Solid−Liquid Phase Equilibria of Binary and Ternary Mixtures for 2,6-Dimethylnaphthalene and 2,7-Dimethylnaphthalene with Ethanol or Methanol

Abstract

Experimental data of the solid−liquid equilibrium in the binary systems 2,6-dimethylnaphthalene (2,6-DMN) + 2,7-dimethylnaphthalene (2,7-DMN), 2,7-DMN + methanol, and 2,7-DMN + ethanol and solubility data in the ternary systems 2,6-DMN + 2,7-DMN + methanol and 2,6-DMN + 2,7-DMN + ethanol are presented.

Solid−Liquid Equilibria of Binary Mixtures of Dimethylnaphthalene Isomers

“…The experimental melting and eutectic temperatures for the 2,6-DMN + DMN isomers and the DMN + MN mixtures were measured. The accuracy for experimental data of SLE was previously confirmed for the 2,6-DMN + 2,7-DMN system . The experimental results are given in Tables and and shown in Figures , , and 3.…”

“…The accuracy for experimental data of SLE was previously confirmed for the 2,6-DMN + 2,7-DMN system. 16 The experimental results are given in Tables 2 and 3 and shown in Figures 1, 2, and 3. For interpolation purposes, the liquidus lines were correlated with the empirical equation of Ott and Goates 17 where x 1 / and T* are the mole fraction of DMN and the soliddisappearance temperature of the congruently melting compound or the pure substance, respectively.…”

“…The mixtures were prepared by mass using a Mettler AG 204 balance with an accuracy of ± 0.0001 g. The estimated accuracy in the mass fraction is less than ± 2·10 -4 . SLE temperatures were determined using a polythermal method described in detail previously. − The equilibrium cell, a cylindrical glass vessel (50 mm inside diameter, 120 mm long), was placed, by a ground-glass joint, in a triple-jacketed vessel. The outer jacket was evacuated, and either heated or cooled medium from a thermostated bath could be circulated through the middle jacket.…”

“…SLE temperatures were determined using a polythermal method described in detail previously. [10][11][12][13][14][15][16] The equilibrium cell, a cylindrical glass vessel (50 mm inside diameter, 120 mm long), was placed, by a ground-glass joint, in a triple-jacketed vessel. The outer jacket was evacuated, and either heated or cooled medium from a thermostated bath could be circulated through the middle jacket.…”

Solid–Liquid Phase Equilibrium and Solubility of Dibenzo[b,d]furan and 9H-Fluoren-9-one in Organic Solvents

“…The solubility data can also be used to evaluate the activity coefficient of dibenzo[ b , d ]furan and 9 H -fluoren-9-one in the solution. In the case of no solid–solid transition occurring in the experimental temperature range, the solid–liquid equilibrium of binary systems can be calculated using a simplified thermodynamic relation reported by Cheon et al − ln nobreak0em.25em⁡ x i = prefix− normalΔ normalf normalu normals H i R T ( 1 − T T f u s , i ) where γ i , Δ fus H i , and T fus, i denote the activity coefficient, the molar enthalpy of fusion, and the melting temperature of pure component i , respectively.…”