Nitric Acid → Carbon Dioxide

HRID 1995053Notes

Reaction equation

HRID 1995053 reaction equation
[U].[N+:2]([O-:5])([OH:4])=[O:3].[C:6](=O)([OH:8])[O-:7].[NH4+:10].[OH-].[Ca+2:12].[OH-].C(=O)([O-])[O-].[Ca+2]>O>[C:6](=[O:8])=[O:7].[N+:2]([O-:5])([O-:4])=[O:3].[Ca+2:12].[N+:2]([O-:5])([O-:4])=[O:3].[N+:2]([O-:5])([O-:4])=[O:3].[NH4+:10]

Participants

9

Reactant 5

HCID 944Nitric AcidHCID 10112Calcium CarbonateHCID 14013Ammonium BicarbonateHCID 239894-(N,N-Dimethyl-n-tetradecylammonium)methyl-(7-hydroxycoumarin) chlorideHCID 6093208Calcium Hydroxide

Product 3

HCID 280Carbon DioxideHCID 22985Ammonium nitrateHCID 24963Calcium nitrate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

The resultant water solution containing trace quantities of uranium among other possible components, with a basic pH higher than about 8, is then acidified to the extent of lowering the pH to less than about 6, and preferably to within a range of about 5 to about 4, by the addition thereto of a mineral acid such as nitric acid. This acidification decomposes any of the water-contained ammonium bicarbonate (NH4HCO3), calcium hydroxide and calcium carbonate (CaCO3) to form carbon dioxide, calcium nitrate (Ca(NO3)2) and ammonium nitrate (NH4NO3), in addition to converting uranium compounds present to uranyl nitrate (UO2 (NO3)2).

Workup

  1. additionpreferably to within a range of about 5 to about 4, by the addition

Sources & evidence

ORD record
ord-3fe9d88544e44321a7784807e5749b33
Source dataset
uspto-grants-1983_09
Patent number
US04402918

Reaction notes

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