PRODUCTION OF SOLAR-GRADE SILICON FROM SILICON DIOXIDE
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United States of America Patent
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Issued Date -
Oct 27, 2011
app pub date -
Sep 28, 2009
filing date -
Sep 30, 2008
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Abandoned
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Abstract
The invention relates to a complete method for producing pure silicon that is suitable for use as solar-grade silicon, comprising the reduction of a silicon oxide, purified by acidic precipitation from an aqueous solution of a silicon oxide dissolved in an aqueous phase, using one or more pure carbon sources, the purified silicon oxide being obtained, in particular, by the precipitation of a silicon oxide dissolved in an aqueous phase in an acidifier. The invention also relates to a formulation containing an activator and to a device for producing silicon, a reactor and electrodes.
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