Method and device for producing spherical particles from a...

Details Method and device for producing spherical particles from a... Method and device for producing spherical particles from a...

2007-04-24

2007-04-24

Theisen, Mary Lynn (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

By vibration or agitation

C264S014000, C425S006000

Reexamination Certificate

active

11085929

ABSTRACT:
The invention relates to a method and a device for the production of spherical particles, whereby a molten prepolymer or precondensate is transformed into droplets by means of a drip nozzle, the droplets are subjected to a countercurrent with a gas in a precipitation column until at least partial crystallization is achieved and are then subjected to an additional post-crystallization phase. In order to economically produce higher quality particles at a high flow rate, the molten prepolymer is transformed into droplets by means of a vibrating nozzle plate and/or direct vibration of the molten prepolymer or polymer and resulting droplets are subjected to an air and gas countercurrent.

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