Chemical reactions in the phosphorite-sulfuric acid-urea-water system in relation to process safety and product quality. Part 2. System CO(NH2)(2)-H2SO4-H3PO4-CaSO4-Ca(H2PO4)(2)-CaHPO4-H2O

Schab S; Biskupski A; Gorecki H; Borowik M; Rusek P; Malinowski P

Przemysl Chemiczny, Vol.95, No.9, 1721-1728, 2016

DOI10.15199/62.2016.9.13 Export Citation

Chemical reactions in the phosphorite-sulfuric acid-urea-water system in relation to process safety and product quality. Part 2. System CO(NH2)(2)-H2SO4-H3PO4-CaSO4-Ca(H2PO4)(2)-CaHPO4-H2O

Schab S, Biskupski A, Gorecki H, Borowik M, Rusek P, Malinowski P

The title system used for manufg. urea superphosphate fertilizers was studied for reaction of H3PO4 with Ca(H2PO4)(2) and CaHPO4 and with urea-CaSO4 and urea-H3PO4 adducts. The presence of CaSO4 resulted in increasing the thermal stability of urea, while the presence of H3PO4 resulted in decreasing of its stability.