How to remove nitrate ions from sulfuric acid
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I recently purchased a batch of industrial sulfuric acid, but the nitrate level was too high. Could everyone please suggest something that can be added to remove it, without causing the formation of other substances that cannot be removed. I thank those who helped me. Thank you once again.
Add hydrogen peroxide and urea. Air oxidation can reduce nitrogen oxides to nitrogen, which is then released.
The sulfuric acid you are using is a by-product of organic chemical manufacturing; the sulfuric acid produced in sulfuric acid plants has a very low nitrate content (almost negligible). I recall that sulfuric acid produced by nitration methods also has a low nitrate content, and heating or stirring while exposing it to air can help to release the nitrogen oxides.
Excuse me, what is the principle behind this? Hydrogen peroxide oxidizes urea; then what acts as the reducing agent? And what is the role of air?