Abstract
Different physical chemical methods were used to study the thermochemical processes in a system involving a natural phosphate and complex acid salts of ammonium sulphate.
The products of decomposition of the double ammonium salt and the products of their interactions with the phosphate were identified. The formation of ammonium and calcium polyphosphates and the disproportionation of P3O 5−10 and P2O 4−7 to PO 3−4 and PO −3 were found to depend on the circumstances of the thermal interactions.
Zusammenfassung
Verschiedene physikalische Methoden wurden zur Untersuchung thermochemischer Prozesse in einem System mit natürlichen Phosphaten und komplexen sauren Salzen von Ammoniumsulfat angewendet.
Die Produkte der Zersetzung der Doppelammoniumsalze und die Produkte ihrer Wechselwirkung mit den Phosphaten wurden identifiziert.
Man fand die Bildung von Ammonium- und Calciumphosphaten und die Disproportionierung von P3O 5−10 und P2O 4−7 zu PO 3−4 und PO −3 , je nach den Umständen der thermischen Wechselwirkung.
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Arasheva, M., Dombalov, I. Investigations of the thermal stability and phase transformations in the system marocco phosphorite—(NH4)3H(SO4)2.NH4HSO4 . Journal of Thermal Analysis 43, 359–368 (1995). https://doi.org/10.1007/BF02636007
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DOI: https://doi.org/10.1007/BF02636007