IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Methanol with Isoprene (2-methyl-1,3-butadiene, isopentadiene) and Water

Components:
   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 2-Methyl-1,3-butadiene (isoprene, isopentadiene); C5H8; [78-79-5]  NIST Chemistry WebBook for detail
   (3) Methanol (methyl alcohol); CH4O; [67-56-1]  NIST Chemistry WebBook for detail

Original Measurements:
   Lesteva, T.M.; Ogorodnikov, S.K., Morozova, V.I., Zh. Prikl. Khim. (Leningrad) 39, 2134-6 (1966).

Variables:
   Temperature = 288 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)
15.0	288.2	0.0000	0.0008	0.0000	0.0002
15.0	288.2	0.101	0.002	0.0595	0.0006
15.0	288.2	0.201	0.002	0.1241	0.0006
15.0	288.2	0.260	0.002	0.1652	0.0006
15.0	288.2	0.409	0.003	0.2809	0.0010
15.0	288.2	0.397	0.003	0.2709	0.0010
15.0	288.2	0.487	0.003	0.3490	0.0010
15.0	288.2	0.109	0.004	0.0646	0.0011
15.0	288.2	0.283	0.005	0.1824	0.0015
15.0	288.2	0.403	0.007	0.2768	0.0023
15.0	288.2	0.479	0.011	0.3443	0.0037
15.0	288.2	0.505	0.013	0.3690	0.0045
15.0	288.2	0.557	0.025	0.4245	0.0090
15.0	288.2	0.630	0.040	0.5098	0.0152
15.0	288.2	0.671	0.057	0.5679	0.0227
15.0	288.2	0.630	0.058	0.5197	0.0225
15.0	288.2	0.650	0.079	0.5560	0.0318
15.0	288.2	0.682	0.092	0.6050	0.0384
15.0	288.2	0.683	0.094	0.6077	0.0393
15.0	288.2	0.688	0.122	0.6351	0.0530
15.0	288.2	0.683	0.159	0.6575	0.0720
15.0	288.2	0.666	0.198	0.6653	0.0930
15.0	288.2	0.665	0.199	0.6647	0.0936
15.0	288.2	0.665	0.214	0.6780	0.1026
15.0	288.2	0.652	0.226	0.6685	0.1090
15.0	288.2	0.637	0.253	0.6694	0.1251
15.0	288.2	0.637	0.267	0.6825	0.1346
15.0	288.2	0.618	0.284	0.6675	0.1443
15.0	288.2	0.589	0.327	0.6602	0.1724
15.0	288.2	0.574	0.336	0.6434	0.1772
15.0	288.2	0.551	0.381	0.6473	0.2106
15.0	288.2	0.518	0.419	0.6263	0.2383
15.0	288.2	0.452	0.499	0.5841	0.3033
15.0	288.2	0.446	0.507	0.5807	0.3105
15.0	288.2	0.368	0.600	0.5204	0.3991
15.0	288.2	0.355	0.612	0.5060	0.4103
15.0	288.2	0.331	0.639	0.4833	0.4388
15.0	288.2	0.302	0.672	0.4546	0.4758
15.0	288.2	0.250	0.731	0.3983	0.5478
15.0	288.2	0.248	0.737	0.3991	0.5579
15.0	288.2	0.204	0.788	0.3464	0.6294
15.0	288.2	0.136	0.854	0.2448	0.7232
15.0	288.2	0.101	0.895	0.1909	0.7957
15.0	288.2	0.0000	0.9997	0.0000	0.9989

Compositions of coexisting phases
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mole Fraction x₁ (compiler)	Mole Fraction x₂ (compiler)	Comment(s)
15.0	288.2	0.000	0.999	0.0000	0.9962	hydrocarbon-rich phase
15.0	288.2	0.000	0.998	0.0000	0.9925	hydrocarbon-rich phase
15.0	288.2	0.000	0.997	0.0000	0.9888	hydrocarbon-rich phase
15.0	288.2	0.003	0.996	0.0063	0.9899	hydrocarbon-rich phase
15.0	288.2	0.003	0.995	0.0063	0.9862	hydrocarbon-rich phase
15.0	288.2	0.007	0.991	0.0147	0.9779	hydrocarbon-rich phase
15.0	288.2	0.020	0.977	0.0412	0.9478	hydrocarbon-rich phase
15.0	288.2	0.030	0.968	0.0614	0.9314	hydrocarbon-rich phase
15.0	288.2	0.142	0.853	0.2587	0.7252	hydrocarbon-rich phase
15.0	288.2	0.070	0.001	0.0406	0.0003	water-rich phase
15.0	288.2	0.152	0.002	0.0917	0.0006	water-rich phase
15.0	288.2	0.246	0.001	0.1551	0.0003	water-rich phase
15.0	288.2	0.280	0.001	0.1796	0.0003	water-rich phase
15.0	288.2	0.334	0.002	0.2203	0.0006	water-rich phase
15.0	288.2	0.600	0.022	0.4678	0.0081	water-rich phase
15.0	288.2	0.671	0.043	0.5592	0.0169	water-rich phase
15.0	288.2	0.685	0.065	0.5904	0.0264	water-rich phase
15.0	288.2	0.143	0.852 (a)	0.2587	0.7252	water-rich phase

Notes:
   ^a  Critical point of solution estimated by the authors.

Method/Apparatus/Procedure:
   The standard titration method was used to construct the binodal curve. Refractive indexes and densities of points on the binodal curve were measured. Ternary mixtures of known composition were shaken in the thermostat for 1 h. After separation, refractive indexes and densities of both phases were measured and concentrations were calculated from calibration curves prepared during solubility measurements. The results of the analysis of the water-rich phase were checked for a few points by redistillation and further analysis of distillate by glc and the Karl Fischer methods.

Source and Purity of Materials:
   (1) Source not specified, distilled several times on laboratory columns; purity 99.85%-99.90%.
   (2) Source not specified, distilled several times on laboratory columns; purity 99.85%-99.90%.
   (3) Not specified.

Estimated Errors:
   Solubility: Not reported.
   Temperature: Temp. ±0.1°C.