Sulfuric Acid → Phosphoric Acid

HRID 1277503Notes

Reaction equation

HRID 1277503 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]>>[OH2:2].[OH2:7].[S:1]([O-:5])([O-:4])(=[O:3])=[O:2].[Ca+2:11].[P:6](=[O:7])([OH:10])([OH:9])[OH:8]

Participants

4

Reactant 2

HCID 1118Sulfuric AcidHCID 24441Calcium hydrogen phosphate

Product 2

HCID 1004Phosphoric AcidHCID 24928Calcium Sulfate Dihydrate

Procedure

adding sulfuric acid to the crystallization slurry to react with at least the monocalcium phosphate to form calcium sulfate dihydrate and phosphoric acid, while maintaining the crystallization slurry at a soluble sulfate concentration of from about +0.5% to about +3.0%; the soluble sulfate concentration of the crystallization slurry being greater than the soluble sulfate concentration of the dissolving slurry;

Sources & evidence

ORD record
ord-1b1ec09c8bfc4f27a0f92242f77d1bda
Source dataset
uspto-grants-1981_07
Patent number
US04277448

Reaction notes

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