Vapor-liquid equilibria of binary mixtures containing methyl tert-butyl ether (MTBE) and/or substitution hydrocarbons at 298.15 K and 313.15 K

Phase Equilibrium Properties of Binary and Ternary Mixtures Containing Dibutyl Ether, Cyclohexane, and Heptane or 1-Hexene at T = 313.15 K

“…The purity of the products after degassing was checked by gas chromatography, and the values were > 99.8 % (GC) for all the compounds. , and whose performance has been described detailed in previous papers 10,11 .…”

Excess thermodynamic properties of binary and ternary mixtures containing methyl 1,1-dimethylethyl ether (MTBE), -heptane, and methanol at= 313.15 K

“…(12)(13)(14) The data reduction of the binary and ternary mixtures has been performed using Barker's method (15) according to well-established procedures. (16,17) A developed computer program described elsewhere (1) has been used to implement the technique.…”

“…The experimental data for {x 1 (27) and the excess molar entropy S E m is calculated from the thermodynamic relation (28)(29)(30) We have not been able to make measurements in this region of the (vapour + liquid + liquid) equilibrium because the technique is not adequate for very low mole fractions. The pressure surface, figure 4, shows a maximum at 66.238 kPa which corresponds to the azeotrope {x 1 CH 3 OC(CH 3 ) 2 CH 3 + (1 − x 1 )CH 3 OH}, and a minimum at 12.331 kPa corresponding to the pressure of pure n-heptane.…”

“…The technique, developed by Van Ness and coworkers, (9,10) has been successfully implemented by one of the present authors, (11) and is described elsewhere. (1) A diagram of the apparatus is shown in figure 1.…”

“…This work is part of a research program on the thermodynamic characterization of ternary mixtures containing oxygenated additives (ethers and alcohols), and different types of hydrocarbons (paraffins, cycloparaffins, aromatics, oleffins). In previous studies, (1)(2)(3)(4)(5)(6)(7) we have investigated binary and ternary systems containing MTBE and/or the hydrocarbons benzene, cyclohexane, n-heptane, and 1-hexene at T = 313.15 K. Here, (MTBE + nheptane + methanol), and the binary (MTBE + methanol) and (methanol + n-heptane) at T = 313.15 K form the object of the present work.…”