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Urea Manufacture Technology Description

Online Urea Data: Manufacture, Uses and Applications

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.

Technology Description

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.

Urea Manufacture Technology - Process Flow Diagram

Stripping

The reactor effluent, containing carbamate, is fed to a falling film stripper ...

Carbamate decomposition

The urea solution is directed to two successive decomposers for the removal of residual carbamate and CO2. After decomposition ...

Urea concentration

At this point, the urea-water mixture is concentrated in a two-stage evaporator, ...

Finishing

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 ...

Economic Performance

The total operating cost (raw materials, utilities, fixed costs and depreciation costs) estimated ...

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This synopsis is based on the report Prilled Urea from Ammonia via Self-Stripping Process - Cost Analysis | Urea E11A. (For more information, Click here).