Sulfuric Acid → Phosphoric Acid

HRID 1277504Notes

Reaction equation

[S:1](=[O:5])(=[O:4])([OH:3])[OH:2].[P:6]([OH:10])([O-:9])([O-:8])=[O:7].[Ca+2:11]>>[S:1]([O-:5])([O-:4])(=[O:3])=[O:2].[Ca+2:11].[P:6](=[O:7])([OH:10])([OH:9])[OH:8]

Participants

Reactant 2

HCID 1118Sulfuric Acid

HCID 24441Calcium hydrogen phosphate

Product 2

HCID 1004Phosphoric Acid

HCID 24497Calcium Sulfate

Procedure

adding sulfuric acid to the crystallization slurry to react with at least the monocalcium phosphate to form solid calcium sulfate and phosphoric acid, the crystallization slurry being maintained at a soluble sulfate concentration greater than the soluble surface concentration of the dissolving slurry;

Sources & evidence

ORD record: ord-76fb62f2d6dd43f3a357f4404411acd3
Source dataset: uspto-grants-1981_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04277448

Reaction notes

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