Calcium hydrogen phosphate → Calcium Sulfate

Reaction equation

[P:1]([OH:5])([O-:4])([O-:3])=[O:2].[Ca+2:6].[S:7]([O-:11])([O-:10])(=[O:9])=[O:8].[K+:12].[K+]>>[OH:3][P:1]([O-:5])([OH:4])=[O:2].[K+:12].[S:7]([O-:11])([O-:10])(=[O:9])=[O:8].[Ca+2:6]

Participants

Reactant 2

HCID 24441Calcium hydrogen phosphate

HCID 24507Potassium Sulfate

Product 2

HCID 24497Calcium Sulfate

HCID 516951Monobasic potassium phosphate

Procedure

The monocalcium phosphate solid was then reacted with a stoichiometric amount of potassium sulfate in aqueous solution to form KH2PO4 and calcium sulfate. The calcium sulfate precipitate is separated by filtration and recovered. The solution or filtrate from this filtration is subjected to evaporation for the precipitation of potassium dihydrogen phosphate which is then recovered by filtration.

Sources & evidence

ORD record: ord-69221cc586c3416ab79be782b0824c28
Source dataset: uspto-grants-1980_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04222990

Reaction notes

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