IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitromethane with Hexane and Castor oil methyl esters

Components:
   (1) Castor oil methyl esters; ; []  NIST Chemistry WebBook for detail
   (2) Nitromethane; CH3NO2 ; [75-52-5]  NIST Chemistry WebBook for detail
   (3) Hexane; C6H14; [110-54-3]  NIST Chemistry WebBook for detail

Original Measurements:
   Lakshmanan, C. M. and Laddha, G. S.; J. Am. Oil Chem. Soc. 37, 466-8 (1960).

Variables:
   Temperature = 303 K

Prepared By:
   V. P. Sazonov

Experimental Remarks:

   Estimated plait point: w₁ = 0.649, w₂ = 0.109, and w₃ = 0.242.

Experimental Data:   (Notes on the Nomenclature)

Table 1. Mutual solubility of nitromethane, hexane and castor oil methyl esters*
t/°C	T/K	Mass Fraction w₁	Mass Fraction w₂	Mass Fraction w₃
30.0	303.2	0.057	0.943	0.000
30.0	303.2	0.061	0.850	0.089
30.0	303.2	0.080	0.769	0.151
30.0	303.2	0.108	0.691	0.201
30.0	303.2	0.136	0.620	0.244
30.0	303.2	0.170	0.533	0.297
30.0	303.2	0.211	0.457	0.332
30.0	303.2	0.273	0.353	0.374
30.0	303.2	0.358	0.260	0.382
30.0	303.2	0.422	0.211	0.367
30.0	303.2	0.518	0.156	0.326
30.0	303.2	0.755	0.073	0.172
30.0	303.2	0.833	0.064	0.103
30.0	303.2	0.939	0.061	0.000

Table 2. Equilibrium tie lines data for the ternary system
t/°C	T/K	Mass Fraction w₃	Comment(s)
30.0	303.2	0.0368	(1)-rich phase (OH value of esters = 192.1)
30.0	303.2	0.0572	(1)-rich phase (OHV = 184.0)
30.0	303.2	0.0605	(1)-rich phase (OHV = 190.0)
30.0	303.2	0.0679	(1)-rich phase (OHV = 195.9)
30.0	303.2	0.0786	(1)-rich phase (OHV = 182.7)
30.0	303.2	0.0831	(1)-rich phase (OHV = 187.9 )
30.0	303.2	0.0821	(1)-rich phase (OHV = 191.3)
30.0	303.2	0.0975	(1)-rich phase (OHV = 180.4)
30.0	303.2	0.1064	(1)-rich phase (OHV = 182.4)
30.0	303.2	0.1077	(1)-rich phase (OHV = 184.8)
30.0	303.2	0.1227	(1)-rich phase (OHV = 175.3)
30.0	303.2	0.1314	(1)-rich phase (OHV = 194.3)
30.0	303.2	0.1411	(1)-rich phase (OHV = 180.5)
30.0	303.2	0.1901	(1)-rich phase (OHV = 173.3)
30.0	303.2	0.0753	(2)-rich phase (OHV = 142.8)
30.0	303.2	0.1588	(2)-rich phase (OHV = 134.2)
30.0	303.2	0.1565	(2)-rich phase (OHV = 149.7)
30.0	303.2	0.1520	(2)-rich phase (OHV = 157.4)
30.0	303.2	0.2818	(2)-rich phase (OHV = 141.5)
30.0	303.2	0.2795	(2)-rich phase (OHV = 154.6)
30.0	303.2	0.2766	(2)-rich phase (OHV = 159.7)
30.0	303.2	0.3684	(2)-rich phase (OHV = 149.9)
30.0	303.2	0.3656	(2)-rich phase (OHV = 157.2)
30.0	303.2	0.3616	(2)-rich phase (OHV = 162.5)
30.0	303.2	0.3905	(2)-rich phase (OHV = 156.4)
30.0	303.2	0.3841	(2)-rich phase (OHV = 159.3)
30.0	303.2	0.3794	(2)-rich phase (OHV = 164.1)
30.0	303.2	0.3635	(2)-rich phase (OHV = 160.4)

Notes:
   Table 1  ^*  This table was prepared by the compiler from the published curve of ternary system solubility.

Method/Apparatus/Procedure:
   The method of Treybal¹ was used. For determining the phase distribution data, known mixtures of ternary constituents comprising of (1), (2) and (3) well within the heterogeneous region were placed in a constant temperature bath after vigorous agitation and allowed to separate into two phases after attaining equilibrium. The two phases were separated and weighed. A weighed quantity of each phase was taken in a distilling flask, and water bath. Traces of (1) and (2) remaining were removed under vacuum by drying the esters on a water bath to constant weight under a stream of carbon dioxide. Total weight of the esters thus obtained was checked against the weight of ester taken originally in the mixture.

Source and Purity of Materials:
   (1) Fluka AG; distilled; b. p. = (100.5 to 101.5) °C, n(30 °C, D) = 1.3770, d(30 °C, 4 °C) = 1.1237.
   (2) BDH Ltd.; laboratory reagent-grade; distilled; b. p. = (67 to 70) °C, n(30 °C, D) = 1.3761, d(30 °C, 4 °C) = 0.6782.
   (3) Prepared by methylation of castor oil; using HCl as catalyst; dried and distilled.

Estimated Errors:

   Temperature: control to ± 0.1 K.

References:
   ¹R. E. Treybal, Liquid Extraction, McGraw-Hill, New York, 1951.