Method for producing highly purified, granular silicium

Details Method for producing highly purified, granular silicium Method for producing highly purified, granular silicium

2006-02-21

2006-02-21

Cooke, Colleen P. (Department: 1754)

Chemistry of inorganic compounds

Silicon or compound thereof

Elemental silicon

C423S348000, C423S350000

Reexamination Certificate

active

07001579

ABSTRACT:
The invention relates to a method for producing granular silicon by thermal decomposition of a gas containing silicon in a fluidized bed, said decomposition occurring in the presence of free-flowing mobile elements. Preferably, said free-flowing mobile elements become devoid of silicon in a separate procedural step, said silicon being deposited during decomposition of gas containing silicon, by reacting with hydrogen halides, halogens, alkyl halogenides, aryl halogenides or combinations of halogen and/or hydrogen halide and/or oxidized mineral acids and/or by thermal treatment of said elements.

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patent: 32 22 153 (1983-12-01), None
patent: 3222153 (1983-12-01), None
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Translation of abstract only of DE 3222153 (single sheet), obtained through WEST.
Kyu Kyu Win et al., Apr. 1994, “Pressure Fluctuations in a Multi-Solid Fluidized Bed”, Journal of Chemical Engineering of Japan, Document is in English.
Gbordzoe, E. A. M. et al., Feb. 1988, “Gas Solid Contacting in a Two-Dimensional Fluidized Bed Containing Mobile Internals: Non-Reactive Tracer Studies”, Canadian Journal of Chemical Engineering, Document is in English.

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