Method of producing an intermediate of silicon dioxide...

Details Method of producing an intermediate of silicon dioxide... Method of producing an intermediate of silicon dioxide...

B - Operations, Transporting

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B01J 13/02 (2006.01) C01B 31/36 (2006.01) C01B 33/025 (2006.01) C08K 7/00 (2006.01) C08K 9/10 (2006.01) C09C 3/00 (2006.01)

Patent

CA 1156520

ABSTRACT OF THE DISCLOSURE A method of preparing an intermediate composition for the production of silicon or silicon carbide, wherein sili- con dioxide particles (quartz sand) are coated with carbonaceous material in a fluidized bed from which the coated particles are extracted as they fall to the bottom of the fluidized bed by vir- tue of an increase in mess by the coating process. The carbon in the coating should be stoichiometrically equivalent to that required for the ultimate reaction of the silicon dioxide to form either elemental silicon or silicon carbide.

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