Process for the preparation of granules

Details Process for the preparation of granules Process for the preparation of granules

1984-08-21

1987-10-20

Bashore, S. Leon

Coating processes

Particles, flakes, or granules coated or encapsulated

Solid encapsulation process utilizing an emulsion or...

71 6406, 239 9, 239400, 239403, 239424, 159 406, 159 431, 159 472, 159 481, 159DIG3, 159DIG21, 159DIG38, 261 781, B05D 102

Patent

active

047013532

ABSTRACT:
Preparation of granules by making nuclei grow, in a fluidized bed, by causing a liquid material to solidify thereon. The liquid material is sprayed in the bed upwards, with the aid of a spraying device provided with a central channel through which the liquid material is supplied, and a channel concentric therewith carrying a powerful gas stream, with the liquid material contacting the gas stream and being carried with the gas stream to a dilute zone where the growth of the nuclei takes place, which zone is created by the gas stream and is completely within the fluidized bed. The liquid material is made to come out of the central channel as a virtually closed, conical film, with a thrust exceeding the thrust of the gas stream, and this film is nebulized to very fine droplets with the aid of the gas stream.
In this process a very small amount of high-energetic gas is needed, while no agglomeration occurs in the bed.

REFERENCES:
patent: 3662960 (1972-05-01), Mitchell et al.
patent: 3831843 (1974-08-01), Masai
patent: 3979069 (1976-09-01), Garofalo
patent: 4217127 (1980-08-01), Kono et al.
patent: 4219589 (1980-08-01), Niks et al.
patent: 4221339 (1980-09-01), Yoshikawa
patent: 4456181 (1984-06-01), Burnham

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