Experimental Study of the Purification of an Industrial Fertilizer (Mono-Ammonium Phosphate) toLarger Scale Using an Experimental Design

NH4H2PO4, mono-ammonium phosphate (MAP) has become a leading phosphate fertilizer product worldwide. Ammonium phosphates are produced by reactions of ammonia and phosphoric acid resulting in the formation of the mono-basic salt. A batch crystallizer in a pilot setup was utilized to produce pure MAP crystals using a fractional experimental design 25-2. The supersaturation level not only influences the growth rate but the crystal shape as well.