Intratec Chemical Process Library is the first free online encyclopedia of chemical process technologies. Our Library covers not only processes description themselves, but also the economics surrounding chemicals production, providing real-world knowledge on the production of several chemical commodities. Click here to check all chemicals covered.
In this page you will find free data about Urea, including:
- What is Urea
- How to make Urea
- Urea uses and applications
This page presents brief synopsis of Urea production technology, describing, in a concise way, relevant technical and economic aspects. Each manufacturing process description will consist of:
- Major process steps
- Simplified, schematic flow diagram & key equipment
- Important safety or environmental considerations
- Economic perspective, comprising capital expenditures and/or operating expenses
All content from Intratec's Chemical Process Library was produced based on reports published by Intratec. To learn more about Urea production processes presented below and others examined in Intratec reports, click here.
Urea Manufacture from NH3 via a Self-Stripping Process
Urea is a nitrogenous com pound consisting of a car bonyl group attached to two amine groups. Urea plays an important role in many biological processes, but is also an important material in synthesis (for example, resins and plastics), as well as in fertilizers and animal feed.
The process described is similar to Saipem’s (formerly Snamprogetti) self stripping process, based on formation of ammonium carbamate from liquid NH3 and gaseous CO2, followed by dehydration of the ammonium carbamate to urea. The figure below presents a simplified flow diagram of this process.
The reactor effluent, containing carbamate, is fed to a falling film stripper ...
The urea solution is directed to two successive decomposers for the removal of residual carbamate and CO2. After decomposition ...
At this point, the urea-water mixture is concentrated in a two-stage evaporator, ...
Here, the urea melt is sprayed at the top of a prilling tower ...
Urea production pathways
Urea was first produced in 1828 from ammonia and cyanic acid in aqueous solution. Modern commercial ...
The total operating cost (raw materials, utilities, fixed costs and depreciation costs) estimated ...