Hydrogen Peroxide → Tricalcium Phosphate

HRID 886651

Reaktionsgleichung

Reaktionsgleichung von HRID 886651
[Ca:1].O.O.O.O.[N+]([O-])([O-])=[O:7].[Ca+2].[N+]([O-])([O-])=O.[P].[P:16](=[O:20])([OH:19])([OH:18])[OH:17].OO>C(O)C.O>[P:16]([O-:20])([O-:19])([O-:18])=[O:17].[Ca+2:1].[Ca+2:1].[Ca+2:1].[P:16]([O-:20])([O-:19])([O-:18])=[O:17].[O-2:7].[Ca+2:1]

Komponenten

9

Edukt 5

HCID 784Hydrogen PeroxideHCID 1004Phosphoric AcidHCID 5460341Calcium2×HCID 5462309Phosphorus2×HCID 16211656Calcium nitrate tetrahydrate

Produkt 2

HCID 24456Tricalcium PhosphateHCID 6850728Calciumoxide

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 702EthanolLösungsmittelHCID 962WaterLösungsmittel

Versuchsvorschrift

A Calcium solution was made by dissolving 115.05 g of Calcium Nitrate tetra hydrate in 250 ml of ethanol. A phosphorus solution was made by adding 20 ml of 85% w/w aqueous Phosphoric acid to 50 ml of 30% w/w aqueous Hydrogen peroxide. The resulting solutions were mixed, adding the Calcium solution to the Phosphorus slowly with constant vigorous stirring. No precipitates were formed during or on the immediate mixing of the two solutions but subsequent to achieving the correct Ca/P ratio (complete mixing) turbidity did develop, the composition containing dispersed colloidal gelatinous material. This composition was feed to the inner venturi of a coaxial combustion nozzle. Air was supplied in the outer venturi and a pilot flame provided the means to ignite the atomised composition. The combustion products were directed into a stainless steel vessel containing water. After burning a powdered material was recovered form the water dried overnight at 100° C. and submitted for XRD (X-Ray Diffraction) analysis. The resulting XRD pattern is shown in FIG. 4. As indicated the burning of the ethanol/aqueous solution having a molar Calcium to Phosphorous ratio of 1.67 resulted in the formation of crystalline HAP without further high temperature processing Furthermore none of the peaks characteristic of TriCalcium Phosphate (TCP) and Calcium Oxide (CaO) are observed in the diffraction pattern demonstrating the advantage of the hydrogen peroxide.

Aufarbeitung

  1. additionThe resulting solutions were mixed
  2. customNo precipitates were formed during or on the
  3. additionimmediate mixing of the two solutions
  4. additionthe composition containing
  5. additiondispersed colloidal gelatinous material
  6. temperaturea pilot flame
  7. customprovided the means
  8. customThe combustion products were directed into a stainless steel vessel
  9. customwas recovered form the water
  10. customdried overnight at 100° C.

Quellen und Nachweise

ORD-Eintrag
ord-e5c2e2fc7f9642d7bf9ad98b6d372ccf
Quelldatensatz
uspto-grants-2012_08
Patentnummer
US08246924B2

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