New trend-Process For Producing Free-Flowing Granules With Superheated Stream(11)
Known charged carrier beads of the type in question are generally characterized in that the
useful material introduced is predominantly or completely deposited on the outside of the
carrier beads, i.e. on the surface thereof. Sufficiently coherent porous granules of fine-particle insoluble solids can thus be particularly suitable carrier bead materials for hitherto
known methods. Through granulation of the insoluble fine particles, they provide a large-surface carrier material which is accessible to coating with a liquid composition and/or with
a composition applied in free-flowing form.
Hitherto, it was not regarded as possible to use useful materials of the type in question
solid at room temperature as carrier beads for absorbing other useful materials for detergents
and cleaning products of which a substantial percentage, for example well above one third
of the carrier beads as a whole or even the predominant part of the carrier beads, is formed
by surface-active useful materials. The basis here is the knowledge of the poor solubility and
tendency towards gelation of highly concentrated surfactant mixtures solid at room
temperature on introduction into aqueous phases. The teaching according to the invention
builds on the surprising observation that dry mixtures of useful materials of the type
according to the invention obtained by drying in superheated steam differ distinctly in
their behavior from the same mixtures of useful materials 5 conventionally dried with hot
gases.
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