Recent Developments in the Production and Use of Monoammonium Phosphate
Balay, Hubert L.
Salladay, David G.
This document provides an overview of the recent developments in the production and utilization of monoammonium phosphate (MAP). The versatility of MAP has contributed to its growing popularity as a granular bulk blend material and a replacement for superphosphates in granulation plants. The low delivery cost of MAP compared to other ammonium phosphate products has further increased its appeal. The document explores various grades of MAP being produced and the processes involved in its production. The use of MAP in bulk blending is examined, highlighting its advantage over diammonium phosphate in achieving a wide range of blend ratios without the need for additional phosphate materials. The document discusses the need for additional nitrogen when using MAP and the availability of local nitrogen suppliers. Formulas for common grades blended from MAP, and diammonium phosphate are provided. Furthermore, the document explores the use of powdered MAP in granulation plants, particularly as a replacement for normal superphosphate and triple superphosphate. The cost-effectiveness, convenience in shipping, and compatibility with existing equipment make MAP a preferred choice in granulating high nitrogen grades. Operational experiences from a plant using MAP in the granulation process are shared, including challenges encountered and successful formulations. The document also discusses the use of MAP in fluid fertilizers and its contribution to suspension fertilizers. Factors such as impurity content, mole ratios, and the need for high-intensity mixing equipment are considered. Additionally, the production of ammonium polyphosphate from wet-process phosphoric acid is addressed, highlighting its storage and handling characteristics. Collapse
Production, Suspension fertilizers