Process and apparatus for obtaining silicon from fluosilicic aci

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

1982-12-27

1986-04-22

Richman, Barry S.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including specific material of construction

23308R, 75 844, 266227, 422199, 422240, 423349, 423350, B01J 1202, C01B 3302

Patent

active

045841810

ABSTRACT:
An apparatus for producing low cost, high purity solar grade Si wherein a reduction reaction, preferably the reduction of SiF.sub.4, by an alkali metal (Na preferred) is carried out inside a reaction chamber. The chamber wall and bottom surfaces are formed of graphite and configured with drainage channels 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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