IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: Ethanol with 1-Octene and Water

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Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 1-Octene; C8H16; [111-66-0]  NIST Chemistry WebBook for detail
   (3) Ethanol (ethyl alcohol); C2H6O; [64-17-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Nowakowska, J.; Kretschmer, C.B.; Wiebe, R., J. Chem. Eng. Data Ser. 1, 42 (1956).

Variables:
   Temperature = 273 K - 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)
0.0	273.2	0.080	0.000	0.0329	0.0000
0.0	273.2	0.122	0.000	0.0515	0.0000
0.0	273.2	0.164	0.000	0.0712	0.0000
0.0	273.2	0.252	0.000	0.1164	0.0000
0.0	273.2	0.344	0.000	0.1702	0.0000
0.0	273.2	0.385	0.000	0.1967	0.0000
0.0	273.2	0.431	0.001	0.2288	0.0002
0.0	273.2	0.456	0.001	0.2472	0.0002
0.0	273.2	0.510	0.002	0.2900	0.0005
0.0	273.2	0.588	0.006	0.3610	0.0015
0.0	273.2	0.655	0.015	0.4352	0.0041
0.0	273.2	0.684	0.020	0.4720	0.0057
0.0	273.2	0.755	0.069	0.6121	0.0230
0.0	273.2	0.750	0.135	0.6821	0.0504
0.0	273.2	0.735	0.167	0.6972	0.0650
0.0	273.2	0.649	0.293	0.7073	0.1311
0.0	273.2	0.509	0.458	0.6514	0.2406
0.0	273.2	0.350	0.632	0.5339	0.3958
0.0	273.2	0.187	0.805	0.3476	0.6144
20.0	298.2	0.080	0.000	0.0329	0.0000
20.0	298.2	0.122	0.000	0.0515	0.0000
20.0	298.2	0.164	0.000	0.0712	0.0000
20.0	298.2	0.252	0.000	0.1164	0.0000
20.0	298.2	0.307	0.000	0.1477	0.0000
20.0	298.2	0.312	0.001	0.1508	0.0002
20.0	298.2	0.388	0.001	0.1989	0.0002
20.0	298.2	0.424	0.002	0.2240	0.0004
20.0	298.2	0.502	0.004	0.2841	0.0009
20.0	298.2	0.607	0.014	0.3837	0.0036
20.0	298.2	0.638	0.020	0.4195	0.0054
20.0	298.2	0.676	0.031	0.4701	0.0089
20.0	298.2	0.717	0.052	0.5395	0.0161
20.0	298.2	0.723	0.066	0.5606	0.0210
20.0	298.2	0.729	0.100	0.6038	0.0340
20.0	298.2	0.717	0.162	0.6560	0.0609
20.0	298.2	0.637	0.288	0.6726	0.1248
20.0	298.2	0.500	0.453	0.6202	0.2307
20.0	298.2	0.347	0.629	0.5205	0.3874
20.0	298.2	0.180	0.809	0.3332	0.6148

Compositions of coexisting phases

t/°C	T/K	Mass Fraction w1	Mass Fraction w2	Mole Fraction x1 (compiler)	Mole Fraction x2 (compiler)	Comment(s)
0.0	273.2	0.002	0.998	0.005	0.995	hydrocarbon-rich phase
0.0	273.2	0.005	0.995	0.012	0.998	hydrocarbon-rich phase
0.0	273.2	0.008	0.992	0.019	0.981	hydrocarbon-rich phase
0.0	273.2	0.018	0.982	0.043	0.957	hydrocarbon-rich phase
0.0	273.2	0.029	0.970	0.068	0.927	hydrocarbon-rich phase
0.0	273.2	0.059	0.939	0.131	0.857	hydrocarbon-rich phase
0.0	273.2	0.293	0.001	0.1396	0.0002	water-rich phase
0.0	273.2	0.437	0.002	0.2334	0.0004	water-rich phase
0.0	273.2	0.599	0.006	0.3717	0.0015	water-rich phase
0.0	273.2	0.690	0.022	0.4807	0.0063	water-rich phase
0.0	273.2	0.747	0.058	0.5884	0.0188	water-rich phase
0.0	273.2	0.729	0.177	0.6996	0.0697	water-rich phase
20.0	273.2	0.000	1.000	0.000	1.000	hydrocarbon-rich phase
20.0	273.2	0.004	0.995	0.010	0.984	hydrocarbon-rich phase
20.0	273.2	0.007	0.992	0.017	0.977	hydrocarbon-rich phase
20.0	273.2	0.014	0.984	0.033	0.955	hydrocarbon-rich phase
20.0	273.2	0.027	0.970	0.062	0.920	hydrocarbon-rich phase
20.0	273.2	0.047	0.949	0.105	0.872	hydrocarbon-rich phase
20.0	273.2	0.064	0.931	0.139	0.833	hydrocarbon-rich phase
20.0	273.2	0.110	0.881	0.222	0.731	hydrocarbon-rich phase
20.0	273.2	0.133	0.000	0.0566	0.0000	water-rich phase
20.0	273.2	0.278	0.000	0.1309	0.0000	water-rich phase
20.0	273.2	0.441	0.000	0.2358	0.0000	water-rich phase
20.0	273.2	0.523	0.005	0.3020	0.0012	water-rich phase
20.0	273.2	0.676	0.029	0.4687	0.0083	water-rich phase
20.0	273.2	0.731	0.080	0.5861	0.0263	water-rich phase
20.0	273.2	0.726	0.128	0.6303	0.0456	water-rich phase
20.0	298.2	0.679	0.229	0.6734	0.0932	water-rich phase

Method/Apparatus/Procedure:
   Points on the binodal curve were obtained by titrating a known mixture of two components by the third component until turbidity appeared or disappeared. The mixtures were prepared by volume with calibrated pipettes and the results converted to weight percent. Over most of the composition range alcohol-hydrocarbon mixtures were titrated with water. For 25°C, the end point was taken when the mixture remained homogeneous at 25°C, but become turbid at 24.8°C.  The titrations at 0°C were performed in small conical flasks with magnetic stirrers placed in Dewar vessel. Tie lines were determined through measurements of refractive index at 25°C of both phases in equilibrium and comparison with the values obtained on binodal curve. For solutions containing more than 40% ethanol the tie lines were obtained by measuring densities at 25°C in a similar procedure.  The experimental procedures were adapted mainly from Ref. 1.

Source and Purity of Materials:
   (1) Source not specified, commercial absolute grade; used as received; p(25°C)=785.97 kg m^-3, water concentration 0.30 mass % (water was taken into account in calculations of composition).
   (2) Phillips, pure grade purity >99 mole %; used as received; p(25°C)=710.78 kg m^-3.
   (3) Distilled.

Estimated Errors:
   Solubility: Not reported.
   Temperature: Conc. <0.1% (relative error) for ethanol in the region near 100% of hydrocarbon (tie lines).

References:
   ¹ E. R. Washburn, V. Hnizda, and R. Vold, J. Am. Chem. Soc. 53, 3237 (1931).

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