Droplet forming apparatus for use in producing uniform particles

Plastic article or earthenware shaping or treating: apparatus – Means making particulate material directly from liquid or...

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264 9, B01J 202

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active

043021662

ABSTRACT:
Uniform particles are produced by introducing a laminar stream of a core liquid into a laminar flowing body of an immiscible sheath liquid. The core liquid or the sheath liquid, or both liquids, can contain one or more materials dispersed (dissolved or suspended) in them from which the uniform particles are formed. The two liquids and the dispersed material are expelled from a nozzle to form a liquid jet. The liquid jet is disturbed at a uniform, periodic rate to form liquid droplets which contain a uniform amount of the core liquid, the sheath liquid and the dispersed material. The droplets are collected and held in a catch liquid until the core and the sheath liquid in each droplet have diffused into the catch liquid leaving the uniform particles formed from the dispersed materials. There can be more than one sheath liquid which can also contain one or more materials dispersed in it.

REFERENCES:
patent: 2911672 (1959-11-01), Dorens et al.
patent: 3160686 (1964-12-01), Doyle et al.
patent: 3423489 (1969-01-01), Arens et al.

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