Does propylene glycol boil with water?
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Some people say it is azeotropic while others say it is not; let’s discuss it! Give some advice!
I believe that propanone and water cannot form an azeotrope. Looking at the structure of propanone, it is difficult for it to form intermolecular hydrogen bonds with water. However, propanone has another structure in the enol form, which allows it to form intermolecular hydrogen bonds with water on the surface. But the conversion between propanone and acrolein is extremely minimal. Therefore, I think propanone does not form an azeotrope with water
Checking the solvent manual, water is not among the solvents that can form binary azeotropes with propanol
It is azeotropic-free; you can check it in the manual.
Propane does not form an azeotrope with water; propane is the homolog with the lowest molecular weight； Methanol also does not form an azeotrope with water; it is the alcohol with the lowest molecular weight.
Well, indeed a few sources suggest that an azeotrope exists, but most sources still consider it non-azeotropic. However, it is extremely difficult to achieve a purity of over 99%, and from this perspective, it exhibits characteristics of an azeotrope
There is no azeotrope at normal and reduced pressure, but one exists at high pressure. At 85 psi(a), the water content in the azeotrope is 3 wt%.
Based solely on the apparent XY diagram, no azeotrope seems to exist, but there is a dead zone in the high-propanol region, which means that an infinite number of plates are required. In industry, slightly negative pressure is generally used, which affects the vapor-liquid equilibrium and causes it to cross the pinch point.