Method for detecting free chlorine in spent sulfuric acid
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The chlor-alkali production process generates large amounts of waste sulfuric acid, which contains free chlorine. I now want to determine the level of free chlorine; I’m not sure if there are any appropriate testing methods for this. Personally, I think the sodium thiosulfate titration method is not suitable.
Are there any more efficient ways to utilize waste sulfuric acid in the same industry?
It should be feasible to use the indirect iodimetric method under neutral or weakly acidic conditions.