Calcium Carbonate → Tricalcium Phosphate

HRID 2176443Notes

Reaction equation

HRID 2176443 reaction equation
[OH:1][P:2]([O-:5])([O-:4])=[O:3].[Ca+2:6].C(=O)([O-])[O-].[Ca+2]>[Pt].O>[O-:3][P:2]([O-:5])([O-:4])=[O:1].[O-:3][P:2]([O-:5])([O-:4])=[O:1].[Ca+2:6].[Ca+2:6].[Ca+2:6]

Participants

5

Reactant 2

HCID 10112Calcium CarbonateHCID 24441Calcium hydrogen phosphate

Product 1

HCID 24456Tricalcium Phosphate

Reagents, catalysts & solvents 2

HCID 23939PlatinumCatalyst2×HCID 962WaterSolvent

Conditions

Temperature
1400 °C

Procedure

For a mixture of 500 g (dry weight), 360 g dicalcium phosphate anhydrous powder, 144 g calcium carbonate powder and 220 ml deionized water were mixed for 7 minutes at 500 rpm using a laboratory stirrer. The slurry from the mixing process was immediately transferred into a high temperature stable platinum cup. The filled platinum cup was placed in a cold furnace. The furnace was heated to 1400° C. by using a heating rate of 60° C. per hour. The heating process was stopped after 72 hours by switching off the furnace. The sample was cooled down to room temperature within the furnace. The bulk sintered material (phase pure α-Ca3(PO4)2) was removed from the furnace and the platinum cup. The bulk product from the sintering process had a weight of 420 g (weight loss 16.7%). The control of phase purity was performed using powder X-ray diffraction analysis.

Workup

  1. additionwere mixed for 7 minutes at 500 rpm
  2. temperatureThe sample was cooled down to room temperature within the furnace
  3. customThe bulk sintered material (phase pure α-Ca3(PO4)2) was removed from the furnace

Sources & evidence

ORD record
ord-f9e4900fb6084d95b70a4ce42e6b3f7f
Source dataset
uspto-grants-2015_06
Patent number
US09066995B2

Reaction notes

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