Solid–Liquid Phase Equilibria of the Aqueous Quaternary System Rb+, Cs+, Mg2+//SO42− - H2O at T = 323.2 K
Abstract
:1. Introduction
2. Experimental Section
2.1. Reagents
2.2. Experimental Instruments
2.3. Experimental Procedure and Analytical Method
3. Results and Discussion
3.1. Phase Diagram of Quaternary System Rb+, Cs+, Mg2+//SO42− - H2O at 323.2 K
3.2. Comparison of Rb+, Cs+, Mg2+//SO42− - H2O at 298.2 K and 323.2 K
3.3. Physicochemical Properties of Quaternary System Rb+, Cs+, Mg2+//SO42− - H2O at 323.2 K
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Chemical Agents | CAS No. | Purity (w/w) a | Source | Analysis Method |
---|---|---|---|---|
Rb2SO4 | 7488-54-2 | 0.995 | Jiangxi Dongpeng | alizarin red-S volumetric method [20] |
Cs2SO4 | 10294-54-9 | 0.999 | Jiangxi Dongpeng | |
MgSO4·7H2O | 10034-99-8 | 0.999 | Shanghai Bohr |
Experimental Instruments | Precision | Producer | Type Number | Usage |
---|---|---|---|---|
Analytical balance | 0.0001 g | Sartorius | BSA124S | Weighing |
Thermostat | ±0.2 K | Chongqing Inborn Experiment Instrument | SHH250 | Constant temperature |
X-ray powder diffraction | 1° | Dandong Fangyuan Instrument Co., Ltd. | DX-2700 | Solid phase identification |
Atomic absorption spectroscopy | 0.0001 | iCE 3300, ThermoFisher | iCE 3300 | Liquid phase identification |
No. | Density /ρ(g·cm−3) | Refractive Index | Equilibrium Solutions Composition, w(B) × 102 | Jänecke Index of Dry Salt, J(B) (mol/100 mol S) | Equilibrium Solid Phase b | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|
J(Rb2SO4) + J(Cs2SO4) + J(MgSO4) = 100 | |||||||||||
w(Rb2SO4) | w(Cs2SO4) | w(MgSO4) | w(H2O) | J(Rb2SO4) | J(Cs2SO4) | J(MgSO4) | J(H2O) | ||||
1,A | 1.5309 | 1.3761 | 34.65 | 16.11 | 0.00 | 49.24 | 74.46 | 25.54 | 0.00 | 1568.20 | Rb2SO4 + SS |
2 | 1.5406 | 1.3800 | 34.38 | 16.12 | 0.65 | 48.85 | 72.05 | 24.93 | 3.02 | 1517.33 | Rb2SO4 + SS |
3,S1 | 1.5502 | 1.3804 | 34.46 | 15.70 | 1.36 | 48.48 | 70.24 | 23.61 | 6.15 | 1464.55 | Rb2SO4 + SS + RM |
4,B | 2.0499 | 1.4109 | 1.51 | 65.40 | 0.00 | 33.09 | 3.03 | 96.97 | 0.00 | 985.51 | Cs2SO4 + SS |
5,S2 | 2.0794 | 1.4107 | 5.39 | 59.75 | 0.46 | 34.40 | 10.67 | 87.31 | 2.02 | 1009.68 | Cs2SO4 + SS + CM |
6,C | 2.0338 | 1.4104 | 0.00 | 63.32 | 0.79 | 35.89 | 0.00 | 96.38 | 3.62 | 1097.40 | Cs2SO4 + CM |
7 | 2.0359 | 1.4110 | 3.04 | 60.08 | 0.69 | 36.19 | 6.22 | 90.65 | 3.13 | 1096.89 | Cs2SO4 + CM |
8 | 2.0594 | 1.4105 | 4.32 | 59.52 | 0.58 | 35.58 | 8.72 | 88.68 | 2.60 | 1064.84 | Cs2SO4 + CM |
9,S2 | 2.0794 | 1.4107 | 5.39 | 59.75 | 0.46 | 34.40 | 10.67 | 87.31 | 2.02 | 1009.68 | Cs2SO4 + SS + CM |
10,D | 1.5375 | 1.4075 | 0.00 | 12.37 | 32.92 | 54.71 | 0.00 | 11.11 | 88.89 | 987.05 | M6 + CM |
11 | 1.5313 | 1.4073 | 2.89 | 8.97 | 33.02 | 55.12 | 3.49 | 8.00 | 88.51 | 987.20 | M6 + CM |
12,S3 | 1.5067 | 1.4074 | 3.92 | 7.61 | 33.06 | 55.41 | 4.73 | 6.78 | 88.49 | 991.01 | M6 + RM + CM |
13 | 1.4212 | 1.3913 | 6.87 | 7.32 | 24.43 | 61.38 | 10.34 | 8.13 | 81.54 | 1368.79 | RM + CM |
14 | 1.3397 | 1.3782 | 11.52 | 8.28 | 15.69 | 64.51 | 21.97 | 11.65 | 66.38 | 1823.49 | RM + CM |
