Cradle to Gate
Identity ID
a64fecc6-4281-479b-a0c8-29037071f003
Materials
Associated ID
c98e7de9-97f5-418b-9861-999e0bc605be
Included activities starts
Included activities ends
Description
Barium chloride is mainly used in metal heat treatment, the manufacture of barium salts and electronic instruments; it is also used as a heat-treatment agent in machining, for the determination of sulfates and selenates, chromatographic analysis, the spot determination of platinum, water softening and other fields; The dataset includes the main raw and auxiliary materials, energy, atmospheric emissions, wastewater and solid waste of the production process, in which the preliminary treatment of wastewater in the utility/auxiliary processes and the waste-gas treatment process are included within the dataset boundary, 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 pulping, acidification, evaporation and concentration, filtration, crystallization, heating and dissolution, filtration, crystallization, dehydration, pressure filtration and impurity removal and other processes.
Activity Description
The production activities of this product include pulping, acidification, evaporation and concentration, filtration, crystallization, heating and dissolving, filtration, crystallization, dehydration, filter press and impurity removal, etc.
Process Description
Barium chloride dihydrate has the chemical formula BaCl2·2H2O and CAS number 10326-27-9. It is a white crystalline powder with a density of 3.856 g/cm3. Upon heating, it loses its water of crystallization; its apparent melting point is approximately 113°C, and it decomposes upon further heating. It is soluble in water, insoluble in acetone and ethanol, and slightly soluble in acetic acid and sulfuric acid. It is mainly used in metal heat treatment, barium salt manufacturing, and electronic instruments. It is also used as a heat-treatment agent in mechanical processing, for determining sulfates and selenates, in chromatographic and spot-test analyses for platinum, and for water softening.
Time period
2019
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Barium carbonate is pulped and then acidified with hydrochloric acid to generate barium chloride. The aqueous solution containing acid-insoluble matter is filtered using a plate and frame filter press. The filtrate is concentrated and filtered again for crystallization. The mother liquor is circulated. After crystallization and drying, primary barium chloride is obtained. Condensed water and refined mother liquor are added to dissolve the primary barium chloride. The solution is then filtered for crystallization and centrifugally dehydrated to obtain barium chloride dihydrate. The core reaction chemical equation of the acid hydrolysis method is: BaCO3+2HCl+H2O=BaCl2·2H2O+CO2↑.