Chemgineer
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Posts: 178
Registered: 25-5-2021
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Nitric acid from calcium nitrate
I normally produce nitric acid from magnesium nitrate and sodium bisulfate dry distillation and it works great.
I have however allot of calcium nitrate I want to use but the Nurdrage procedure for the distillation of this with sodium bisulfate works great but
erodes chunks of glass from my flasks and breaks them!
Do you think I should be converting the calcium nitrate to another nitrate salt to avoid this or would a wet distillation of calcium nitrate and
sodium bisulfate be better.... with a fractional distillation of the nitric acid later?
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Rainwater
National Hazard
Posts: 825
Registered: 22-12-2021
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Mood: indisposition to activity
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CaSO4 is a real pain in the !@@ to clean. I experienced glass etching with sodium metabisulfate and CaNO3
It was only noticeable after 3~4 runs
And again with potassium bisulfate(leftovers from making HNO3 via sulfuric acid & potassium nitrate)
I think its the little bit of water trapped in the salt that lets it eat glass if at any point a hydroxide forms.
"You can't do that" - challenge accepted
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