froot
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Nitric acid from urea nitrate?
Considering the ease of how one can produce urea nitrate from dilute nitric acid, and the formula; CO(NH2)2.HNO3
Would it be possible to chemically or electrolyitically seperate the HNO3 from the urea producing concentrated nitric acid?
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vulture
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Assume you can seperate the nitric acid from the urea in a reaction vessel. You now have conc nitric acid and urea together in one vessel. What's
going to happen?
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chemoleo
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You will electrolyse water, getting H2 and O2 
Urea nitrate will just aid the conductivity. Of course there is a chance (under some conditions) that the urea reacts somehow, in ways I wouldnt dare
to speculate (i.e. the Kolbe reaction isn't exactly predictable if you don't know about it, and yet carboxylic acids are definitely affected
by electrolysis).
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unionised
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Vulture,
quite possibly what will happen is the same as what happens when molten NaCl is electrolysed commercially. The 2 products are kept physically
separated, tapped off and sold.
I don't see it working well but you should be able to get some separation.
Another game to play might be the use of an ion exchange resin to swap protons for protonated urea; unfortunately I don't think this will work
any better.
When it comes down to it, distillation looks like a much better bet.
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