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Low cost routes to high purity silicon and derivatives thereof

United States Patent

July 2, 2013
View the Complete Patent at the US Patent & Trademark Office
The present invention is directed to a method for providing an agricultural waste product having amorphous silica, carbon, and impurities; extracting from the agricultural waste product an amount of the impurities; changing the ratio of carbon to silica; and reducing the silica to a high purity silicon (e.g., to photovoltaic silicon).
Laine; Richard M. (Ann Arbor, MI), Krug; David James (Ann Arbor, MI), Marchal; Julien Claudius (Ann Arbor, MI), Mccolm; Andrew Stewart (Ann Arbor, MI)
Mayaterials, Inc. (Ann Arbor, MI)
13/ 057,058
August 6, 2009
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The invention was made in part with Government support under National Science Foundation Award No. IIP-0740215 and under the U.S. Department of Energy Contract No. DE-FG36-08G018009. The Government has certain rights to the invention.