IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: 2-Propanol with Heptane and Water

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Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 2-Propanol (isopropanol, isopropyl alcohol); C3H8O; [67-63-0]  NIST Chemistry WebBook for detail
   (3) Heptane (n-heptane); C7H16; [142-82-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Vorobeva, A.I.; Karapetyants, M., Kh., Zh. Fiz. Khim. 41, 1984-9 (1967).

Variables:
   Temperature = 298 K

Prepared By:
   A. Skrzecz

Experimental Data:   (Notes on the Nomenclature)
  

Compositions along the saturation curve

t/°C	T/K	Mass Fraction w1	Mass Fraction w2	Mole Fraction x1 (compiler)	Mole Fraction x2 (compiler)
25	298.2	0.000	0.999	0.0000	0.9945
25	298.2	0.160	0.830	0.2315	0.7202
25	298.2	0.219	0.760	0.2940	0.6119
25	298.2	0.345	0.604	0.3932	0.4129
25	298.2	0.405	0.524	0.4236	0.3287
25	298.2	0.475	0.425	0.4467	0.2397
25	298.2	0.546	0.322	0.4629	0.1637
25	298.2	0.584	0.255	0.4584	0.1200
25	298.2	0.619	0.148	0.4168	0.0598
25	298.2	0.620	0.136	0.4091	0.0538
25	298.2	0.604	0.080	0.3540	0.0281
25	298.2	0.569	0.050	0.3043	0.0160
25	298.2	0.514	0.027	0.2494	0.0079
25	298.2	0.410	0.008	0.1740	0.0020

Compositions of coexisting phases

t/°C	T/K	Mass Fraction w1	Mass Fraction w2	Mole Fraction x1 (compiler)	Mole Fraction x2 (compiler)	Comment(s)
25	298.2	0.064	0.933	0.101	0.883	hydrocarbon-rich phase
25	298.2	0.110	0.882	0.165	0.795	hydrocarbon-rich phase
25	298.2	0.148	0.842	0.216	0.736	hydrocarbon-rich phase
25	298.2	0.159	0.830	0.229	0.718	hydrocarbon-rich phase
25	298.2	0.200	0.784	0.276	0.650	hydrocarbon-rich phase
25	298.2	0.257	0.715	0.330	0.550	hydrocarbon-rich phase
25	298.2	0.310	0.650	0.372	0.468	hydrocarbon-rich phase
25	298.2	0.348	0.601	0.396	0.410	hydrocarbon-rich phase
25	298.2	0.382	0.557	0.415	0.363	hydrocarbon-rich phase
25	298.2	0.445	0.470	0.440	0.279	hydrocarbon-rich phase
25	298.2	0.310	0.004	0.119	0.001	water-rich phase
25	298.2	0.450	0.014	0.200	0.004	water-rich phase
25	298.2	0.533	0.034	0.267	0.010	water-rich phase
25	298.2	0.547	0.040	0.281	0.012	water-rich phase
25	298.2	0.612	0.104	0.377	0.038	water-rich phase
25	298.2	0.614	0.180	0.436	0.077	water-rich phase
25	298.2	0.585	0.255	0.460	0.120	water-rich phase
25	298.2	0.545	0.322	0.461	0.163	water-rich phase
25	298.2	0.509	0.379	0.459	0.205	water-rich phase
25	298.2	0.445	0.470 (a)	0.440	0.279	water-rich phase

Notes:
   ^a  Critical point obtained graphically by the authors.

Method/Apparatus/Procedure:
   The experimental methods were described in Ref. 1. Water impurities in alcohol were taken into account in the measurements. Critical point of liquid-liquid equilibrium was obtained graphically by the method reported in Ref. 2.

Source and Purity of Materials:
   (1) Source and method of preparation were reported in Ref. 1.
   (2) Source not specified; pure grade; distilled; water concentration was analyzed by the Karl Fischer method.
   (3) Doubly distilled.

Estimated Errors:
   Solubility: Not reported.
   Temperature: Not specified.

References:
   ¹ A. I. Vorobeva and M. Kh. Karapetyants, Zh. Fiz. Khim. 40, 3018 (1966).
   ² E. F. Zilberman, Zh. Fiz. Khim. 26, 1458 (1952).

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Last updated: February 18, 2015 (Created: August 17, 2007)