What are the methods for treating sodium sulfate in chlor-alkali production?
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Experts from the chlor-alkali plants, could you tell us about your electrolysis processes and the methods used to handle sulfate ions?
Sodium sulfate can be combined with calcium chloride to form calcium sulfate precipitate, while the sodium chloride solution can be reused as raw material for salt production. Calcium sulfate dihydrate can be used to produce high-strength gypsum and construction gypsum, thereby supporting the development of the prefabricated housing industry by providing gypsum-based building materials.
The NaNO3 membrane was removed, and the concentrated water was sent to the soda ash plant
Membrane method (nanofiltration membrane filtration), barium method (addition of barium chloride), calcium method (addition of calcium chloride)