Evaluator
Glenn T. Hefter School of Mathematical and Physical Sciences, Murdoch UniversityEvaluation
Quantitative solubility data for the ethylcyclohexane (1) -water (2) system have been reported in the publications listed in Table 1.
The original data in both of these publications are compiled in the Data Sheets immediately following this Critical Evaluation. For convenience further discussion of this system is in two parts.
1. SOLUBILITY OF ETHYLCYCLOHEXANE (1) IN WATER (2)
This system almost certainly exhibits type III phase behavior (see introductory material at the beginning of this volume). The phase diagram is similar to that of ethylbenzene and water.
The solubility of ethylcyclohexane in water at elevated temperatures and system pressures along the three phase equilibrium line have been investigated by Guseva and Parnov (ref 1) and Heidman et al. (ref 2). Their results are summarized in Table 2 and plotted in Figure 1. The agreement is very poor. However, it may be noted (ref 1) that the values reported by Guseva and Parnov at higher temperatures approach those of cyclohexane, which is unreasonable. It may also be noted that the data of Guseva and Parnov often differ markedly from Recommended values in other systems. The data of Heidman et al. are thus considered Tentative.
Heidman et al. report a three phase critical end point at 561.4 ±0.6 K, 9.93 ±0.04 MPa and x1 = 3.35 x 10-3 (2.05 g(1)/100g s1n, Evaluator).
2. SOLUBILITY OF WATER (2) IN ETHYLCYCLOHEXANE (1)
As only the data of Heidman et al. (ref 2) are available on the solubility of water in ethylcyclohexane (Table 1) no Critical Evaluation of water is possible. The interested user is referred to the appropriate Data Sheet for the experimental values.
The original data in both of these publications are compiled in the Data Sheets immediately following this Critical Evaluation. For convenience further discussion of this system is in two parts.
1. SOLUBILITY OF ETHYLCYCLOHEXANE (1) IN WATER (2)
This system almost certainly exhibits type III phase behavior (see introductory material at the beginning of this volume). The phase diagram is similar to that of ethylbenzene and water.
The solubility of ethylcyclohexane in water at elevated temperatures and system pressures along the three phase equilibrium line have been investigated by Guseva and Parnov (ref 1) and Heidman et al. (ref 2). Their results are summarized in Table 2 and plotted in Figure 1. The agreement is very poor. However, it may be noted (ref 1) that the values reported by Guseva and Parnov at higher temperatures approach those of cyclohexane, which is unreasonable. It may also be noted that the data of Guseva and Parnov often differ markedly from Recommended values in other systems. The data of Heidman et al. are thus considered Tentative.
Heidman et al. report a three phase critical end point at 561.4 ±0.6 K, 9.93 ±0.04 MPa and x1 = 3.35 x 10-3 (2.05 g(1)/100g s1n, Evaluator).
2. SOLUBILITY OF WATER (2) IN ETHYLCYCLOHEXANE (1)
As only the data of Heidman et al. (ref 2) are available on the solubility of water in ethylcyclohexane (Table 1) no Critical Evaluation of water is possible. The interested user is referred to the appropriate Data Sheet for the experimental values.
Figure
Sources:
1
Guseva, A. N.; Parnov, E. I.; Vestn. Mosk. Univ. Khim. 1964, 19, 77-8.
2
Heidman, J. L.; Tsonopoulos, C.; Brady, C. J.; Wilson, G. M.; A. I. Ch. E. J. 1985, 31, 376-84.