Cradle to Consumer
Identity ID
0b469011-c652-4e09-b5d4-7349eb2b8e00
Materials
Associated ID
014df656-9267-43b1-8d6a-1b2d7f33cec5
Included activities starts
Included activities ends
Description
This dataset is a market dataset, representing the consumption market of the region; the dataset includes the transport of the product from the gate to the consumer end, and the transport service is calculated according to the transport situation of this product in this region. Cuprous bromide is commonly used in colour photography and batteries, and is also used as a catalyst for organic reactions and as a nylon stabiliser; Cuprous bromide 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, atmospheric emissions, wastewater and solid waste of the production process, in which the preliminary treatment of wastewater in the auxiliary units and the waste gas treatment process are included within the dataset boundary, 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 dissolution, centrifugation, washing, centrifugation and drying.
Activity Description
The production activities of this product include dissolution, centrifugation, cleaning, centrifugation, drying and other processes.
Process Description
The chemical formula of cuprous bromide is CuBr, CAS number is 7787-70-4. It is white crystal or crystalline powder. It gradually turns light green when exposed to the air. It is soluble in hydrobromic acid, hydrochloric acid, nitric acid and ammonia, slightly soluble in water, and insoluble in organic solvents such as ethanol, acetone, acetic acid and boiling concentrated sulfuric acid. It decomposes in hot water and is easily decomposed when exposed to light. It is often used in color photography and batteries, and is also used as an organic reaction catalyst and nylon stabilizer.
Time period
2020
2026
Geography
China,Ningxia Hui Autonomous Region
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The preparation of cuprous bromide by the copper sulfate reduction method is one of the mainstream routes for domestic small and medium-sized chemical companies to produce cuprous bromide, with a market share of approximately 65%–75%. This dataset represents this mainstream technology: when producing cuprous bromide, copper sulfate pentahydrate and sodium bromide are first dissolved in water at a molar ratio of 1:1.008, the temperature is raised to 95°C with stirring, and sodium thiosulfate is added until the blue color completely fades. After the solution is cooled and stratified, the first centrifugation removes water at around 80°C. The crude product is washed with ethanol and then subjected to a second centrifugation. The centrifuged product is vacuum dried to obtain the final product. The wastewater from the first centrifugation is sent to a three-effect evaporator for desalination. The waste ethanol generated by ethanol washing is sent to a qualified treatment facility, and the drying exhaust gas is drawn into a water-ring vacuum pump. The core reaction chemical equation of this process is: 2CuSO4·5H2O + 2NaBr + Na2S2O3 + 2H2O → 2CuBr + 2Na2SO4 + 2H2SO4 + 10H2O.