sulfate ion
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This post was last edited by sunjl1981 on 2013-1-6 20:48. What is the effect of sulfate and chlorate ions during the electrolysis process on the ion exchange membrane? # hcbbs
1# *nfahuagong Sulfate ions can hinder the discharge of chloride ions at the anode, resulting in the production of oxygen, which reduces the purity of chlorine gas and lowers current efficiency. Chlorates decompose into hypochlorite ions under acidic conditions, producing free chlorine that poisons the resin and corrodes the electrolyzer.
Then why isn’t the sulfate completely removed in one step using saltwater?
Who said it can’t be completely removed? Which factory keeps half and leaves the other half? Removing impurities is not meant to be retained; it is limited by the cost and extent of complete removal.
Sulfate ions do not need to be removed to such an extreme degree; too low a level is also undesirable. When the concentration of SO42- in the saline solution is too low, although less Na2SO4 precipitates on the membrane, this low level of SO42- fails to prevent I- ions from penetrating the membrane, which can lead to damage to the membrane and a reduction in current efficiency.
Friend upstairs, please explain in detail. I can’t figure out the logic behind it! !