Ammonium → Tricalcium Phosphate

HRID 1757928Notes

Reaction equation

HRID 1757928 reaction equation
[N+]([O-])([O-])=O.[Ca+2:5].[N+]([O-])([O-])=O.[NH4+].[P:11]([O-:15])([O-:14])([O-:13])=[O:12].[NH4+].[NH4+].[NH4+].[Ca]>>[P:11]([O-:15])([O-:14])([O-:13])=[O:12].[Ca+2:5].[P:11]([O-:15])([O-:14])([O-:13])=[O:12].[Ca+2:5].[Ca+2:5]

Participants

5

Reactant 4

HCID 223AmmoniumHCID 24963Calcium nitrateHCID 159282Ammonium phosphate, tribasicHCID 5460341Calcium

Product 1

HCID 24456Tricalcium Phosphate

Procedure

A solution of calcium nitrate was added with aqueous ammonium to adjust the pH value thereof to pH 12, to which was added ammonium phosphate until the molar ratio of calcium to phosphor reached 1.67. The precipitate was filtered and washed with water sufficiently to obtain a powder of amorphous calcium phosphate, to which water was added to prepare a slurry A. To 100 parts, by weight, of this slurry A was added 0.5 parts, by weight, of the same foaming agent as used in Example 1 to prepare a slurry B.

Workup

  1. filtrationThe precipitate was filtered
  2. washwashed with water sufficiently

Sources & evidence

ORD record
ord-57d144d2a5b141c4aebdf0de464a9b54
Source dataset
uspto-grants-1983_02
Patent number
US04371484

Reaction notes

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