Ammonium Bicarbonate → Ethylenediaminetetraacetic Acid

HRID 1389046Notes

Reaction equation

C(=O)(O)[O-].[NH4+].[CH2:6]([N:17]([CH2:22][C:23]([OH:25])=[O:24])[CH2:18][C:19]([OH:21])=[O:20])[CH2:7][N:8]([CH2:13][C:14]([O-:16])=[O:15])[CH2:9][C:10]([OH:12])=[O:11].[NH4+].[Fe:27]>>[Fe:27].[CH2:7]([N:8]([CH2:13][C:14]([OH:16])=[O:15])[CH2:9][C:10]([OH:12])=[O:11])[CH2:6][N:17]([CH2:22][C:23]([OH:25])=[O:24])[CH2:18][C:19]([OH:21])=[O:20]

Participants

Reactant 2

HCID 14013Ammonium Bicarbonate

HCID 4535858921265-50-9

Product 2

HCID 6049Ethylenediaminetetraacetic Acid

HCID 23925Iron

Procedure

passing through the ore deposit an aqueous leach solution comprising essentially from about 0.3 to 5 grams per liter of ammonium bicarbonate, sufficient ferric ammonium EDTA to provide from about 3 to 100 ppm of iron, with an EDTA:Fe ratio of at least 1.25:1, and from about 0.1 to 3 grams per liter of H2O2, the leach solution having a pH of between 7.4 and 9.5, the leach solution converting any tetravalent uranium it contacts to the hexavalent state which readily dissolves in the leach solution,

Sources & evidence

ORD record: ord-ddfa6fbb36714465b8a4d049d3b79659
Source dataset: uspto-grants-1981_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04243638

Reaction notes

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