Chemistry of inorganic compounds – Silicon or compound thereof – Elemental silicon
Patent
1995-02-15
2000-07-18
Griffin, Steven P.
Chemistry of inorganic compounds
Silicon or compound thereof
Elemental silicon
210771, C01B 33037
Patent
active
060903600
ABSTRACT:
A method for recovering particulate silicon essentially free of silicon containing compounds from a by-product stream containing metal salts and high-boiling silicon containing compounds having a boiling point higher than the sublimation temperature of the metal salts. The method comprises first separating the particulate silicon and other solids from the by-product stream by a method such as filtration. The particulates are then washed with a solvent having a boiling point lower than the sublimation temperature of the metal salt, thereby separating residual high-boiling silicon containing compound from the particulate silicon and other solids. The particulate silicon and other solids are then recovered in a dried form, essentially free of silicon containing compounds, by spray drying at a temperature lower than the sublimation temperature of the metal salt.
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Boley William F.
Dow Corning Corporation
Griffin Steven P.
Hendrickson Stuart L.
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