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Technology Profile: Diammonium Phosphate Production

By Intratec Solutions |

This column is based on “Diammonium Phosphate Production – Cost Analysis,” a report published by Intratec. It can be found at: www.intratec.us/analysis/diammonium-phosphate-production-cost. Diammonium phosphate (DAP) ranks among the most important phosphate-based fertilizers, not only for its high nutrient content, but also for its excellent physical properties, such as high solubility and alkaline pH around the dissolving granules. DAP is commonly formulated in a controlled reaction of phosphoric acid with ammonia. It is typically produced in both granular form, to be used as fertilizer either directly or blended with other types of fertilizers, and in nongranular form, to be used in liquid fertilizers. The process The following paragraphs describe a process for diammonium phosphate production from phosphoric acid and ammonia via an ammoniation-granulation process using a pipe reactor. Figure 1 presents a simplified flow diagram of the process. Figure 1. The process description shows a production process for diammonium phosphate[/caption] Ammoniation-granulation. Initially, phosphoric acid, gaseous ammonia, and scrubber liquor are directed to the pre-neutralizer reactor. The main goal of the pre-neutralization is to…
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