Cradle to Gate
Identity ID
c937a243-c0c7-4cea-abbc-801a838e253d
Materials
Associated ID
8f5e9dbb-fe72-4295-a64b-62fcd8c827de
Included activities starts
Included activities ends
Description
Monoammonium phosphate is widely used in fields such as agricultural fertilisers, industrial flame retardants, pharmaceutical intermediates, food additives and chemical batteries; Monoammonium phosphate is modelled as a pure substance; when modelling this substance the user needs to add a solvent of their choice in the model; the dataset contains the main raw and auxiliary materials, energy, waste and atmospheric emissions of the production process, and infrastructure such as the manufacture of production equipment and the construction of plant buildings is not included within the dataset boundary; the data inventory is formed by merging data from multiple sources; the production activities of this product include raw material mixing reaction, slurry concentration, crystallisation, centrifugal separation, drying and cooling, and screening.
Activity Description
The production activities of this product include raw material mixing reaction, slurry concentration, crystallization, centrifugal separation, drying, cooling and screening.
Process Description
Monoammonium phosphate has the chemical formula NH4H2PO4 and CAS number 7722-76-1. It typically occurs as white or colorless transparent crystals and is also available as a granular industrial product. It is odorless and has a slightly acidic taste. It is readily soluble in water and insoluble in organic solvents such as ethanol and acetone. Its aqueous solution is weakly acidic, and the substance is stable at room temperature. It melts at approximately 197°C with concurrent decomposition; further heating releases ammonia and water and forms condensed phosphates such as pyrophosphates and metaphosphates. Monoammonium phosphate is widely used as a concentrated fertilizer, particularly for phosphorus-demanding crops and phosphorus-deficient soils. It is also used in flame retardants, pharmaceutical intermediates, fermentation agents, food additives, lithium-ion batteries, nickel-metal hydride batteries, and other chemical power sources.
Time period
2021
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The ammonia neutralization method is used to produce monoammonium phosphate, which currently accounts for more than 85% of the battery-grade monoammonium phosphate market. That is, the dilute phosphoric acid produced by the wet method is directly used as raw material, and ammoniation is carried out in a neutralization tank or a rapid ammoniation evaporator. The neutralized slurry is then evaporated and concentrated to obtain the finished monoammonium phosphate. The main chemical reaction involved is: H3PO4 + NH3 → NH4H2PO4.