chucknorris
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Fractional distillation of WFNA and water in inert gas with H2SO4?
Long story short, aside for another process that leaves 68% azeotropic HNO3 as a leftover, is it possible to create chain distillation with
fractionating as per following method:
The receiver where the 68% HNO3 flows, has sulfuric acid in it which is preheated to somewhere 200C where the sulfuric acid will remain concentrated.
If we flow 68% HNO3 there and it boils over and we boil it with fractionating column, will it distill as an azeotrope or will it separate as 99% WFNA
and water? If this doesnt work, is there any way so that the reaction could be made non-stop so that you put 68% HNO3 from other end and receive 99%
HNO3 from other end?
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hissingnoise
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| Quote: | | The receiver where the 68% HNO3 flows, has sulfuric acid in it which is preheated to somewhere 200C where the sulfuric acid will remain concentrated.
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On distillation, H2SO4 retains the water present in conc. HNO3!
Better to stick with the tried-and-trusted batch process. IMO . . .
And the azeotrope boils @ 120°C ─ above this, HNO3 decomposition is extensive and water may be forced into the distillate!
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