Given the density of phosphoric acid and the contents of phosphorus pentoxide, how can the maximum nutrient content of diammonium phosphate produced be calculated or estimated?
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It is known that the density of concentrated phosphoric acid is 1.649 g/m3, with P2O5 content of 48.68% and a solid content of 0.78%； MgO: 1.28%; Fe2O3: 2.34%; Al2O3: 1.22%. Is it possible to calculate or estimate the maximum content of P2O5 in the diammonium phosphate product that can be produced? Or it can be asked this way: what type of concentrated phosphoric acid can be used to produce diammonium phosphate with an effective phosphorus content of 46%?
It can be calculated based on the theoretical values from the chemical reaction equation
Based on the contents of MgO: 1.28%; Fe2O3: 2.34%; Al2O3: 1.22%, the proportion of P2O5 can be calculated, and the remaining amount can be used as an effective phosphorus source for DAP
I suggest you buy a book on phosphorus chemistry; it contains detailed steps that are all based on chemical equations.
The production of diammonium (MgO+Fe2O3+Al2O3)/P2O5 is generally around 8%; the impurity ratio in the case mentioned here is a bit high