Cradle to Consumer
Identity ID
655aadb5-208b-45ab-bc99-a03f0cddeb82
Materials
Associated ID
abd7db55-7be7-4eaf-8a07-74fd6b5a4d0b
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. Bleaching powder is widely used in fields such as drinking water disinfection, swimming pool water treatment, sewage treatment, food processing bleaching, and paper and textile bleaching. Bleaching powder 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 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 mixing reaction, solid-liquid separation, drying and cooling, and screening.
Activity Description
The production activities of this product include mixing reaction, solid-liquid separation, drying and cooling, screening and other processes.
Process Description
The main ingredients of Grade I bleaching powder are calcium hypochlorite and calcium chloride, with an effective chlorine content of ≥65%. It is a light yellow solid powder or granule, odorless or with a slight chlorine smell. When exposed to water, it slowly releases hypochlorous acid, exhibiting strong oxidizing, disinfecting, and bleaching capabilities. Grade I bleaching powder has good stability, is easy to operate, is readily soluble in water, and offers remarkable sterilizing and bleaching effects. It is widely used for disinfection and sterilization (such as water disinfection and environmental disinfection), bleaching processes (for fabrics, pulp, etc.), water treatment (removing reducing pollutants and odors in water), food processing industry (disinfection of equipment and environment), as an oxidant for chemical synthesis, decolorization and deodorization in wastewater treatment, and for water disinfection and epidemic prevention in aquaculture.
Time period
2019
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The calcium method is the mainstream technology for the production of bleaching powder. It is produced through the reaction of chlorine gas and milk of lime. The process is simple and easy to industrialize. Class I products account for more than 60% of the high-end bleaching powder market segment due to their high available chlorine content. This dataset represents this mainstream technology: calcium hydroxide and chlorine are fully mixed and reacted in the reactor, and the temperature is controlled by circulating cooling water to reduce the occurrence of side reactions; the suspension generated by the reaction is subjected to solid-liquid separation and washing to obtain a crude product; the crude product is dried, cooled, and screened to obtain the finished grade I bleaching powder. The chemical reaction equation involved is mainly: 2Ca(OH)2 + 2Cl2 → Ca(OCl)2 + CaCl2 + 2H2O.