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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
2-Butanol with Benzene and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) 2-Butanol (sec-butanol, sec-butyl alcohol, (RS)-2-butanol, dl-2-butanol, DL-2-butanol); C4H10O; [78-92-2]
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-butanol-benzene-water is given in Table 78.
Saturation curve
The ternary system 2-butanol-benzene-water forms a miscibility gap of type 2. Two binary systems, benzene-water and 2-butanol-water, form miscibility gaps. These systems were compiled and critically evaluated in previously published SDS volumes, Refs. 3 and 4, respectively. These recommended values of mutual solubility at 303 K are
x
'
2
=0.996 40,
x
"
2
=0.000 418 for the benzene-water system, and
x
'
1
=0.318,
x
"
1
=0.0491 for the 2-butanol-water system. Both types of data reported by Davis and Evans
1
are consistent with one another at a binodal curve. The 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
=0.50, Ref. 2, is consistent with the results of Davis and Evans at 303 K,
1
x
1
=0.499. The experimental tie lines at 303.2 K
1
are shown in
Fig. 42
together with the experimental points along the saturation curve.
Experimental Data:
(Notes on the Nomenclature)
TABLE 78. Summary of experimental data for the system 2-butanol-benzene-water
Author
T/K
DataType
Reference
Davis and Evans, 1960
303
sat. (17), eq. (10)
1
Letcher
et al
., 1990
298
sat. (13), eq. (4)
2
View Figure 1 for this Evaluation
Notes:
Table 78
Number of experimental points in parentheses.
References: (Click a link to see its experimental data associated with the reference)
1
Varteressian, K.A.; Fenske, M.R., Ind. Eng. Chem. 28, 928 (1936).
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).