Method for producing solar cell-grade silicon from rice hulls

Details Method for producing solar cell-grade silicon from rice hulls Method for producing solar cell-grade silicon from rice hulls

C - Chemistry, Metallurgy

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B

23/325

C01B 33/02 (2006.01) C01B 33/025 (2006.01) C30B 25/00 (2006.01) H01L 21/04 (2006.01)

Patent

CA 1118582

U.S. 23,300 ABSTRACT OF THE DISCLOSURE A method for producing silicon from rice hull comprises leaching the rice hulls in acid followed by treatment with high purity water, coking the acid cleaned hulls in a non-oxidizing ambient, compensating the carbon to silica ratio and reducing the silica to form high purity silicon.

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