Phosphoric Acid → Tricalcium Phosphate

HRID 1198378Notes

Reaction equation

HRID 1198378 reaction equation
[P:1](=[O:5])([OH:4])([OH:3])[OH:2].[OH-].[Ca+2:7].[OH-]>>[O-:3][P:1]([O-:5])([O-:4])=[O:2].[O-:3][P:1]([O-:5])([O-:4])=[O:2].[Ca+2:7].[Ca+2:7].[Ca+2:7]

Participants

3

Reactant 2

HCID 1004Phosphoric AcidHCID 6093208Calcium Hydroxide

Product 1

HCID 24456Tricalcium Phosphate

Procedure

As aqueous solution of phosphoric acid was reacted with a suspension of calcium hydroxide by a conventional method. The reaction product was dried and calcined at 1,200° C. to obtain α-tricalcium phosphate in powder form. 2 grams of this powder was mixed with 1 g of a setting solution having a viscosity at room temperature of 6,000 cp prepared by dissolving 0.1 g of chitosan ("Flonac N" made by Kyowa Yushi Kogyo K. K.) in 10 g of an aqueous solution of 40% citric acid. A plastic gum-like composition was obtained and this composition set in about 7 minutes to produce a setting material having a high strength.

Workup

  1. customThe reaction product was dried
  2. customcalcined at 1,200° C.

Sources & evidence

ORD record
ord-f86e9851ec1c4f6f89123091a2377170
Source dataset
uspto-grants-1994_01
Patent number
US05281404

Reaction notes

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