partial miscibility

Partial miscibility describes the phenomenon where two liquids can mix to a certain extent but not in all proportions. The degree of miscibility often depends on temperature. For instance, n-butyl alcohol and water are completely miscible above 127°C, but below this temperature, they exhibit a miscibility gap, meaning they form two distinct liquid phases. Conversely, some systems, like water and triethylamine, are completely miscible below a certain temperature and only partially miscible above it. Phase diagrams are graphical representations that illustrate these conditions, showing the phases present at different temperatures and pressures.12