Process for making urea prills and urea prills obtained by...

Details Process for making urea prills and urea prills obtained by... Process for making urea prills and urea prills obtained by...

C - Chemistry, Metallurgy

05

C

260/557.7

C05C 9/00 (2006.01) B01J 2/04 (2006.01)

Patent

CA 1192223

METHOD FOR MAKING UREA PRILLS AND UREA PRILLS OBTAINED BY APPLYING THIS METHOD Abstract of the Disclosure A method for producing urea prills by passing molten droplets of substantially water free urea downwardly through a cooling zone countercur- rent to a cooling gas. A dispersion of crystalline particles is maintained in at least a portion of the cooling zone, the crystalline particles having average dimensions of between 2 and 10 microns and being dispersed in the cooling gas in a quantity of between about 8 and 25 mg per m3 of the cooling gas at ambient temperature and pressure, whereby urea prills, built up of relatively small crystallites with random orientation having improved impact strength are formed.

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