Methanol (1) + benzene (2) binary

(i) VLE type: minimum azeotropic mixture

(ii) Vapor pressures:

p1s=80.9*exp(para1*tclap**3+para2*tclap**2+para3*tclap) [bar]

para1=0.212768828771579

para2=-0.319352375891615

para3=8.23174708919747

tclap=1-1-/(T/512.6)

T: temperature [K]

p2s= 48.9*exp(para1*tclap**3+para2*tclap**2+para3*tclap) [bar]

para1=0.489662525497929

para2=0.181629447193235

para3=6.49827277766285

tclap=1-1/(T/562.3)

T: temperature [K]

(iii) y_1,azeo =aT**2+bT+c (0 deg C < T < 121 deg C)

a=-5.2209835

b=0.002462834

c=0.48346497

T: temperature [deg C]

The values, T and y_1,azeo, denote temperature and y1 value of azeotropic mixture where y1 is the composition of component 1 in the vapor phase.

Fig. 1

y_1,azeo vs. T for the methanol (1) + benzene (2) binary, (○) y_1,azeo determined from constant temperature VLE data, (●) y_1,azeo determined from constant pressure data, and (−) predicted using the PPM.