2
0
2011
sai
nor
0
journal
Original
Saien, J.[Javad]
Norouzi, M.[Mahdi]
J. Chem. Eng. Data
2011
2020-09-29
Salting-Out Effect of NaCl and KCl on the Liquid Liquid Equilibrium of Water + 2-Methylpropanoic Acid + (1-Methylethyl)-benzene System at Several Temperatures
The salting-out effect of NaCl and KCl on the liquid liquid equilibrium (LLE) of the ternary system of {water (1) + 2-methylpropanoic acid (2) + (1-methylethyl)-benzene (3)}, a recommended system for liquid liquid extraction investigations, was studied at temperatures of (288.15, 298.15, and 313.15) K. The generated data for salt-free system have been used to estimate the binary molecular interaction parameters for the nonrandom two-liquid (NRTL) activity coefficient model. Results show that this model reproduces very good tie lines by estimated binary molecular interaction coefficients. The distribution coefficient of 2-methylpropanoic acid between organic/aqueous phases increases with its concentration, both in salt-free and in the presence of salt cases; however, it decreases moderately with temperature, within the range used. Adding a 0.05 mass fraction (based on mass of initial water) NaCl leads to an average enhancement of about 4 4% in distribution coefficient, and hence, it reaches to about 124 % by adding 0.10 mass fraction of this salt. The appropriate enhancement achievement with KCl are about (38 and 121) %, respectively. The Othmer Tobias equation was used to examine the reliability of the experimental results, and an excellent agreement was revealed.
10.1021/je200083a
6
56
2892-2898
1
InChI=1S/C9H12/c1-8(2)9-6-4-3-5-7-9/h3-8H,1-2H3
RWGFKTVRMDUZSP-UHFFFAOYSA-N
isopropylbenzene
1-methylethylbenzene
cumene
iso-propylbenzene
C9H12
1
Commercial source
1
99.5
3
Stated by supplier
2
InChI=1S/C4H8O2/c1-3(2)4(5)6/h3H,1-2H3,(H,5,6)
KQNPFQTWMSNSAP-UHFFFAOYSA-N
2-methylpropanoic acid
.alpha.-methylpropionic acid
2-methylpropionic acid
acetic acid, dimethyl-
isobutyric acid
propanoic acid, 2-methyl-
C4H8O2
1
Commercial source
1
99.5
3
Stated by supplier
3
InChI=1S/H2O/h1H2
XLYOFNOQVPJJNP-UHFFFAOYSA-N
water
H2O
1
Commercial source
1
Fractional distillation
2
99.9
3
Estimated by the compiler
1
2
1
1
1
3
1
Principal objective of the work
RDC
XXX
6/20/2011
1
Mass fraction
Titration method
1
Liquid mixture 2
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
2
Mass fraction
Titration method
1
Liquid mixture 1
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
3
Mass fraction
Titration method
2
Liquid mixture 1
Direct value, X
1
Data file compiler
Propagation of evaluated standard uncertainties
95
Liquid mixture 2
Liquid mixture 1
1
Pressure, kPa
Liquid mixture 2
101.3
4
1
Temperature, K
Liquid mixture 1
2
Mass fraction
2
Liquid mixture 2
1
288.2
4
2
0.0211
3
1
0.0034
2
1
0.001
2
0.9408
4
1
0.0022
3
0.0574
3
1
288.2
4
2
0.04
3
1
0.0022
2
1
0.001
2
0.8547
4
1
0.0046
3
0.1429
4
1
288.2
4
2
0.0563
3
1
0.002
2
1
0.001
2
0.7515
4
1
0.0078
3
0.2452
4
1
288.2
4
2
0.0644
3
1
0.0023
2
1
0.001
2
0.6909
4
1
0.0096
3
0.3045
4
1
288.2
4
2
0.0728
3
1
0.0035
2
1
0.001
2
0.6257
4
1
0.0116
3
0.3688
4
1
288.2
4
2
0.0819
3
1
0.0014
2
1
0.001
2
0.5597
4
1
0.0137
3
0.4339
4
1
288.2
4
2
0.0881
3
1
0.0039
2
1
0.001
2
0.5041
4
1
0.0154
3
0.4861
4
1
288.2
4
2
0.0938
3
1
0.0036
2
1
0.001
2
0.4564
4
1
0.0142
3
0.5292
4
1
298.2
4
2
0.0218
3
1
0.002
2
1
0.001
2
0.9469
4
1
0.0021
3
0.0518
3
1
298.2
4
2
0.0311
3
1
0.0025
2
1
0.001
2
0.899
4
1
0.0033
3
0.0982
3
1
298.2
4
2
0.0407
3
1
0.0024
2
1
0.001
2
0.8499
4
1
0.0048
3
0.1468
4
1
298.2
4
2
0.0518
3
1
0.0037
2
1
0.001
2
0.7878
4
1
0.0067
3
0.2074
4
1
298.2
4
2
0.0612
3
1
0.0034
2
1
0.001
2
0.7224
4
1
0.0087
3
0.2724
4
1
298.2
4
2
0.072
3
1
0.0019
2
1
0.001
2
0.6499
4
1
0.0109
3
0.3434
4
1
298.2
4
2
0.0773
3
1
0.0035
2
1
0.001
2
0.6108
4
1
0.0121
3
0.3811
4
1
298.2
4
2
0.0834
3
1
0.0038
2
1
0.001
2
0.5626
4
1
0.0136
3
0.4286
4
1
298.2
4
2
0.0906
3
1
0.0025
2
1
0.001
2
0.4958
4
1
0.0154
3
0.492
4
1
313.2
4
2
0.0229
3
1
0.0025
2
1
0.001
2
0.9447
4
1
0.0021
3
0.0508
3
1
313.2
4
2
0.0322
3
1
0.0026
2
1
0.001
2
0.8991
4
1
0.0033
3
0.0964
3
1
313.2
4
2
0.0394
3
1
0.0033
2
1
0.001
2
0.8658
4
1
0.0043
3
0.128
4
1
313.2
4
2
0.0495
3
1
0.0048
2
1
0.001
2
0.8111
4
1
0.0059
3
0.1824
4
1
313.2
4
2
0.0582
3
1
0.007
2
1
0.001
2
0.7581
4
1
0.0076
3
0.2351
4
1
313.2
4
2
0.0664
3
1
0.005
2
1
0.001
2
0.701
4
1
0.0093
3
0.2913
4
1
313.2
4
2
0.0765
3
1
0.0039
2
1
0.001
2
0.6299
4
1
0.0115
3
0.362
4
1
313.2
4
2
0.0886
3
1
0.0055
2
1
0.001
2
0.5364
4
1
0.0144
3
0.4497
4