I suggested a purely aqueous path for many acids of interest in my now old Oxalic acid route (see https://www.sciencemadness.org/whisper/viewthread.php?tid=18... ). Here is an extract concerning HNO3:
Quote: Originally posted by Formatik | ......
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Nitric acid from copper nitrate and oxalic acid:
Aqueous copper nitrate and oxalic acid when mixed immediately gave a light green-blue precipitate (same one as by copper sulfate). This is one way to
recover nitric acid from copper nitrate. Calcium nitrate should also work instead of copper nitrate. So, oxalic acid is yet another acid that will
liberate nitric acid from some nitrates.
Both hydrochloric and nitric acids unlike sulfuric acid are very easy to purify by distillation.
[Edited on 11-5-2012 by Formatik] |
But, please read the whole thread as even aqueous path can produce, on occasions, some unsafe surprises!
[Edited on 29-10-2015 by AJKOER] |