Cradle to Gate
Identity ID
dd917e2f-e94f-4a30-ba5a-2bd94fe85a8a
Materials
Associated ID
8f9ebf3f-687c-43bb-83e7-9b7e21040ab8
Included activities starts
Included activities ends
Description
Light calcium carbonate is widely used in fields such as food additives and nutritional fortifiers. Calcium carbonate is modeled as a pure substance; when modeling this substance, the user needs to add a solvent of their choice in the model. This dataset includes the main raw and auxiliary materials, energy, waste, and atmospheric emissions of the production process; infrastructure such as the manufacturing of production equipment and the construction of plants is not included within the dataset boundary. The data inventory is formed by merging data from multiple sources. The production activity of this product includes process steps such as limestone calcination, water slaking, carbonation precipitation, and dewatering and drying.
Activity Description
The production of this product involves processes such as limestone calcination, hydration, carbonation precipitation, dehydration, and drying.
Process Description
The chemical formula of calcium carbonate is CaCO3, and its CAS number is 471-34-1. Calcium carbonate is a common inorganic salt. According to different production methods, calcium carbonate can be divided into heavy calcium carbonate, light calcium carbonate and other types. Among them, light calcium carbonate, also known as precipitated calcium carbonate, is made by calcining, digesting, carbonizing and dehydrating limestone. It can be used as food additives and nutritional fortifiers to supplement calcium. It is also an important raw material and additive in the chemical industry, materials industry, construction industry, textile industry and ink manufacturing industry.
Time period
2020
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The carbonation method is a classic mainstream technology for producing light calcium carbonate, featuring strong process adaptability and controllable crystal form, accounting for over 90% of the domestic light calcium carbonate market. This dataset represents this mainstream technology: limestone and other raw materials are calcined to produce lime (the main component of which is calcium oxide) and carbon dioxide; water is added to slake the lime to produce lime milk (the main component of which is calcium hydroxide); then purified carbon dioxide is introduced for carbonation to produce calcium carbonate precipitate, which is finally obtained through dehydration and drying. The main chemical reaction equations involved are: CaO + H2O = Ca(OH)2; Ca(OH)2 + CO2 = CaCO3↓ + H2O.