Purification of Wet-Process Phosphoric Acid via Donnan Dialysis with a Perfluorinated Sulfonic Acid Cation-Exchange Membrane
Abstract
:1. Introduction
2. Materials and Methods
2.1. Chemicals and Membranes
2.2. Analysis Methods
2.3. Donnan Dialysis Process
2.4. Absorption Experiments
3. Results and Discussions
3.1. Membrane Morphology Analysis
3.2. Removal of Metallic Cations from Industrial Wet-Process Phosphoric Acid
3.3. Removal of Metallic Cations from Synthetic Mixed Metallic Cations Phosphoric Acid
3.4. Removal of Metallic Cations from Synthetic Single Metallic Cations Phosphoric Acid
3.5. Existing form of Metallic Cations in the Membrane
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Target Components | P2O5(H3PO4) [wt.%] | Fe3+ [wt.%] | Al3+ [wt.%] | Mg2+ [wt.%] |
26.57 (36.67) | 0.66 | 0.27 | 0.39 | |
Other components | Ca2+ [wt.%] | K+ [wt.%] | Na+ [wt.%] | F− [wt.%] |
0.08 | 0.03 | 0.01 | 1.47 |
Product Code | DMR100M | |
---|---|---|
Dimensions | Dry film thickness [μm] | 15 ± 1 |
Wet film thickness [μm] | 19 ± 1 | |
Parameters | Conductivity [mS cm−1] | 68.6 (H+ form) |
Areal density [g m−2] | 28 ± 1 | |
Ion exchange capacity [mmol g−1] | 1.57 | |
Materials | Perfluorinated sulfonic acid polymer, polypropylene reinforcement |
Sample Acid Types | Removed Fe3+ [mg] | Removed Al3+ [mg] | Removed Mg2+ [mg] | Total Charges Removed [mequ.] |
---|---|---|---|---|
WPA | 2.79 | 4.76 | 21.91 | 2.48 |
MPA | 4.86 | 4.27 | 19.07 | 2.30 |
Fe3+-SPA | 5.60 | / | / | 0.30 |
Al3+-SPA | / | 6.49 | / | 0.72 |
Mg2+-SPA | / | / | 24.04 | 1.98 |
Sample Acid Type | P [mg] | Fe3+ [mg] | Al3+ [mg] | Mg2+ [mg] | Target Metal/P [mol/mol] |
---|---|---|---|---|---|
Fe3+-SPA | 0.010 | 0.230 | 0.010 | 0.100 | 13.180 |
Al3+-SPA | 0.010 | 0.001 | 1.030 | 0 | 118.366 |
Mg2+-SPA | 0.010 | 0 | 0.015 | 3.091 | 398.581 |
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Zhong, Q.; Luo, T.; Yan, Z.; Yang, L.; Zhang, Z.; Wang, X. Purification of Wet-Process Phosphoric Acid via Donnan Dialysis with a Perfluorinated Sulfonic Acid Cation-Exchange Membrane. Membranes 2021, 11, 298. https://doi.org/10.3390/membranes11040298
Zhong Q, Luo T, Yan Z, Yang L, Zhang Z, Wang X. Purification of Wet-Process Phosphoric Acid via Donnan Dialysis with a Perfluorinated Sulfonic Acid Cation-Exchange Membrane. Membranes. 2021; 11(4):298. https://doi.org/10.3390/membranes11040298
Chicago/Turabian StyleZhong, Qin, Tao Luo, Zhengjuan Yan, Lin Yang, Zhiye Zhang, and Xinlong Wang. 2021. "Purification of Wet-Process Phosphoric Acid via Donnan Dialysis with a Perfluorinated Sulfonic Acid Cation-Exchange Membrane" Membranes 11, no. 4: 298. https://doi.org/10.3390/membranes11040298
APA StyleZhong, Q., Luo, T., Yan, Z., Yang, L., Zhang, Z., & Wang, X. (2021). Purification of Wet-Process Phosphoric Acid via Donnan Dialysis with a Perfluorinated Sulfonic Acid Cation-Exchange Membrane. Membranes, 11(4), 298. https://doi.org/10.3390/membranes11040298