Method for improving rheological properties of kaolin clays
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United States of America Patent
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Jul 26, 1994
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N/A
app pub date -
Apr 28, 1992
filing date -
Apr 28, 1992
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Expired
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Abstract
A method for beneficiating a kaolin clay which includes quantities of smectite contaminants to reduce the low and high shear viscosities of high solids aqueous slurries of the kaolin. The smectite is converted into a pillared clay by intercalating it with a polymeric cationic hydroxy metal complex wherein the metal is ferromagnetic or diamagnetic. The kaolin and pillared smectite is then subjected as an aqueous slurry to high intensity magnetic separation, to separate the pillared smectite, and the beneficiated kaolin is recovered as product.
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