Process and apparatus for obtaining silicon from fluosilicic...

Details Process and apparatus for obtaining silicon from fluosilicic... Process and apparatus for obtaining silicon from fluosilicic...

C - Chemistry, Metallurgy

01

B

23/326, 23/389

C01B 33/02 (2006.01) B01J 4/00 (2006.01) B01J 19/26 (2006.01) C01B 33/033 (2006.01)

Patent

CA 1221816

ABSTRACT OF THE INVENTION Process for producing low cost, high purity solar grade Si wherein a reduction reaction, preferably the reduction of SiF4, by alkali metal (Na preferred) is carried out inside a reaction chamber. The chamber wall and bottom surfaces are configured so as to facilitate the continuous separation of the products of reaction (Si and NaF) and removal of the molten salt by discharging the salt through one or more ports at the bottom of the reaction chamber. Such process is especially useful where it is desirable to discharge the reaction salt products from the reactor and retain silicon within the chamber for later removal.

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