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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
2-Methyl-1-propanol with Benzene and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) 2-Methyl-1-propanol (isobutyl alcohol); C4H10O; [78-83-1]
NIST Chemistry WebBook
for detail
(3) Benzene; C6H6; [71-43-2]
NIST Chemistry WebBook
for detail
Evaluator:
A. Skrzecz, Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland (1997.05)
Critical Evaluation:
A survey of reported compositions along the saturation curve (sat), and compositions of coexisting phases in equilibrium (eq.) for the system 2-methyl-1-propanol-benzene-water is given in Table 66.
Saturation curve
The ternary system 2-methyl-1-propanol-benzene-water forms a miscibility gap of type 2. Two binary systems, benzene-water and 2-methyl-1-propanol-water, form miscibility gaps. These binary systems were compiled and critically evaluated in previously published SDS volumes, Refs. 3 and 4, respectively. These recommended values of mutual solubility at 298 K are
x
'
2
=0.9970,
x
"
2
=0.000 409 for benzene-water system, and
x
'
1
=0.548,
x
=0.021 for 2-methyl-1-propanol-water system. The tie lines and experimental points along the saturation curve reported by Alberty and Washburn
1
are consistent with one another. The reported mutual solubility of the 2-methyl-1-propanol-water system
x
'
1
=0.5425 and
x
"
1
=0.0208 are in good agreement with the recommended values. Data of Letcher
et al
.
2
were reported in graphical form only and therefore are not compiled. The maximum alcohol concentration on the binodal curve at 298 K,
x
1
=0.55,
1
is consistent with the results of Alberty and Washburn,
1
x
1
=0.558. The experimental tie lines at 298.2 K, Ref. 1, are presented in
Fig. 34
together with the experimental points along the saturation curve.
Experimental Data:
(Notes on the Nomenclature)
TABLE 66. Summary of experimental data for the system 2-methyl-propanol-benzene-water
Author
T/K
DataType
Reference
Alberty and Washburn, 1945
298
sat. (14), eq. (10)
1
Letcher
et al
., 1990
298
sat. (13), eq. (4)
2
View Figure 1 for this Evaluation
Notes:
Table 66
Number of experimental points in parentheses.
References: (Click a link to see its experimental data associated with the reference)
1
Alberty, R.A.; Washburn, E.R., J. Phys. Chem. 49, 4 (1945).
2 Letcher, T.M.; Sewry, J.; Radloff, S., S. Afr. J. Chem. 43, 56 (1990).
3 Shaw, D.G., ed., Solubility Data Series, Vol. 37, Hydrocarbons with Water and Seawater, Part I: Hydrocarbons C5 to C7 (Pergamon, New York, 1989).
4 Barton, A.F. M., ed., Solubility Data Series, Vol. 15, Alcohols with Water (Pergamon, New York 1984).