Add time:07/31/2019 Source:sciencedirect.com
Vapor–liquid equilibrium (VLE) data are reported for five binary systems involving propylene glycols. VLE data have been measured in the temperature range of 350.15–510.15 K and pressure up to 34.374 kPa for the binary systems: 1,2-propanediol (monopropylene glycol, MPG) + 2-[2-(2-hydroxypropoxy) propoxy]propan-1-ol (tripropylene glycol, TPG), MPG + 2-(2-[2-(2 hydroxypropoxy) propoxy]propoxy) propan-1-ol (tetrapropylene glycol, TePG), 1-(2-hydroxypropoxy) propan-2-ol (dipropylene glycol, DPG) + TPG, DPG + TePG and TPG + TePG. These experimental data are obtained using an equilibrium apparatus build in our laboratory. For the binary system MPG + DPG there are VLE data available in literature. The experimental data obtained were correlated using the NRTL model. These VLE data are essential for the process design in order to separate propylene glycols mixtures by distillation.
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