SDS Volume (4543)

Volume 72. Nitromethane with Water or Organic Solvents: Ternary and Quaternary Systems, p None

Original Measurements

Sazonov, V. P.; Chernysheva, M. F.; Zh. Fiz. Khim. 49, 2463 (1975).
Sazonov, V. P.; Chernysheva, M. F.; Zh. Obshch. Khim. 46, 997-1000 (1976).

Variables:

Room Temp: 293 - 439 $\pu{K}$

Prepared by:

N.V. Sazonov, V.P. Sazonov

Method/Apparatus/Procedure:

The synthetic method was used. Ampoules containing mixtures were suspended from a vertical roller linked to a shaking machine, which switched on at definite time intervals. Water bath temperature was controlled with a proportional temperature regulator and checked with mercury thermometers. Close to aphase transition, heating or cooling was effected at 0.03 °/h. Solubility temperature of the liquid phase was determined both with heating and cooling, and the average taken. The thermostat contained silicone oil above 80 °C.

Source and Purity of Materials:
  1. Source not specified; pure grade reagent; dried and repeatedly distilled in a packed glass column; no impurities detectable by gas chromatography.
  2. Source not specified; pure grade reagent; dried and repeatedly distilled at vacuum; 99.5 mole% purity.
  3. Twice distilled.
Estimated Errors:

Ambient temperature: taking ±0.01 K (293 K to 323 K); ±0.05 K (323 K to 373 K) and ±0.2 K (above 373 K).

Components:
  1. Nitromethane, $\ce{ CH3NO2 }$; [75-52-5] NIST WebBook
  2. 1-Nonanol, $\ce{ C9H20O }$; [143-08-8] NIST WebBook
  3. Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data

The temperatures of phase transitions were determined in ternary mixtures with a constant mass relationship of (1) and (2), respectively, 20.0:80.0, 40.0:60.0, 55.0:45.0, 70.0:30.0, and 85.0:15.0. L1 nitromethane-rich phase; L2 alcohol-rich phase; L3 water-rich phase. The phase which is being dissolved is indicated in the table.

Table 1. Solubility temperatures of three liquid phases
$T$ (°C) $T$ ($\pu{K}$) w1 w2 $x_{1}$ $x_{2}$
20.30293.45 0.19160.7664 0.29110.4927
23.71296.86 0.12000.4800 0.07150.1210
30.00303.15 0.19010.7606 0.28000.4740
30.02303.17 0.14980.5992 0.11950.2023
33.10306.25 0.18000.7200 0.21860.3700
33.60306.75 0.18650.7460 0.25520.4319
33.65306.80 0.18830.7534 0.26720.4525
33.71306.86 0.18870.7546 0.26950.4561
24.60297.75 0.38580.5786 0.51360.3259
30.06303.21 0.38320.5749 0.49870.3166
34.85308.00 0.38090.5713 0.48550.3081
38.16311.31 0.16040.2406 0.07000.0444
41.04314.19 0.37850.5677 0.47260.2999
42.53315.68 0.24080.3612 0.13830.0877
43.50316.65 0.30040.4506 0.22510.1429
43.90317.05 0.35960.5394 0.38670.2454
43.90317.05 0.37240.5587 0.44220.2807
43.90317.05 0.37600.5640 0.45970.2918
22.82295.97 0.53060.4341 0.63630.2203
24.78377.93 0.11110.0909 0.03890.0135
33.32306.47 0.52710.4312 0.61950.2145
39.51312.66 0.52370.4284 0.60390.2090
44.06317.21 0.52050.4258 0.58980.2041
44.44317.5 0.22060.1805 0.09490.0328
44.97318.12 0.33060.2705 0.18400.0637
44.98318.13 0.41250.3375 0.29420.1018
44.98318.13 0.49500.4050 0.49250.1705
44.98318.13 0.51220.4190 0.55520.1922
44.98318.13 0.51520.4216 0.56760.1965
22.50295.65 0.67960.2913 0.75390.1367
30.13303.28 0.67520.2894 0.73590.1334
37.60310.75 0.67010.2872 0.71570.1298
42.25315.40 0.14420.0618 0.05049.1 x 10-3
42.59315.74 0.66550.2852 0.69820.1266
44.50317.65 0.66210.2837 0.68560.1243
44.50317.65 0.65860.2823 0.67320.1221
44.51317.66 0.62930.2697 0.57970.1051
44.66317.81 0.52500.2250 0.35790.0649
44.76317.91 0.42070.1803 0.22760.0413
44.93318.08 0.28000.1200 0.11850.0215
32.43305.58 0.81990.1447 0.81900.0612
37.60310.75 0.81470.1438 0.80180.0599
38.23311.38 0.81220.1433 0.79350.0592
38.23311.38 0.80580.1422 0.77330.0577
38.41311.56 0.77310.1364 0.67970.0508
38.98312.13 0.65110.1149 0.43630.0326
40.92314.07 0.51250.0905 0.27040.0202
41.01314.16 0.33920.0598 0.14130.0105
44.94315.09 0.17680.0312 0.06154.6 x 10-3

(a) Critical opalescence.

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