Method and apparatus for the classification of solid particles
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United States of America Patent
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Jun 1, 1999
Grant Date -
N/A
app pub date -
Feb 11, 1997
filing date -
May 27, 1994
priority date (Note) -
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Abstract
A method and apparatus for the classification of solid particles, in particular powdery catalytic components for the polymerization of olefins, which comprises sending solid particles suspended in a transporting gas flow through a screening device. Immediately upstream to the screening device there is an auxiliary fluidized bed classifier, in which the top of the bed is at the level of the lower part of the screening device.
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