Sulfuric Acid → Chromic Acid

HRID 275239Notes

Reaction equation

[O-:1][Cr:2]([O:5][Cr]([O-])(=O)=O)(=[O:4])=[O:3].[Na+:10].[Na+].[S:12](=[O:16])(=[O:15])([OH:14])[OH:13]>>[Cr:2]([OH:5])([OH:4])(=[O:3])=[O:1].[S:12](=[O:14])(=[O:13])([OH:16])[O-:15].[Na+:10]

Participants

Reactant 2

HCID 1118Sulfuric Acid

HCID 25408Sodium Dichromate

Product 2

HCID 24425Chromic Acid

HCID 516919Sodium Bisulfate

Procedure

Disclosed is an improvement on a process in which sodium chromate is reacted with sulfuric acid to produce sodium bichromate and sodium sulfate, and the sodium bichromate is reacted with sulfuric acid to produce chromic acid and sodium bisulfate. In the improvement, the sodium sulfate and sodium bisulfate are reacted with hydrogen chloride to produce sulfuric acid, which is recycled, and sodium chloride.

Sources & evidence

ORD record: ord-c4e75510fe2a467cb2d27a0588aba0b1
Source dataset: uspto-grants-1995_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05393503

Reaction notes

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