Maintaining molten salt electrolyte concentration in aluminum-producing electrolytic cell
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United States of America Patent
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Jan 4, 2005
Grant Date -
Jul 31, 2003
app pub date -
Jan 25, 2002
filing date -
Jan 25, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of maintaining molten salt concentration in a low temperature electrolytic cell used for production of aluminum from alumina dissolved in a molten salt electrolyte contained in a cell free of frozen crust wherein volatile material is vented from the cell and contacted and captured on alumina being added to the cell. The captured volatile material is returned with alumina to cell to maintain the concentration of the molten salt.
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