Phosphoric Acid → Tricalcium Phosphate

HRID 506419Notes

Reaction equation

HRID 506419 reaction equation
[P:1](=[O:5])([OH:4])([OH:3])[OH:2].C(=O)([O-])[O-].[Ca+2:10]>>[P:1]([O-:5])([O-:4])([O-:3])=[O:2].[Ca+2:10].[P:1]([O-:5])([O-:4])([O-:3])=[O:2].[Ca+2:10].[Ca+2:10]

Participants

3

Reactant 2

HCID 1004Phosphoric AcidHCID 10112Calcium Carbonate

Product 1

HCID 24456Tricalcium Phosphate

Procedure

10% phosphoric acid was added dropwise to a 20% aqueous slurry of calcium carbonate (Super #2000, manufactured by Maruo Calcium Company Limited) at a Ca/P mole ratio=3.33 under stirring aid, thereafter, this was stirred at 50° C. for 3 hours to obtain a white slurry. The white slurry was dehydrated using a filter press to obtain calcium phosphate I. It was confirmed by X-ray diffraction that the resulting white cake is a mixture of hydroxyapatite and calcite type calcium carbonate.

Workup

  1. stirringthis was stirred at 50° C. for 3 hours
  2. customto obtain a white slurry

Sources & evidence

ORD record
ord-10aa25e2191b4e1a8774158656190357
Source dataset
uspto-grants-2010_08
Patent number
US07785705B2

Reaction notes

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