Calcium Carbonate → Tetracalcium phosphate
Reaction equation
[O-:1][P:2]([O:5]P([O-])([O-])=O)(=[O:4])[O-:3].[Ca+2:10].[Ca+2].C(=O)([O-])[O-].[Ca+2]>>[P:2]([O-:5])([O-:4])([O-:3])=[O:1].[Ca+2:10].[Ca+2:10].[Ca+2:10].[Ca+2:10]Participants
3
Procedure
Calcium pyrophosphate was reacted with calcium carbonate by a conventional method, and calcined to obtain tetracalcium phosphate in powder form. 2 grams of this powder was mixed with 1 g of a setting solution prepared by dissolving 0.1 g of chitosan ("Flonac N" made by Kyowa Yushi Kogyo K.K.) and 3 g of saccharose in 10 g of an aqueous solution of 40% citric acid. A plastic gum-like composition was obtained and this composition set in about 5 minutes to produce a setting material having a high strength.
Sources & evidence
- ORD record
- ord-5b024dc33559497b99a119123f769a64
- Source dataset
- uspto-grants-1993_01
- Patent number
- US05180426
Reaction notes
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