Cradle to Consumer
Identity ID
cd502b52-0345-4800-9117-ea9b4eec5356
Materials
Associated ID
13e29108-ef17-4b76-be5f-d76a4e5fff9c
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. Sodium hydride is widely used in fields such as organic synthesis, metal smelting and sodium borohydride synthesis; Sodium hydride 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, soil 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 sodium melting, hydrogenation, and cooling and filtration.
Activity Description
The production operations for this product include feeding, ball milling, hydrolysis, pre-carbonization, carbonization, pyrolysis, plate-and-frame pressure filtration, and drying, among others.
Process Description
The chemical formula of sodium hydride is NaH, CAS No. 7646-69-7. It is usually a white to off-white crystalline powder or lump solid, odorless, and hygroscopic. Insoluble in organic solvents (such as ether and benzene), it reacts violently with water to generate sodium hydroxide and release a large amount of hydrogen gas. The reaction is accompanied by high heat, which may cause hydrogen combustion or even explosion. It is highly reducing and strongly basic, and is often used as a strong base and hydride ion donor in organic reactions. It can react violently with acids, oxidants, halogenated hydrocarbons, etc. It slowly deteriorates in air or moist environments. When heated above 400°C, it decomposes into sodium metal and hydrogen gas. Industrially, it is mainly used in organic synthesis (as a strong base catalyst for condensation and cyclization reactions, or as a reducing agent to prepare organometallic compounds), metal smelting (reducing certain metal oxides to extract metals); it is also used to prepare chemical products such as sodium borohydride.
Time period
2021
2026
Geography
China,Chongqing
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The mainstream technology for the production of sodium hydride is the direct synthesis of sodium metal and hydrogen. The process must be carried out under high temperature and high pressure, resulting in high technical barriers. All domestic enterprises that produce sodium hydride on a large scale adopt this process, and it accounts for nearly 100% of industrial applications. This dataset represents this mainstream technology: using sodium metal and hydrogen as raw materials, the reaction is carried out in an inert solvent, and the sodium hydride product is obtained after sodium melting, hydrogenation, cooling, and filtration. The main chemical reaction involved is: 2Na + H2 → 2NaH.