Compilation - 2-Methyl-2-propanol with 2,2,4-Trimethylpentane (isooctane) and Water (IUPAC SDS Volume 69)

SDS Volume (3775)

Volume 69. Ternary Alcohol-Hydrocarbon-Water Systems, p None

Original Measurements

Dubovskaya, A. S.; Karapetyants, M. Kh.; Tr. Inst. -Mosk.; Khim. -Tekhnol. Inst. Im. D. I. Mendeleeva 58, 92 (1968).

Variables:

Room Temp: 298 - 303 $\pu{K}$

Prepared by:

A. Skrzecz

Method/Apparatus/Procedure:

The titration method was used to determine the solubility curve. Binary hydrocarbon-alcohol mixtures were titrated with water until turbidity was observed, as described in [4]. The titration was repeated several times to eliminate errors. The relationship of density versus composition of saturated mixture was used later to calculate equilibrium. The method was tested on the ethanol-heptane-water system and the results were in agreement with literature data. The analytical method was used to determine liquid-liquid equilibria. A binary mixture of known composition was placed in a special thermostated vessel and the third component was added to obtain a two-phase mixture. This mixture was agitated for 3-4 h to ensure equilibrium. The mixture was allowed to stand 1-2 h to become clear and then both phases were taken for density measurements. On the basis the previously constructed relationship of density versus composition of the saturated mixture, the composition of the mixture in equilibrium was calculated. Concentrations of 2,2,4-trimethylpentane in the water rich phase were reported in the paper for several experimental points as <0.0010 of mass fraction while the sums of water and alcohol concentrations were equal to 1.000.0 Recalculations to mole fraction were made treating them as real values.

Source and Purity of Materials:
  1. Source not specified; $d_{20}^{20}$ = 0.7894, $n_{D}^{25}$ = 1.3860, MP = 25°C; used as received.
  2. Source not specified; $d_{20}^{20}$ = 0.6890, $n_{D}^{25}$ = 1.3890.
  3. Doubly distilled.
Estimated Errors:

Ambient temperature: Temp. ±0.1 K; conc. ±0.0001.
Mass concentration (m/v) (1): Not reported.

References

1 Alekseev, V. F.; Gornyi Zh. 2, 385 (1885).
2 Izmajlov, N. A.; Franke, A. K.; Zh. Fiz. Khim. 29, 120 (1955).
3 Zilberman,E. N.; Zh. Fiz. Khim. 26, 1458 (1952).
4 Bancroft, W. D.; Phys. Rev. 3, 21 (1896).

Components:
  1. 2-Methyl-2-propanol, $\ce{ C4H10O }$; [75-65-0] NIST WebBook
  2. 2,2,4-Trimethylpentane, $\ce{ C8H18 }$; [540-84-1] NIST WebBook
  3. Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data

The authors calculated critical points: (a) by Alekseev's, Ref. 1, (b) by Izmailov's, Ref. 2, and (c) by Zilberman's, Ref. 3, methods, respectively.

Compositions along the saturation curve
$T$ (°C) $T$ ($\pu{K}$) w1 w2 $x_{1}$ $x_{2}$
0.0273.2 0.15150.8370 0.20420.7320
0.0273.2 0.08110.9050 0.11180.8094
0.0273.2 0.09250.8897 0.12450.7770
0.0273.2 0.32800.6340 0.36620.4593
0.0273.2 0.38100.5760 0.40890.4012
0.0273.2 0.44200.4973 0.43570.3181
0.0273.2 0.49000.4145 0.42540.2335
0.0273.2 0.49500.4083 0.42750.2288
0.0273.2 0.57600.2550 0.40090.1152
0.0273.2 0.57900.2500 0.40080.1123
0.0273.2 0.58800.2270 0.39290.0984
0.0273.2 0.59200.1650 0.34850.0630
0.0273.2 0.59300.1520 0.34060.0567
0.0273.2 0.59250.1315 0.32670.0471
0.0273.2 0.57800.1350 0.31300.0474
0.0273.2 0.52250.0605 0.22940.0172
0.0273.2 0.51000.0525 0.21760.0145
0.0273.2 0.45200.0240 0.17235.9 x 10-3
20.0293.2 0.15150.8370 0.20420.7320
20.0293.2 0.08110.9050 0.11180.8094
20.0293.2 0.09250.8897 0.12450.7770
20.0293.2 0.32800.6340 0.36620.4593
20.0293.2 0.38100.5760 0.40890.4012
20.0293.2 0.49000.4145 0.42540.2335
20.0293.2 0.49500.4083 0.42750.2288
20.0293.2 0.55200.3290 0.43980.1701
20.0293.2 0.54500.3310 0.42910.1691
20.0293.2 0.56800.2940 0.42820.1438
20.0293.2 0.59500.2225 0.39930.0969
20.0293.2 0.59600.1360 0.33350.0494
20.0293.2 0.59100.1330 0.32600.0476
20.0293.2 0.58500.1270 0.31580.0445
20.0293.2 0.55400.0960 0.26940.0303
20.0293.2 0.50440.0531 0.21380.0146
20.0293.2 0.49800.0500 0.20840.0136
20.0293.2 0.45020.0298 0.17267.4 x 10-3
20.0293.2 0.36880.0202 0.12744.5 x 10-3
30.0303.2 0.08400.9006 0.11480.7986
30.0303.2 0.11450.8670 0.15200.7469
30.0303.2 0.21550.7650 0.27210.6267
30.0303.2 0.12060.8580 0.15760.7274
30.0303.2 0.40500.5425 0.41620.3618
30.0303.2 0.48000.4400 0.43850.2608
30.0303.2 0.55500.3260 0.44180.1684
30.0303.2 0.60150.2290 0.41550.1027
30.0303.2 0.59900.2300 0.41260.1028
30.0303.2 0.60550.1395 0.34700.0519
30.0303.2 0.60300.1380 0.34300.0509
30.0303.2 0.60800.1385 0.34920.0516
30.0303.2 0.56300.0980 0.27850.0315
30.0303.2 0.51850.0685 0.22920.0196
30.0303.2 0.50850.0515 0.21620.0142
30.0303.2 0.49900.0535 0.21010.0146
30.0303.2 0.45500.0300 0.17547.5 x 10-3
30.0303.2 0.41400.0195 0.15014.6 x 10-3
30.0303.2 0.41000.0178 0.14774.2 x 10-3
30.0303.2 0.40700.0190 0.14634.4 x 10-3
30.0303.2 0.39160.0144 0.13763.3 x 10-3
30.0303.2 0.35267.4 x 10-3 0.11791.6 x 10-3
30.0303.2 0.31601.9 x 10-3 0.10124 x 10-4
30.0303.2 0.28500.0000 0.08830.0000

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