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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
2-Propanol with 2,2,4-Trimethylpentane (isooctane) and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) 2,2,4-Trimethylpentane (isooctane); C8H18; [540-84-1]
NIST Chemistry WebBook
for detail
(3) 2-Propanol (isopropanol, isopropyl alcohol); C3H8O; [67-63-0]
NIST Chemistry WebBook
for detail
Original Measurements:
Arda, N.; Sayar, A.A., Fluid Phase Equilib. 73, 129-38 (1992).
Variables:
Temperature = 293 K
Prepared By:
A. Skrzecz
Experimental Data:
(Notes on the Nomenclature)
Compositions along the saturation curve
t/°C
T/K
Mass Fraction w
1
Mass Fraction w
2
Mole Fraction x
1
(compiler)
Mole Fraction x
2
(compiler)
25.0
293.2
0.0000
0.0028
0.0000
0.0004
25.0
293.2
0.0145
0.0060
0.0044
0.0010
25.0
293.2
0.0406
0.0094
0.0126
0.0015
25.0
293.2
0.1152
0.0125
0.0380
0.0022
25.0
293.2
0.1582
0.0151
0.0541
0.0027
25.0
293.2
0.1907
0.0207
0.0673
0.0038
25.0
293.2
0.2593
0.0193
0.0969
0.0038
25.0
293.2
0.2811
0.0218
0.1074
0.0044
25.0
293.2
0.3292
0.0210
0.1313
0.0044
25.0
293.2
0.3874
0.0251
0.1641
0.0056
25.0
293.2
0.4380
0.0297
0.1965
0.0070
25.0
293.2
0.4632
0.0312
0.2138
0.0076
25.0
293.2
0.5086
0.0320
0.2471
0.0082
25.0
293.2
0.5684
0.0573
0.3077
0.0163
25.0
293.2
0.5893
0.0739
0.3364
0.0222
25.0
293.2
0.6173
0.1137
0.3921
0.0380
25.0
293.2
0.6208
0.1389
0.4151
0.0489
25.0
293.2
0.6156
0.1667
0.4306
0.0613
25.0
293.2
0.5930
0.2147
0.4401
0.0838
25.0
293.2
0.5744
0.2521
0.4467
0.1031
25.0
293.2
0.5351
0.3088
0.4392
0.1333
25.0
293.2
0.5104
0.3388
0.4283
0.1496
25.0
293.2
0.5067
0.3547
0.4385
0.1615
25.0
293.2
0.4612
0.4269
0.4355
0.2121
25.0
293.2
0.4096
0.4913
0.4102
0.2588
25.0
293.2
0.3616
0.5580
0.3916
0.3179
25.0
293.2
0.2650
0.6886
0.3389
0.4632
25.0
293.2
0.1933
0.7752
0.2737
0.5775
25.0
293.2
0.0585
0.9294
0.0995
0.8318
25.0
293.2
0.0274
0.9606
0.0478
0.8823
25.0
293.2
0.0000
0.9921
0.0000
0.9519
Compositions of coexisting phases
t/°C
T/K
Mass Fraction w
1
Mass Fraction w
2
Mole Fraction x
1
(compiler)
Mole Fraction x
2
(compiler)
Comment(s)
25.0
293.2
0.3126
0.6308
0.3752
0.3983
hydrocarbon-rich phase
25.0
293.2
0.2441
0.7134
0.3207
0.4931
hydrocarbon-rich phase
25.0
293.2
0.2018
0.7676
0.2851
0.5706
hydrocarbon-rich phase
25.0
293.2
0.1660
0.8145
0.2517
0.6497
hydrocarbon-rich phase
25.0
293.2
0.1352
0.8451
0.2094
0.6888
hydrocarbon-rich phase
25.0
293.2
0.1103
0.8726
0.1761
0.7329
hydrocarbon-rich phase
25.0
293.2
0.1061
0.8757
0.1691
0.7342
hydrocarbon-rich phase
25.0
293.2
0.0920
0.8909
0.1489
0.7587
hydrocarbon-rich phase
25.0
293.2
0.0704
0.9113
0.1152
0.7848
hydrocarbon-rich phase
25.0
293.2
0.0614
0.9224
0.1022
0.8078
hydrocarbon-rich phase
25.0
293.2
0.0394
0.9457
0.0672
0.8481
hydrocarbon-rich phase
25.0
293.2
0.0327
0.9531
0.0562
0.8623
hydrocarbon-rich phase
25.0
293.2
0.0216
0.9661
0.0378
0.8903
hydrocarbon-rich phase
25.0
293.2
0.0112
0.9770
0.0198
0.9104
hydrocarbon-rich phase
25.0
293.2
0.6051
0.0852
0.3595
0.0266
water-rich phase
25.0
293.2
0.5802
0.0594
0.3199
0.0172
water-rich phase
25.0
293.2
0.5320
0.0461
0.2709
0.0124
water-rich phase
25.0
293.2
0.4908
0.0319
0.2337
0.0080
water-rich phase
25.0
293.2
0.4535
0.0339
0.2079
0.0082
water-rich phase
25.0
293.2
0.3947
0.0251
0.1684
0.0056
water-rich phase
25.0
293.2
0.3613
0.0293
0.1499
0.0064
water-rich phase
25.0
293.2
0.3202
0.0288
0.1277
0.0060
water-rich phase
25.0
293.2
0.2607
0.0285
0.0985
0.0057
water-rich phase
25.0
293.2
0.2363
0.0207
0.0867
0.0040
water-rich phase
25.0
293.2
0.1521
0.0164
0.0518
0.0029
water-rich phase
25.0
293.2
0.1287
0.0162
0.0430
0.0029
water-rich phase
25.0
293.2
0.0859
0.0110
0.0277
0.0019
water-rich phase
25.0
293.2
0.0450
0.0022
0.0140
0.0004
water-rich phase
Method/Apparatus/Procedure:
Solubility measurements were made in an equilibrium cell with a stirrer
1
by titration of binary mixtures of known composition with the third component. This was done using 2-propanol for heterogeneous hydrocarbon-water mixtures, until the turbidity had disappeared and 2,2,4-trimethylpentane for homogeneous alcohol-water mixtures until cloudiness was observed. Tie lines were measured in the same cell filled with ternary heterogeneous mixtures of known composition. Mixtures were stirred for 1 h and after separation the samples of each phase were twice analyzed; 2-propanol concentration was determined by glc using Supelco Carbopack-C 0.2%, CW-1500, 60/80 column on Aerograph Hydrogen-Flame, Model 600-C (N
2
, 12-13 mL/s, 373 K). Water was determined by the Karl Fischer method.
Source and Purity of Materials:
(1) Merck; dried over anhydrous K
2
CO
3
, distilled, with middle 80% collected; impurities <0.1% by glc; b.p.=355.7 ±0.1 K, n(293 K,D)=1.3756±0.0005, p(293 K)=783.2 ±0.1 kg m
-3
.
(2) Merck; dried over anhydrous K
2
CO
3
, distilled, with middle 60% collected; impurities <0.2% by glc; b.p.=37 ±0.1 K, n(293 K,D)=1.3890±0.0005, p(293 K)=69 ± 0.1 kg m
-3
.
(3) Source not specified.
Estimated Errors:
Solubility: Not reported.
Temperature: Temp. ±0.1 K; solubility curve ±0.0025 mass fraction, analysis: 2-propanol ±0.0050 mass fraction, water ±0.0025 mass fraction.
References:
1
A. A. Sayar, J. Chem. Eng. Data 36, 61 (1991).