Cradle to Consumer
Identity ID
7d635c4e-e56c-43b0-917c-e269c6ae4dc6
Materials
Associated ID
12cbd95a-5a0e-430a-810e-0cdeb75cd349
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 consumption end, and the transport service is calculated based on the transport situation of the product in the region. Polyferric sulfate is widely used in the treatment of drinking water, industrial wastewater and municipal wastewater, as well as sludge dewatering and other fields; polyferric sulfate is modeled as a pure substance, and when modeling this substance the user needs to add a solvent of their choice in the model; the main raw material comes from hydrated ferrous sulfate, a by-product of titanium dioxide production by the sulfate process; this dataset includes the main raw and auxiliary materials, energy, waste and air emissions of the production process, and infrastructure such as production equipment manufacturing and plant construction is not included within the dataset boundary; the data inventory is formed by merging data from multiple sources; the production activity of this product includes dissolution, oxidative polymerization, pressure filtration, dewatering and drying and other process steps.
Activity Description
The production activities of this product include dissolution, oxidative polymerization, filter pressing, dehydration and drying and other processes.
Process Description
Polyferric sulfate (PFS for short) is an alkaline sulfate, and its industrial product is a reddish-brown viscous liquid or light yellow powder. Easily soluble in water, the aqueous solution is acidic, has stable chemical properties, and has strong adsorption and flocculation capabilities. It can absorb impurities in water through colloidal particles and precipitate them, and has good removal effects on suspended solids, organic matter, sulfide, phosphorus, heavy metals, etc. in water. This product is non-toxic, less corrosive and will not cause secondary pollution after use. It is mainly used in the field of water treatment in industry. As a water purification agent, it is widely used in the purification treatment of domestic drinking water, industrial wastewater (such as printing and dyeing wastewater, electroplating wastewater), and municipal sewage. It can also be used in the papermaking industry as a sizing agent to improve the strength and water resistance of paper. It is also used as a conditioning agent in the sludge dehydration process to improve the sludge dehydration efficiency.
Time period
2016
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The ferrous sulfate oxidation method is the mainstream technology for the preparation of polymeric ferric sulfate. Polymer flocculants are produced through catalytic oxidation of ferrous sulfate. The process is mature and cost-controllable, accounting for more than 90% of the domestic polymeric ferric sulfate market. This data set represents this mainstream technology: using ferrous sulfate heptahydrate and titanium dioxide waste acid (sulfuric acid), which are by-products from the sulfuric acid method of titanium dioxide production, as raw materials, using liquid oxygen as the oxidant and sodium nitrite as the catalyst, and synthesizing polymeric ferric sulfate by varying the reaction temperature and time. The raw materials are dissolved and mixed, then undergo oxidative polymerization to produce polymeric ferric sulfate, which is further processed through pressure filtration, dehydration, and drying to obtain solid polymeric ferric sulfate. The main chemical reaction equation is: FeSO4 + O2 + H2SO4 → [Fe2(OH)n(SO4)3-n/2]m.