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UAN solution

Uhde offers its competence and experience for customers ranging from process studies up to the execution of projects on an EPC basis.

State-of-the-art technology for the production of urea ammonium nitrate solution (UAN) can be provided.

Uhde has designed UAN plants operating up to a capacity of 4,300 mtpd in a single line. Today, Uhde is the leading licensor for UAN processes.

UAN is a liquid fertilizer with excellent physical properties. It is produced as a mixture of ammonium nitrate, urea and water. Standard solutions contain 28%, 30% or 32% nitrogen, but UAN can also be enriched with soluble plant nutrients, like sulfur, boron and calcium compounds.

The UAN solution can easily be applied by spraying, without the need for additional irrigation.

Uhde offers two processes for UAN production:

a) Neutralization of ammonia gas:

In a special UAN mixing unit, urea solution and water are mixed with the AN solution coming from the ammonium nitrate neutralization plant for the required nitrogen content.

b) Neutralization of urea off-gas:

When implementing a once-through urea synthesis, the ammonia-rich off-gas can be used as feedstock for the ammonium nitrate neutralization and the weak urea solution will be used for the UAN mixing.

The Uhde® UAN processes are known for their:

  • high reliability and high on-stream time

  • references between 400 and 4300 mtpd

  • excellent safety standards by process principle, design and control

  • easy start-up and shut-down

  • energy efficiency

  • emissions: wet scrubbing system of an offgas neutralization meets environmental regulations and BAT levels

  • cost-effectiveness

All above processes are referenced and well proven.

Are you curious? Get in contact with us!

UAN off-gas vent scrubber
UAN plant for CF Industries Inc. in Louisiana, USA