with two adjustable parameter van der Waals mixing and combining rules. The calculated results showed that Mfactor EOS is more accurate than PR-EOS. It can be employed to speed up the process of supercritical fluid (SCF) applications in industry.