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Introduction
The Stamicarbon partial-recycle CO2 stripping
urea process based on the Urea 2000plus™ concept is
eminently suitable for the manufacture of urea ammonium nitrate
(UAN) solutions.
The ratio of unconverted ammonia to urea is such that the
required ratio between urea and ammonium nitrate for the production
of UAN solutions can be achieved directly.
Ammonia still present in the stripped urea solution together
with the ammonia in the reactor off-gases is converted
into ammonium nitrate in a neutralization reactor, using nitric
acid.
UAN solution product is obtained by mixing the urea and ammonium
nitrate solutions. A commonly used nitrogen concentration
of 32% by weight can be realized in the process
sequence described. Document includes consumption figures and references.
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UREA 
