Method for removing magnesium from aluminum-magnesium alloys with engineered scavenger compound
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United States of America Patent
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Mar 19, 1996
Grant Date -
N/A
app pub date -
Oct 3, 1994
filing date -
Oct 3, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process of recovering magnesium from an aluminum-magnesium alloy using a two electrode cell, comprising: placing an engineered scavenger compound in an electrode basket of a two electrode cell; adjusting the temperature of a surrounding heating furnace to a temperature below at the melting point of an Al--Mg alloy under a salt bath in a crucible disposed in the cell; immersing the electrode basket containing the engineered scavenger compound into a molten salt bath and making an electrical connection between the crucible and the electrode basket until the engineered scavenger compound is charged with Mg to a point sufficient to cause cessation of voltage and current flow; and making an electrical connection between the basket electrode containing the engineered scavenger compound and Mg and a stainless steel rod electrode disposed within the molten salt bath, and applying a current through a DC voltage sufficient to cause captured Mg to leave the engineered scavenger compound and become electrodeposited on the stainless steel rod.
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