Production of dispersions of spherical particles by crystallizat

Details Production of dispersions of spherical particles by crystallizat Production of dispersions of spherical particles by crystallizat

1991-12-02

1992-09-15

Straub, Gary P.

Chemistry: physical processes

Physical processes

23293A, 23295R, 585812, 422245, 366176, 239421, 423659, 502 8, D01H 518

Patent

active

051474123

ABSTRACT:
The invention relates to a process in which a melt is mixed with, and emulsified in a colder aqueous phase at a temperature below the crystallization point of the molten compound, the melt only solidifying in the form of the dispersed particles after the emulsification step. To this end, the melt is sprayed into the aqueous phase to form a preliminary emulsion (12) and the preliminary emulsion is finely dispersed for 0.005 s to 0.15 s in a following homogenization nozzle (8) to form an emulsion (15) which then solidifies to form the final crystal suspension. The particle size can be clearly and reproducibly adjusted through the nozzle pressure during the emulsification step. The process may be used in particular for the production of highly concentrated dispersions of high-melting organic materials.

REFERENCES:
patent: 1157092 (1915-10-01), du Rell
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patent: 4549813 (1985-10-01), Volz
patent: 4989988 (1991-02-01), Hutter et al.
patent: 4996004 (1991-02-01), Bucheler et al.
patent: 5011293 (1991-04-01), Roop et al.

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