UAN solution

thyssenkrupp Industrial Solutions’ state-of-the-art technology for the production of urea ammonium nitrate solution (UAN).

UAN is a fertilizer with excellent physical properties. A mixture of ammonium nitrate, urea and water, standard solutions contain 28%, 30% and 32% nitrogen, but it can also be enriched with soluble plant nutrients, like sulfur, boron and calcium compounds. A typical composition of UAN solution with 32% N is

AN : urea : H2O = 45 : 35 : 20 %

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

thyssenkrupp Industrial Solutions has designed UAN plants in two process alternatives:

a) Neutralization of ammonia gas:

In a special UAN mixing unit, urea solution and water are mixed with the AN solution 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 to drive the ammonium nitrate neutralization.

thyssenkrupp Industrial Solutions offers licensed technology with projects ranging from basic engineering to execution on an EPC lump sum basis.

The Uhde ammonium nitrate neutralization process is known for its:

  • high reliability and high on-stream time
  • cost-effectiveness
  • excellent safety standards by process principle, design and control
  • energy efficiency
  • emissions: wet scrubbing system meets environmental regulations and BAT levels

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