Cradle to Consumer
Identity ID
444c7f3d-0fa0-4d7a-a418-0b2a1517229e
Materials
Associated ID
3ccebe06-9de5-4013-8324-d4fb7d8d5a83
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. Silicon tetrachloride is widely used in the manufacture of fields such as semiconductors, organosilicon, optical fibres, catalyst carriers, aerogels and precision ceramics; Silicon tetrachloride 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 hydrogen chloride synthesis, hydrogen chloride drying, silicon powder drying, silicon tetrachloride synthesis, gas-solid separation, pressure swing adsorption and purification.
Activity Description
The production activities of this product include hydrogen chloride synthesis, hydrogen chloride drying, silicon powder drying, silicon tetrachloride synthesis, gas-solid separation, pressure swing adsorption, purification and other processes.
Process Description
The chemical formula of silicon tetrachloride is SiCl4, CAS number 10026-04-7. It is a colorless and transparent liquid under normal temperature and pressure. It has a pungent and pungent smell, is easily volatile, and has a boiling point of about 57.6°C. It is easily soluble in organic solvents such as benzene, ether, carbon tetrachloride, etc., and will undergo a violent hydrolysis reaction when meeting water to generate silicic acid and hydrogen chloride gas, while releasing a large amount of heat. It is chemically active and corrosive, has good stability at room temperature, can react with metals, hydrogen, etc. at high temperatures, and can participate in the synthesis of organosilicon compounds. Industrially, it is mainly used in the fields of semiconductors and electronics (as the core raw material for the preparation of high-purity silicon and polycrystalline silicon), and silicone synthesis (key intermediates for the production of silicone products such as silane, silicone oil, and silicone rubber). It is also used in optical fiber manufacturing, catalyst carriers, and the preparation of new materials such as silica aerogels and precision ceramics.
Time period
2022
2026
Geography
China,Qinghai
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
This technology is silicon powder-hydrogen chloride synthesis of trichlorosilane to co-produce silicon tetrachloride, which is a modified Siemens route for precursor production. The cost is low: chlorine and hydrogen react to generate hydrogen chloride. The synthesized hydrogen chloride enters the furnace from the bottom of the trichlorosilane synthesis furnace. The electrically conductive wire initiates a reaction, and the silicon powder reacts with hydrogen chloride to generate a mixed gas of trichlorosilane and silicon tetrachloride. The generated hydrogen is reused for the synthesis of hydrogen chloride. After the reaction, trichlorosilane and silicon tetrachloride are obtained through gas-solid separation, pressure swing adsorption, purification and other operations. The core reaction chemical equation of this process is: Si + 3HCl → SiHCl3 + H2; Si + 4HCl → SiCl4 + 2H2.