Cradle to Gate
Identity ID
c3b07740-f647-4e5c-8c5e-3db5dd8ac8d1
Materials
Associated ID
87793fb8-9b32-4dcc-8ce1-20ccd69449e8
Included activities starts
Included activities ends
Description
Sodium cyanate is used as a raw material for producing amobarbital in organic synthesis, as a heat-treatment agent for steel in the metallurgical industry, as a herbicide in the pesticide industry, and is also a raw material for the pharmaceutical industry, among other fields; The dataset includes 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 utility/auxiliary processes and the waste-gas treatment process are included within the dataset boundary, 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 feeding, negative-pressure reaction, crushing, purification, crushing, tail-gas recovery, crystallization, centrifugation, drying, crystallization, settling and other processes. Ammonium sulfate is a by-product of this production process.
Activity Description
The production activities of this product include feeding, negative pressure reaction, crushing, purification, crushing, exhaust gas recovery, crystallization, centrifugation, drying, crystallization, sedimentation and other processes.
Process Description
Sodium cyanate, chemical formula: NaCNO, CAS number: 917-61-3. White needle-shaped crystals or powder, relative density 1.937 g/cm³, melting point 550°C, easily soluble in water, slightly soluble in liquid ammonia and organic solvents such as benzene, ethanol, ether, etc. It is extremely stable in the dry state and readily hydrolyzes in hot water to produce urea, sodium carbonate, and ammonium carbonate. Sodium cyanate is used as a raw material for the production of meprobamate in organic synthesis, as a heat treatment agent for steel in the metallurgical industry, as a herbicide in the pesticide industry, and as a raw material in the pharmaceutical industry.
Time period
2024
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Mix dry sodium carbonate and urea evenly in a uniform proportion; feed the mixture into a rotary kiln or reaction kettle and allow it to react continuously at a high temperature of 300–400°C. The temperature and heating rate must be controlled during the reaction, and the generated gases such as NH₃ and CO₂ should be discharged promptly. After cooling, the reaction product is crushed and screened to remove small amounts of unreacted raw material impurities. If necessary, further purification is carried out by washing and drying, finally obtaining the sodium cyanate product. The core reaction chemical equation of the urea method is: Na2CO3 + 2CO(NH2)2 = 2NaCNO + CO2 + 2NH3 + H2O.