Reaktion #1076742

ord-b80a1c54b00442ef9e8d5fa0d4abfda0

Reaktionsgleichung

O=[N+]([O-])[O-].O=[N+]([O-])[O-].[Ca+2]
calcium nitrate salt
O.O.O=P([O-])([O-])[O-].[Ca+2].[Ca+2]
dicalcium phosphate dihydrate
C1=CC2C(C1)[C@@H]1C=C[C@H]2C1
DCPD
O=P([O-])([O-])OP(=O)([O-])[O-].[Ca+2].[Ca+2]
calcium pyrophosphate
C1=CC2C(C1)[C@@H]1C=C[C@H]2C1
DCPD
→
O=P([O-])([O-])[O-].O=P([O-])([O-])[O-].[Ca+2].[Ca+2].[Ca+2]
Calcium Phosphate

Edukte

O=[N+]([O-])[O-].O=[N+]([O-])[O-].[Ca+2]
calcium nitrate salt
O.O.O=P([O-])([O-])[O-].[Ca+2].[Ca+2]
dicalcium phosphate dihydrate
C1=CC2C(C1)[C@@H]1C=C[C@H]2C1
DCPD
—
CaHPO4.2H2O
O=P([O-])([O-])OP(=O)([O-])[O-].[Ca+2].[Ca+2]
calcium pyrophosphate
C1=CC2C(C1)[C@@H]1C=C[C@H]2C1
DCPD

Reagenzien

O=P([O-])([O-])O.O=P([O-])([O-])O.O=P([O-])([O-])[O-].O=P([O-])([O-])[O-].O=P([O-])([O-])[O-].O=P([O-])([O-])[O-].O=P([O-])([O-])[O-].O=P([O-])([O-])[O-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Fe+2].[Mg+2]
whitlockite

Reaktionsbedingungen

Temperatur
500°CELSIUS
Detaillierte Bedingungen
See reaction.notes.procedure_details.

Aufarbeitung

  1. 1
    Sonstigeas precipitated material (no agitation
  2. 2
    TemperaturWarming of the sample to >25° C.
  3. 3
    Sonstigean exothermic reaction
  4. 4
    Sonstigeresulting in the formation of a white, pasty solid
  5. 5
    TemperaturHeat treatment and X-ray diffraction of this solid

Vorschrift

Example 1 was repeated with the addition of 10.00 g dicalcium phosphate dihydrate, DCPD, CaHPO4.2H2O (Aldrich Chemical Co., Inc. #30,765-3, CAS #7789-77-7) to the homogeneous solution following endothermic dissolution of the calcium nitrate salt. The DCPD was present both as suspended solids and as precipitated material (no agitation used). Warming of the sample to >25° C. initiated an exothermic reaction as described in Example 1, resulting in the formation of a white, pasty solid. Heat treatment and X-ray diffraction of this solid were conducted as described in Example 1. Following heat treatment in air at 500° C. for 1 hour, XRD indicated the solid to be composed of whitlockite as the primary phase along with calcium pyrophosphate (Ca2P2O7) as the secondary phase.

Quelle

DOI: 10.6084/m9.figshare.5104873.v1Patent: US06458162B1uspto-grants-2002_10