Production of anhydrous magnesium chloride
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United States of America Patent
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Jan 1, 1991
Issued Date -
N/A
app pub date -
Aug 2, 1989
filing date -
Dec 13, 1988
priority date (Note) -
Expired
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Abstract
A process for the preparation of anhydrous magnesium chloride containing acceptable amounts of MgO suitable for use in the electrolytic production of magnesium metal comprises the steps of feeding spray-dried magnesium chloride powder, or a magnesite or magnesia powder to a furnace containing a molten magnesium chloride melt at a temperature of about 750.degree.-850.degree. C., and reacting the melt with a carbonaceous reductant and chlorine. The gases are introduced using a gas disperser consisting of a rotating vaned impeller with a tube in the center of the impeller to create gas bubbles having a diameter smaller than 5 nm and having a gas hold-up as high as 30% of the original melt volume, and also ensure that the fine particles present in the melt are evenly suspended.
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