Sulfuric Acid → Sodium Sulfate

HRID 275238

Reaction equation

[Cr:1]([O-:5])([O-:4])(=[O:3])=[O:2].[Na+:6].[Na+].[S:8](=[O:12])(=[O:11])([OH:10])[OH:9]>>[O-:2][Cr:1]([O:5][Cr:1]([O-:4])(=[O:3])=[O:2])(=[O:4])=[O:3].[Na+:6].[Na+:6].[S:8]([O-:12])([O-:11])(=[O:10])=[O:9].[Na+:6].[Na+:6]

Participants

Reactant 2

HCID 1118Sulfuric Acid

HCID 24488Sodium Chromate

Product 2

HCID 24436Sodium Sulfate

HCID 25408Sodium Dichromate

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-910d083f5c35472881695333c7bda4d1
Source dataset: uspto-grants-1995_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05393503

Linked notes

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