Cradle to Consumer
Identity ID
022daee2-2c03-4ad3-8a49-b03ddfcda4ca
Materials
Associated ID
5902c25e-174d-486a-82ea-9d97a693c81a
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. Ammonium sulfide is widely used in chemical industry, printing and dyeing, leather, pharmaceutical intermediate synthesis and other fields; ammonium sulfide is modeled as a pure substance, and when modeling this substance the user needs to add a solvent of their choice in the model; this dataset includes the main raw and auxiliary materials, energy and air emissions of the production process, while 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 synthesis reaction, cooling, buffer storage, cyclic absorption and finished product filling and other process steps.
Activity Description
The production activities of this product include synthesis reaction, cooling, buffer storage, recycling absorption and finished product canning.
Process Description
The chemical formula of ammonium sulfide (NH4)2S, CAS number 12135-76-1, is usually a colorless to light yellow liquid (industrial products are mostly aqueous solutions), has a strong smell of hydrogen sulfide, and is easily volatile. Easily soluble in water, the aqueous solution is strongly alkaline, insoluble in organic solvents such as ether; chemically unstable, easily decomposes in the air, releasing ammonia and hydrogen sulfide gas, will accelerate decomposition when heated or exposed to acid, and can react with a variety of metal salt solutions to form corresponding sulfide precipitation. Industrially, it is mainly used in the chemical industry (as a reducing agent for organic synthesis, separation and purification of metal ions), the printing and dyeing industry (as a dyeing auxiliary); it is also used in tanning processes (as a depilatory agent), pharmaceutical intermediate synthesis, and as an analytical chemical reagent to detect the presence and content of metal ions.
Time period
2018
2026
Geography
China,Zhejiang
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The synthesis method is the mainstream technology for ammonium sulfide production. It is produced through the neutralization reaction of hydrogen sulfide and ammonia water. The process is simple and the product concentration is controllable. It accounts for more than 90% of the domestic ammonium sulfide market. This data set represents this mainstream technology: ammonia and hydrogen sulfide are fed into the reaction tower in proportion, stirred to carry out the synthesis reaction, and the temperature is controlled to 20-30°C by circulating water to inhibit the decomposition reaction; the reaction liquid is filtered and impurities are removed after buffering and standing, and the filtrate enters the refining tower for purification; after the purification, the concentration of the solution is adjusted to obtain the finished product. The core chemical reaction equation involved is mainly: H2S + 2NH3 → (NH4)2S