PHASE EQUILIBRIUM RELATIONSHIPS IN THE BINARY SYSTEM METHYL ETHYL KETONE–WATER
1960; NRC Research Press; Volume: 38; Issue: 10 Linguagem: Inglês
10.1139/v60-271
ISSN1480-3291
Autores Tópico(s)nanoparticles nucleation surface interactions
ResumoA complete investigation of the phase equilibrium relationships in the binary system of the partially miscible liquid pair methyl ethyl ketone–water is presented. The system shows a minimum azeotrope at 73.35 ± 0.05 °C with a composition of 88.45 ± 0.15 wt.% ketone. The azeotrope falls outside of the miscibility gap for this system. The liquid–vapor curves intersect the miscibility gap at the temperature of 73.60 ± 0.05 °C at which two conjugate solutions of compositions 18.10 ± 0.10 and 87.78 ± 0.15 wt.% ketone, respectively, are in equilibrium with a vapor phase of composition 88.00 ± 0.15 wt.% ketone. The partially miscible liquid pair shows an upper consolute temperature of 139 ± 0.5 °C at a composition of 44.9 ± 0.2 wt.% ketone. The liquid–liquid curves intersect the solid–liquid curves at a temperature of −6.0 ± 0.5° C at which two conjugate solutions of composition 40.0 ± 0.2 and 78.0 ± 0.2 wt.% ketone, respectively, are in equilibrium with ice. A binary eutectic exists at a temperature of −89.0 ± 0.5 °C with composition of the eutectic solid equal to 99.4 ± 0.4 wt.% ketone. The freezing point of pure, dry methyl ethyl ketone is determined to be −83.5 ± 0.5 °C.
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