Method for the production of a magnesium chloride solution
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United States of America Patent
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Nov 9, 1999
Grant Date -
N/A
app pub date -
Sep 23, 1998
filing date -
Sep 23, 1998
priority date (Note) -
Expired
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Abstract
The present invention is concerned with a method for the extraction of magnesium from magnesium-containing materials such as magnesite, dolomite and silicates materials like serpentine residues, products from the amphibole or pyroxene group. The magnesium-containing material is first leached in at least one leaching reactor, and subsequently submitted to a series of neutralizing steps in separate reactors under controlled pH and oxydo-reduction potentials. The slurry produced is filtered to produce a substantially pure magnesium chloride solution containing less than 1 ppm of each contaminant present therein.
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