Dechlorination of spent sulfuric acid using sodium sulfite
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About 70-80% of the waste sulfuric acid contains trace amounts of free chlorine, around 0.05%. I want to add sodium sulfite to it in order to remove the chlorine, and conduct a small experiment to see how effective this is. Sodium sulfite reacts with chlorine, but sulfuric acid also reacts with chlorine as well. Will chlorine react first, or do these two reactions occur simultaneously? How can we ensure that chlorine reacts as much as possible with sodium sulfite while minimizing the reaction of sulfuric acid? . . So conflicted
Pilot tests can be conducted; our company is quite experienced in dealing with waste sulfuric acid, and we use it after processing it.
How do you handle waste sulfuric acid?
It’s company confidential, sorry.
Give it a try; it’s not difficult. There are some things to keep in mind during the reaction process. If it’s done well, then it’s a success.
If you want to remove trace amounts of chloride ions from concentrated sulfuric acid, I’d say you’re overthinking it – don’t waste time. If you want to know how to recover sulfuric acid, search for \"sulfuric acid recovery\"