15 | 1.3575 | 1.3690 | 17.50 | 9.46 | 8.82 | 64.22 | 39.73 | 15.85 | 44.42 | 2161.01 | RM + CM |
16 | 1.3779 | 1.3673 | 20.84 | 9.36 | 5.82 | 63.98 | 51.26 | 16.99 | 31.75 | 2332.36 | RM + CM |
17,S4 | 1.5169 | 1.3801 | 33.23 | 16.82 | 1.36 | 48.59 | 68.29 | 25.51 | 6.20 | 1480.05 | SS + RM + CM |
18,E | 1.4616 | 1.4027 | 5.60 | 0.00 | 33.51 | 60.89 | 7.01 | 0.00 | 92.99 | 1129.03 | M6 + RM |
19 | 1.4866 | 1.4065 | 4.95 | 5.21 | 32.37 | 57.47 | 6.14 | 4.77 | 89.09 | 1056.82 | M6 + RM |
20,S3 | 1.5067 | 1.4074 | 3.92 | 7.61 | 33.06 | 55.41 | 4.73 | 6.78 | 88.49 | 991.01 | M6 + RM + CM |
21,F | 1.4030 | 1.3704 | 38.06 | 0.00 | 1.43 | 60.51 | 92.31 | 0.00 | 7.69 | 2175.04 | Rb2SO4 + RM |
22 | 1.4687 | 1.3730 | 37.03 | 6.71 | 1.42 | 54.84 | 82.05 | 10.97 | 6.98 | 1800.94 | Rb2SO4 + RM |
23 | 1.5043 | 1.3825 | 36.48 | 10.37 | 1.39 | 51.76 | 77.26 | 16.21 | 6.53 | 1624.77 | Rb2SO4 + RM |
24 | 1.5228 | 1.3810 | 35.64 | 13.69 | 1.37 | 49.30 | 73.06 | 20.71 | 6.23 | 1497.90 | Rb2SO4 + RM |
25,S1 | 1.5502 | 1.3804 | 34.46 | 15.70 | 1.36 | 48.48 | 70.24 | 23.61 | 6.15 | 1464.55 | Rb2SO4 + SS + RM |
26,S4 | 1.5169 | 1.3801 | 33.23 | 16.82 | 1.36 | 48.59 | 68.29 | 25.51 | 6.20 | 1480.05 | SS + RM + CM |
27 | 1.5273 | 1.3812 | 32.43 | 17.45 | 1.31 | 48.81 | 67.27 | 26.71 | 6.03 | 1500.51 | SS + CM |
28 | 1.5931 | 1.3862 | 29.69 | 26.06 | 1.23 | 43.02 | 57.49 | 37.23 | 5.28 | 1234.55 | SS + CM |
29 | 1.7277 | 1.3910 | 24.80 | 33.67 | 1.14 | 40.39 | 47.54 | 47.62 | 4.85 | 1147.41 | SS + CM |
30 | 1.7820 | 1.3961 | 22.81 | 40.29 | 1.05 | 35.85 | 41.57 | 54.18 | 4.25 | 968.41 | SS + CM |
31 | 1.8435 | 1.4008 | 19.79 | 45.99 | 0.99 | 33.23 | 35.39 | 60.68 | 3.93 | 880.74 | SS + CM |
32 | 1.9604 | 1.4087 | 16.13 | 48.68 | 0.72 | 34.47 | 30.07 | 66.95 | 2.98 | 952.34 | SS + CM |
33 | 1.9833 | 1.4095 | 16.01 | 56.33 | 0.78 | 26.88 | 27.00 | 70.08 | 2.92 | 671.79 | SS + CM |
34 | 2.0278 | 1.4110 | 13.71 | 56.06 | 0.84 | 29.39 | 24.08 | 72.65 | 3.27 | 765.05 | SS + CM |
35 | 2.0586 | 1.4116 | 10.41 | 60.71 | 0.93 | 27.95 | 18.18 | 78.22 | 3.60 | 723.37 | SS + CM |
36,S2 | 2.0794 | 1.4107 | 5.39 | 59.75 | 0.46 | 34.40 | 10.67 | 87.31 | 2.02 | 1009.68 | Cs2SO4 + SS + CM |
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Yu, Z.; Zeng, Y.; Li, X.; Sun, H.; Li, L.; He, W.; Chen, P.; Yu, X. Solid–Liquid Phase Equilibria of the Aqueous Quaternary System Rb+, Cs+, Mg2+//SO42− - H2O at T = 323.2 K. Separations 2024, 11, 309. https://doi.org/10.3390/separations11110309
Yu Z, Zeng Y, Li X, Sun H, Li L, He W, Chen P, Yu X. Solid–Liquid Phase Equilibria of the Aqueous Quaternary System Rb+, Cs+, Mg2+//SO42− - H2O at T = 323.2 K. Separations. 2024; 11(11):309. https://doi.org/10.3390/separations11110309
Chicago/Turabian StyleYu, Zhangfa, Ying Zeng, Xuequn Li, Hongbo Sun, Longgang Li, Wanghai He, Peijun Chen, and Xudong Yu. 2024. "Solid–Liquid Phase Equilibria of the Aqueous Quaternary System Rb+, Cs+, Mg2+//SO42− - H2O at T = 323.2 K" Separations 11, no. 11: 309. https://doi.org/10.3390/separations11110309