Production of suspension fertilizers from orthophorphoric acid

摘要

An improved process for the production of concentrated, high-grade, nitrogen-phosphate (N-P2O5) base suspension fertilizer from wet-process or other phosphoric acids and ammonia. The process involves addition of small proportions of fluosilicic acid during preparation of the suspension to cause modification of monoammonium phosphate crystals to shapes and sizes that do not settle during vibration such as occurs during shipment.