Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition – Control element is fluid pressure sensitive
Reexamination Certificate
2011-07-05
2011-07-05
Griffin, Walter D (Department: 1774)
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
Control element is fluid pressure sensitive
C422S129000, C422S139000, C422S140000, C422S142000, C422S143000, C422S145000, C423S348000, C423S349000
Reexamination Certificate
active
07972562
ABSTRACT:
The present invention relates to a high-pressure fluidized bed reactor for preparing granular polycrystalline silicon, comprising (a) a reactor tube, (b) a reactor shell encompassing the reactor tube, (c) an inner zone formed within the reactor tube, where a silicon particle bed is formed and silicon deposition occurs, and an outer zone formed in between the reactor shell and the reactor tube, which is maintained under the inert gas atmosphere, and (d) a controlling means to keep the difference between pressures in the inner zone and the outer zone being maintained within the range of 0 to 1 bar, thereby enabling to maintain physical stability of the reactor tube and efficiently prepare granular polycrystalline silicon even at relatively high reaction pressure.
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Choi Won Choon
Kim Hee Young
Park Yong Ki
Yoon Kyung Koo
Frommer & Lawrence & Haug LLP
Griffin Walter D
Korea Research Institute of Chemical Technology
Santucci Ronald R.
Young Natasha
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