Can sodium sulfite and dilute sulfuric acid indeed react?
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Can sodium sulfite indeed react with dilute sulfuric acid? Is 70%-80% of sulfuric acid considered dilute or concentrated? When removing chlorine from waste sulfuric acid, a small amount of sodium sulfite is added to react with the chlorine; will this sodium sulfite also react with the sulfuric acid at the same time, or will it react with the sulfuric acid only after it has finished reacting with the chlorine?
Sodium sulfite and sulfuric acid react to produce sodium sulfate, water, and sulfur dioxide; however, it is not clear whether sodium sulfite reacts first with chlorine or with sulfuric acid – it is likely that the reactions occur simultaneously. A concentration of 70-80% is considered a dilute acid when used for drying chlorine
70–80 definitely refers to dilute sulfuric acid. For dechlorination, compressed air or nitrogen is generally used for reverse blowing first, after which sodium hydrosulfite is added to carry out a redox reaction; it should react with chlorine first
Sodium bisulfite is not required; chlorine can be removed to PPM levels directly. For inquiries, please contact: 294486893