Discussion on the process for removing sulfate ions from brine in the chlor-alkali industry!
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The common processes for removing sulfate ions from brine in China currently include the following: 1. Barium chloride method； 2. SRS excluding sulfate ions ； 3. The new CIM method developed by Kaimo Company. After removing sulfate ions, the resulting sodium sulfate is recovered by freezing, yielding mirabilite as a by-product. All methods except sulfuric acid are mature processes, but the process for producing mirabilite by freezing is not yet fully developed. Please participate in the discussion: 1. Characteristics of various processes for removing sulfate ions ； 2. Freezing process. Thank you all!
The membrane method still works. But for freezing, I think there’s a lot of blowing involved
The freezing method is effective, but it has high energy consumption; therefore, it is used relatively little in China at present!
Stop freezing it; just use thermal evaporation to separate the two products, salt and mirabilite