IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: Methanol with Xylene (mixture of isomers) and Water

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Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) Methanol (methyl alcohol); CH4O; [67-56-1]  NIST Chemistry WebBook for detail
   (3) Xylene (mixture of isomers); C8H10; [1330-20-7]  NIST Chemistry WebBook for detail

Original Measurements:
   Hartley, J., J. Soc. Chem. Ind. (London) 69, 60-1 (1950).

Variables:
   Temperature = 293 K - 323 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
20	293.2	0.185	0.808	0.419	0.553
20	293.2	0.465	0.507	0.696	0.229
20	293.2	0.666	0.264	0.765	0.092
20	293.2	0.711	0.194	0.758	0.062
20	293.2	0.735	0.130	0.725	0.039
20	293.2	0.736	0.100	0.696	0.029
20	293.2	0.706	0.050	0.611	0.013
20	293.2	0.492	0.010	0.356	0.002
30	303.2	0.185	0.806	0.416	0.548
30	303.2	0.462	0.505	0.686	0.226
30	303.2	0.660	0.260	0.749	0.089
30	303.2	0.703	0.192	0.742	0.061
30	303.2	0.721	0.128	0.701	0.038
30	303.2	0.726	0.099	0.680	0.028
30	303.2	0.703	0.054	0.611	0.014
30	303.2	0.491	0.012	0.356	0.003
50	323.2	0.092	0.900	0.243	0.719
50	323.2	0.184	0.805	0.412	0.544
50	323.2	0.545	0.396	0.708	0.155
50	323.2	0.622	0.292	0.721	0.102
50	323.2	0.675	0.205	0.710	0.065
50	323.2	0.705	0.121	0.671	0.035
50	323.2	0.660	0.036	0.545	0.009
50	323.2	0.556	0.009	0.419	0.002

Compositions of coexisting phases

t/°C	T/K	Mass Fraction w1	Mass Fraction w2	Mole Fraction x1 (compiler)	Mole Fraction x2 (compiler)	Comment(s)
20	293.2	0.033	0.965	0.101	0.888	hydrocarbon-rich phase
20	293.2	0.721	0.057	0.636	0.015	water-rich phase
30	303.2	0.035	0.963	0.106	0.883	hydrocarbon-rich phase
30	303.2	0.715	0.068	0.638	0.018	water-rich phase
50	323.2	0.050	0.946	0.146	0.833	hydrocarbon-rich phase
50	323.2	0.702	0.088	0.637	0.024	water-rich phase

Concentration of xylene and water in coexisting phases

t/°C	T/K	Mass Fraction w1	Comment(s)
20	293.2	0.983	hydrocarbon-rich phase
20	293.2	0.982	hydrocarbon-rich phase
20	293.2	0.977	hydrocarbon-rich phase
20	293.2	0.965	hydrocarbon-rich phase
20	293.2	0.517	water-rich phase
20	293.2	0.353	water-rich phase
20	293.2	0.254	water-rich phase
20	293.2	0.222	water-rich phase
30	303.2	0.985	hydrocarbon-rich phase
30	303.2	0.977	hydrocarbon-rich phase
30	303.2	0.970	hydrocarbon-rich phase
30	303.2	0.963	hydrocarbon-rich phase
30	303.2	0.525	water-rich phase
30	303.2	0.351	water-rich phase
30	303.2	0.256	water-rich phase
30	303.2	0.217	water-rich phase

Method/Apparatus/Procedure:
   The titration method was used. Binary mixtures of known volumes were titrated with the third component in glass-stoppered bottles until, after vigorously shaking, the mixture became turbid. The equilibrium phases were determined by titrating with water binary methanol-xylene mixtures. The xylene-rich phase was at the beginning the lower layer, but addition of water caused this phase to separate as the  upper layer. To determine tie immersed in a thermostat bath, shaken, and after separation one component of each phase was analyzed by the Karl Fischer reagent and xylene, in the hydrocarbon-rich phase, was determined by extraction with water. The results were presented on a Gibbs triangle together with binodal curve.

Source and Purity of Materials:
   (1) BDH, sulpher free; distilled; fraction boiling at the range 140-2 °C was used.
   (2) Source not specified; absolute alcohol; used as received.
   (3) Distilled

Estimated Errors:
   Solubility: Not reported.
   Temperature: Temp. ±0.5°C (temperature of the bath).

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