Process for urea granulation

Details Process for urea granulation Process for urea granulation

1978-05-22

1980-08-26

Smith, John D.

Coating processes

Particles, flakes, or granules coated or encapsulated

Solid encapsulation process utilizing an emulsion or...

71 28, 71 64DB, 159 45, 159 47UA, 159DIG3, 159DIG21, 260707, 4273741, B05D 112, B05D 302

Patent

active

042195896

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.

REFERENCES:
patent: 2561392 (1951-07-01), Marshall
patent: 2919184 (1959-12-01), Osswald et al.
patent: 3117020 (1964-01-01), Fabris et al.
patent: 3124612 (1964-03-01), Cook
patent: 3477842 (1969-11-01), Cook et al.
patent: 3908045 (1975-09-01), Alterman et al.
patent: 4026864 (1977-05-01), Diethelm et al.
patent: 4071304 (1978-01-01), Chauvin et al.

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