Critical properties of eight binary systems and two ternary systems were determined.
All binary systems with propanol show non-ideal behavior in the Tc–x1 curve.
Non-ideal behavior of binary systems with 1-propanol and 2-propanol were analyzed.
Experimental data of binary systems were fitted well with Redlich–Kister equations.
Critical surfaces of ternary systems were plotted using the Cibulka's expressions.