Method and device for manufacturing extremely fine particles...

Details Method and device for manufacturing extremely fine particles... Method and device for manufacturing extremely fine particles...

2009-04-01

2010-06-29

Theisen, Mary Lynn F (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

By extrusion spraying or gravity fall through orifice

C159S048100

Reexamination Certificate

active

07744786

ABSTRACT:
A method and device for manufacturing extremely fine particles and porous materials by controlled low temperature drying. An ambient-pressure and ambient-temperature atomizer atomizes a particle precursor solution to create a precursor mist. The precursor mist and dryer gas are fed into a dryer tube through a tangential inlet (swirl generating inlet). The mixed stream forms a helical flow structure within the dryer tube. The swirling mist undergoes drying and particle formation at a relatively low temperature. The flow continues to swirl and drying process continues with repeated passes until the required drying duration is reached. This dryer structure allows for a compact dryer with full control of residence time.

REFERENCES:
patent: 2005/0031692 (2005-02-01), Beyerinck et al.

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