Miscibility considerations in the system propane‐hexatriacontane

Simultaneous prediction of the critical and sub-critical phase behavior in mixtures using equations of state IV. Mixtures of chained n-alkanes

“…The information presented on Fig. 10 contradicts the claim of Schwarz and Nieuwoudt (2003b) that the data of Chan Peters et al (1992) and Leder et al (1976) than with the data of Schwarz and Nieuwoudt (2003b). This is because while underestimating the experimental points of Schwarz and Nieuwoudt (2003b), GPDA slightly overestimates the data of Chan et al (2000).…”

“…The data regarding these systems have been reported by several studies (Aalto and Liukkonen, 1996;Peters et al, 1992;Schwarz and Nieuwoudt, 2003a,b;Leder et al, 1976;Chan et al, 2000), which sometimes exhibit signiÿcant mutual deviations. Fig.…”

“…Following the results of GPDA, one can conclude that the data of Leder et al (1976) are in good agreement with the reliable data of Peters et al (1992). However, it should be pointed out that Leder et al (1976) have not detected the small region of limited liquid-liquid immiscibility characteristic for the system, which exhibits phase behavior of Type V. It is remarkable to note that GPDA not only successfully predicts the topology of the phase behavior for this system, but yields also an exact estimation of the range of the liquid-liquid split. At the same time, GPDA underestimates both critical endpoints.…”

“…We conclude that the data from this reference is less reliable and the reasons behind this are the following: ÿrst, there is a signiÿcant scattering exhibited by these data. Second, GPDA yields an excellent prediction of the critical data of Leder et al (1976) for propane-n-hexatriacontane- Fig. 9.…”

Partial miscibility behavior of the ethane + propane + n-dotriacontane mixture

“…LLV immiscibility in propane + n -paraffin mixtures does not commence until at least carbon number 37 (13,14), presumably with a locus like that of methane + n -hexane or ethane + n-octadecane.…”