Fluidized bed for production of polycrystalline silicon

Details Fluidized bed for production of polycrystalline silicon Fluidized bed for production of polycrystalline silicon

C - Chemistry, Metallurgy

01

B

23/326, 23/389,

C01B 33/027 (2006.01) B01J 8/24 (2006.01) C01B 33/029 (2006.01) C01B 33/03 (2006.01) C30B 28/14 (2006.01) C30B 29/06 (2006.01)

Patent

CA 1336937

An improved fluidized bed reactor and a method for utilizing the fluidized bed reactor in the production of, for example, high purity polycrystalline silicon, by the pyrolysis of silane containing gas. The reactor being characterized by an entrainment zone located above a lower reaction zone. The entrainment zone having a cross- sectional area less than or equal to the cross-sectional area of the reaction zone and being capable of maintaining a fluidization gas velocity sufficient to entrain silicon powder particles, yet not sufficient to entrain silicon particles.

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