Electrochemical processing of solid materials in fused salt
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United States of America Patent
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Feb 1, 2011
Grant Date -
Apr 27, 2006
app pub date -
Dec 2, 2002
filing date -
Dec 1, 2001
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Abstract
The subject invention pertains to methods for processing a solid material (M.sup.1X) comprising a solid solution of a non-metal species (X) in a metal or semi-metal (M.sup.1) or a compound between the non-metal species and the metal or semi-metal is immersed in a molten salt (M.sup.2Y). A cathodic potential is applied to the material to remove a portion of the non-metal species by electro-deoxidation. To remove the non-metal species at lower concentrations, a source of a reactive metal (M.sup.3) is immersed in the molten salt and is electronically connected to the material. Reactions occur at the material, where the non-metal species dissolves in the salt, and at the reactive metal, which reacts with the non-metal species dissolved in the salt to form a reaction product more stable than a compound between the non-metal species and the metal or semi-metal (M.sup.1). The non-metal species is thus removed from the solid material.
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