Production of suspension fertilizers from wet-process orthophosphoric acids

摘要: A process for preparing concentrated, high-grade, nitrogen-phosphate (N--P 2 O 5 ) base suspension fertilizer from wet-process or other impure orthophosphoric acids. The involves a new procedure the direct ammoniation of acid in stages production fluid, high-analysis, N--P with good physical properties. contains novel method prevention settling crystals during vibration, such as that which occurs shipment. Settling is avoided by producing small, thin diammonium phosphate through control N:P ratio and temperature second third stages.