Cradle to Gate
Identity ID
2d175747-af19-4e28-a0ca-1cbc3dd48aa2
Materials
Associated ID
750549b8-b370-4b00-bcd3-03624851a00d
Included activities starts
Included activities ends
Description
Industrial polyaluminium chloride is mainly used in fields such as industrial water supply, wastewater treatment, and the decolorization and dephosphorization of urban sewage; the dataset includes the main raw and auxiliary materials, energy, atmospheric emissions, wastewater and solid waste of the production process, in which the wastewater and waste-gas treatment processes are included within the dataset scope, while infrastructure such as the manufacture of production equipment and plant construction 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 feeding, dilution, heating, pH adjustment, polymerization reaction, plate-and-frame pressure filtration, settling, drying and other processes. Among them, the drying process comprehensively considers both spray drying and drum drying.
Activity Description
The production activities of this product include feeding, dilution, temperature raising, pH adjustment, polymerization reaction, plate and frame filter press, sedimentation, drying and other processes. The drying process comprehensively considers two methods: spray drying and drum drying.
Process Description
Polyaluminum chloride (PAC), CAS number 1327-41-9, is an inorganic polymeric coagulant supplied as a yellow or pale-yellow powder. It dissolves readily in water and forms highly charged polymeric cations. Its hydrolysis products efficiently neutralize the negative charge of colloidal particles and form large, dense flocs through adsorption and bridging, significantly improving water-purification efficiency. PAC is widely used in drinking-water treatment, industrial wastewater treatment, and the decolorization and phosphorus removal of municipal wastewater. It is also used as a sizing agent in papermaking and in the manufacture of antiperspirants.
Time period
2016
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
After the bauxite and hydrochloric acid are diluted in the reaction tank, the temperature of the reaction tank is raised to 50°C and then the heating is stopped and the reaction occurs on its own. The temperature in the tank will gradually increase and is artificially controlled at 100-105°C. After reacting for a period of time, add water to adjust the Baume value to 30, then add calcium aluminate powder, control the temperature at 80-90°C for a period of time, and then polymerize into a polyaluminum chloride liquid. Then add sodium hydroxide to neutralize and stir until the reaction is completed.