IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: 1-Butanol with Hexane (n-hexane) and Water

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Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 1-Butanol (n-butanol, butyl alcohol, n-butyl alcohol); C4H10O; [71-36-3]  NIST Chemistry WebBook for detail
   (3) Hexane (n-hexane); C6H14; [110-54-3]  NIST Chemistry WebBook for detail

Original Measurements:
   Sugi, H.; Katayama, T., J. Chem. Eng. Jpn. 10, 400 (1977).

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 (compiler)	Mass Fraction w2 (compiler)	Mole Fraction x1	Mole Fraction x2
25.0	298.2	0.0000	0.99989	0.0000	0.99949
25.0	298.2	0.1109	0.8866	0.1255	0.8630
25.0	298.2	0.1650	0.8306	0.1839	0.7960
25.0	298.2	0.2134	0.7795	0.2337	0.7342
25.0	298.2	0.2766	0.7093	0.2928	0.6459
25.0	298.2	0.3470	0.6318	0.3548	0.5557
25.0	298.2	0.4339	0.5331	0.4220	0.4460
25.0	298.2	0.5148	0.4356	0.4709	0.3427
25.0	298.2	0.5763	0.3611	0.5035	0.2714
25.0	298.2	0.5894	0.3446	0.5091	0.2560
25.0	298.2	0.6765	0.2324	0.5407	0.1598
25.0	298.2	0.7460	0.1269	0.5413	0.0792
25.0	298.2	0.7835	0.0540	0.5229	0.0310
25.0	298.2	0.8065	0.0000	0.5032	0.0000
25.0	298.2	0.0593	0.0000	0.0151	0.0000

Compositions of coexisting phases

t/°C	T/K	Mass Fraction w1 (compiler)	Mass Fraction w2 (compiler)	Mole Fraction x1	Mole Fraction x2	Comment(s)
25.0	298.2	0.1368	0.8603	0.1540	0.8328	organic-rich phase
25.0	298.2	0.1921	0.8017	0.2118	0.7601	organic-rich phase
25.0	298.2	0.3464	0.6326	0.3547	0.5571	organic-rich phase
25.0	298.2	0.4330	0.5337	0.4207	0.4460	organic-rich phase
25.0	298.2	0.5544	0.3890	0.4942	0.2983	organic-rich phase
25.0	298.2	0.6414	0.2793	0.5311	0.1989	organic-rich phase
25.0	298.2	0.7578	0.1089	0.5413	0.0669	organic-rich phase
25.0	298.2	0.0266	0.0000	0.0066	0.0000	water-rich phase
25.0	298.2	0.0286	0.0000	0.0071	0.0000	water-rich phase
25.0	298.2	0.0321	0.0000	0.0080	0.0000	water-rich phase
25.0	298.2	0.0360	0.0000	0.0090	0.0000	water-rich phase
25.0	298.2	0.0407	0.0000	0.0102	0.0000	water-rich phase
25.0	298.2	0.0476	0.0000	0.0120	0.0000	water-rich phase
25.0	298.2	0.0510	0.0000	0.0129	0.0000	water-rich phase

Method/Apparatus/Procedure:
   A combination of titration and analytical method was used. The apparatus and experimental procedure were described in Ref. 1. For glc analysis a 1.6 m column filled with Poropak-Q was used. Solubility of water in hexane was determined by the Karl Fischer method. Composition of the water-rich phase was determined by the gross composition of phase split liquid mixture and composition of the organic phase (concentration of hexane was assumed to be 0).

Source and Purity of Materials:
   (1) Merck Uvasol, spectrograde; used as received; densities agreed within 0.0003 with literature values.
   (2) Merck Uvasol, spectrograde; used as received; densities agreed within 0.0003 with literature values.
   (3) De-ionized, twice distilled.

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

References:
   ¹ H. Sugi, T. Nitta, and T. Katayama, J. Chem. Eng. Jpn. 9, 12 (1976).

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