反应 #973832

反应方程式

water

Calcium Nitrate tetra hydrate

phosphorous pentoxide

→

Calcium Oxide

TriCalcium Phosphate

溶剂

ethanol

ethanol

反应条件

后处理

1. 1
   workup.ADDITIONThe resulting solutions were mixed on complete dissolution of the salts
2. 2
   其他The flue gases were directed into a stainless steel vessel
3. 3
   其他was recovered form the water
4. 4
   其他dried overnight at 100° C.

实验过程

117.56 g of Calcium Nitrate tetra hydrate was dissolved in 250 ml of ethanol similarly 21.28 g of phosphorous pentoxide was dissolved in 250 ml of ethanol. The resulting solutions were mixed on complete dissolution of the salts and fed to an oil burner for combustion. The flue gases 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 given in FIG. 3 and can be compared with that of the NIST standard HAP shown in FIG. 2. As indicated the burning of the ethanol solution having a molar Calcium to Phosphorous ratio of 1.67 resulted in the formation of HAP without further high temperature processing but peaks characteristic of TriCalcium Phosphate (TCP) and Calcium Oxide (CaO) are observed in the diffraction pattern.

来源