Process for making granules containing urea as the main componen

Details Process for making granules containing urea as the main componen Process for making granules containing urea as the main componen

1982-06-30

1984-10-23

Lander, Ferris H.

Chemistry: fertilizers

Processes and products

Organic material-containing

71 30, 427182, 427213, C05G 300, C05C 900

Patent

active

044786328

ABSTRACT:
A process for making granules containing urea as the main component by spraying an aqueous urea solution having a urea concentration of 85-98% by weight, to which solution magnesium hydroxide, an inorganic magnesium salt or a mixture of such substances has been added as a crystallization retarder for the urea, and which solution optionally contains one or more other fertilizers in solution and/or suspension, is sprayed in the form of very fine droplets having an average diameter of between 20 and 120 micron into a fluidized bed of urea particles at a temperature at which the water on the solutions sprayed onto the particles is evaporated, and urea or urea containing material solidifies on the particles, to form granules having a desired size. The urea granules thus produced are compatible with single and triple superphosphate granules.

REFERENCES:
patent: 4219589 (1980-08-01), Niks et al.
Derwent, Abstract 17560-Wolf, 12/10/80.

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