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BIOGENIC SILICA AS A RAW MATERIAL TO CREATE HIGH PURITY SILICON

United States Patent Application

20150110701
A1
View the Complete Application at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
A low cost process is provided for creating high purity silicon from agricultural waste, particularly rice hull ash. The process uses a series of chemical and thermal steps to yield high purity silica while using less energy and more efficient chemical processes. The high purity silicon features fewer impurities that negatively affect the use of high purity for PV cells and reduces capital and operating costs of processes to yield ultra-pure silicon.
Laine, Richard M. (Ann Arbor, MI), Marchal, Julien C. (Ann Arbor, MI)
Wadham Energy LP, Mayaterials, Inc.
14/ 519,051
October 20, 2014
[0002] This invention was made with Government support under Department of Energy Solar America Contract No. DE-FG36-08GO18009. The government has certain rights in this invention.