Cradle to Gate
Identity ID
012b8265-7be8-4806-9686-484a5b53f2d4
Materials
Associated ID
2c4c2d47-cfe5-4ba7-a970-91490989778b
Included activities starts
Included activities ends
Description
Dipotassium hydrogen phosphate is widely used in fields such as water treatment, food processing, agricultural fertilisers, pharmaceuticals and biochemical culture media; Dipotassium hydrogen 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 neutralisation, filtration, drying, cooling, and crushing and screening. Sulfur is a by-product of this production process.
Activity Description
Neutralization, filtration, drying, cooling, crushing and screening
Process Description
Dipotassium hydrogen phosphate has the chemical formula K2HPO4 and CAS number 7758-11-4. It typically occurs as a white hygroscopic solid, is odorless, and has a density of approximately 2.45 g/cm³. It is readily soluble in water, and its aqueous solution is weakly alkaline. It has a melting point of approximately 450°C and is chemically stable under normal ambient conditions. Dipotassium hydrogen phosphate is mainly used as a buffer, food additive, and source of phosphorus and potassium in fertilizers. It is also used in culture media and other chemical and pharmaceutical products.
Time period
2017
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The neutralization method is the mainstream technology for the production of food-grade dipotassium hydrogen phosphate. It is produced through the precise neutralization reaction of phosphoric acid and potassium hydroxide. The purity of the product complies with relevant standards for food additives. It accounts for more than 95% of the domestic food-grade dipotassium hydrogen phosphate market. This data set represents this mainstream technology: a neutralization reaction between phosphoric acid and potassium hydroxide produces dipotassium hydrogen phosphate, which is filtered to remove impurities and then dried. Finally, the finished product is obtained by cooling, crushing, and screening. The main chemical reaction formula involved: 2KOH + H3PO4 → K2HPO4 + 2H2O.