Calcium hydrogen phosphate → Phosphoric Acid

HRID 971590

Reaction equation

HRID 971590 reaction equation
[P:1]([OH:5])([O-:4])([O-:3])=[O:2].[Ca+2].S([O-])([O-])(=O)=O.[K+:12].[K+]>>[OH:3][P:1]([O-:5])([OH:4])=[O:2].[K+:12].[OH:3][P:1]([OH:5])([OH:4])=[O:2]

Participants

4

Reactant 2

HCID 24441Calcium hydrogen phosphateHCID 24507Potassium Sulfate

Product 2

HCID 1004Phosphoric AcidHCID 516951Monobasic potassium phosphate

Procedure

In an alternative reaction, the solid monocalcium phosphate is reacted with potassium sulfate to yield primarily KH2PO4 with little or no H3PO4 coproduct. Conversely, if a portion of the (uncrystallized) MCP/H3PO4 liquor is reacted with potassium sulfate the resulting KH2PO4 /H3PO4 solution will have a plant food value of 0-24-6. A portion of any of the K2O products may be recycled back to the acidulation vessel to provide makeup for the K2O lost in the hydrolysis sector.

Workup

  1. customIn an alternative reaction

Sources & evidence

ORD record
ord-acfaae36f9f6446483e0fe04cae3fdb4
Source dataset
uspto-grants-1979_07
Patent number
US04160657

Linked notes

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