Separation of sodium chloride and sodium sulfate salts
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Request a flowchart for the thermal salt separation process of sodium chloride and sodium sulfate. Or the phase diagram of the sodium sulfate, sodium chloride, water, and salt system.
Direct nanofiltration is used for separation; many industrial parks now employ this method. For example, wastewater from printing and dyeing industries is treated to separate salts, and the high-purity salts obtained can be reused in the original factories. You can add me on WeChat: 139 8183 3774
The NF operated by the owner does not perform well
Yes, the freezing method is used. However, it’s not easy to find the phase diagram of water-salt systems
This post was last edited by rujunsun on 2020-4-9 at 11:54: https://bbs.hcbbs.com/thread-551415-1-1.html. You should be able to find the information there (Production of anhydrous mirabilite using the complete dissolution method)
Denitration by membrane method (nanofiltration membrane filtration), followed by cooling and crystallization of the nitrate-rich solution to produce mirabilite monohydrate, then dissolution, evaporation and crystallization, centrifugal separation, and drying to produce anhydrous sodium sulfate.
After all, it still comes down to economic feasibility.