Cradle to Gate
Identity ID
f965d4b3-e30e-4034-8d68-00a43a89eddb
Materials
Associated ID
742ef5b0-739f-4459-aa0d-b0587a6df700
Included activities starts
Included activities ends
Description
Chlorine dioxide is widely used in fields such as the disinfection and deodorization of drinking water, food processing, medical and health care, public environments and industrial circulating water systems. Chlorine dioxide is modelled as a pure substance; when modelling this substance, the user is required to add a solvent of their choice in the model. Based on stoichiometric calculation and literature data, the dataset includes the main raw and auxiliary materials, energy, water-body and atmospheric emissions of the production process, 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 solution preparation, feeding and mixing, reaction and other process steps.
Activity Description
The production activities of this product include solution preparation, feeding mixing, reaction and other processes.
Process Description
Chlorine dioxide has the chemical formula ClO2 and CAS number 10049-04-4. At normal temperature and pressure, it is a yellow-green to orange-yellow gas with a pungent chlorine-like odor. It is readily soluble in water and forms a yellow-green solution. Chlorine dioxide is a strong oxidizing agent capable of inactivating bacteria, viruses, and other microorganisms. In water treatment, it generally forms smaller amounts of certain chlorinated organic by-products than direct chlorination, but inorganic by-products such as chlorite and chlorate may still form. Heat and light accelerate the decomposition of chlorine dioxide gas. Pure chlorine dioxide, or mixtures containing more than approximately 10% by volume in air, present an explosion hazard. It is therefore normally generated on site and used as a dilute solution; any stored solution should be kept cool and protected from light. Chlorine dioxide is widely used for disinfection and deodorization in drinking-water treatment, food processing, healthcare, public environments, and industrial circulating-water systems.
Time period
2016
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The sodium chlorite-hydrochloric acid method is the mainstream chemical process for producing chlorine dioxide, with mild reaction conditions and stable yields, accounting for more than 70% of the application scenarios in small and medium-sized chlorine dioxide generators. This dataset represents this mainstream technology: first, dissolve solid sodium chlorite in pure water to prepare a sodium chlorite solution; then, add the sodium chlorite solution and hydrochloric acid solution dropwise into the reactor via a metering tank, and allow them to react at room temperature under sealed conditions to finally produce chlorine dioxide. The main chemical reaction equation involved is: 5NaClO2 + 4HCl → 4ClO2↑ + 5NaCl + 2H2O.