Process for urea granulation
AssigneeCompagnie Neerlandaise de l'Azote
InventorsAnton Niks, Willy H. P. Van Hijfte, Rafael A. J. Goethals
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Abstract
Urea granules are prepared by spraying an aqueous urea solution having a urea concentration of 70-99.9% by weight on to fluidized urea nuclei in the form of droplets having a mean drop diameter of 20-120 .mu.m at a temperature at which the water is evaporated from the solution sprayed on to the nuclei and urea crystallizes on the nuclei to form granules having a desired size.
Claims11
A process for producing urea granules, characterized by spraying an aqueous solution consisting essentially of urea having a urea concentration of 70-99.9% by weight onto fluidized urea nuclei in the form of droplets having a mean drop diameter of 20-120 .mu.m at a temperature at which the water is evaporated from the solution sprayed onto the nuclei, and urea crystallizes on the nuclei, to form granules having a desired size.
Dependencies are inferred from the claim text.