Production of dry powders of substances which are sensitive to o

Details Production of dry powders of substances which are sensitive to o Production of dry powders of substances which are sensitive to o

1982-08-30

1985-05-28

Lovering, Richard D.

Plastic and nonmetallic article shaping or treating: processes

Encapsulating normally liquid material

Liquid encapsulation utilizing an emulsion or dispersion to...

252522A, 424 35, 424 36, 424 37, 427213, 42721335, 514725, A61J 500, B01J 1302, B05D 700

Patent

active

045199612

ABSTRACT:
A process for pulverizing substances which are sensitive to oxidation, in particular oily substances, by dispersing oil-soluble substances, e.g. vitamins, carotinoids, pharmaceutically active compounds or aromas, in an aqueous solution of a film-forming colloid, which constitutes the continuous phase of the dispersion, with the addition of one or more substances from the group comprising the mono-, di- and polysaccharides, atomizing the dispersion, in a spray tower, in the presence of a spraying assistant and collecting the resulting particles in a fluidized bed, wherein, as the spraying auxiliary, a hydrophobic silica or a metal salt of a higher fatty acid is introduced above the fluidized bed and distributed uniformly in the spraying space, at a temperature at which the colloid of the atomized particles has not yet solidified, and the assistant-laden particles, colloid material of which essentially has not yet gelatinized, is collected in a fluidized bed, and dried therein in a conventional manner.

REFERENCES:
patent: 2756177 (1956-07-01), Cannalonga et al.
patent: 2897119 (1959-07-01), Dunn
patent: 3202731 (1965-08-01), Grevenstuk et al.
patent: 3445563 (1969-05-01), Clegg et al.
patent: 3499962 (1970-03-01), Wurzburg et al.
patent: 3890433 (1975-06-01), Oishi et al.
patent: 3962384 (1976-06-01), Cannalonga et al.
patent: 4262017 (1981-04-01), Kuipers et al.

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