Method for separating mixture of finely divided minerals
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United States of America Patent
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Aug 24, 2010
Grant Date -
Aug 24, 2006
app pub date -
Feb 8, 2006
filing date -
Feb 23, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
content of at least about 1.0% by weight, and optionally comprises titania in an amount of at least about 1.5% by weight. Also disclosed herein are methods of refining the hard kaolins, such as RCC hard kaolins, by dispersing the kaolin with at least one anionic organic dispersant and at least one inorganic dispersant. Also disclosed are compositions comprising an aqueous kaolin slurry comprising the hard kaolin, such as an RCC hard kaolin, at least one anionic organic dispersant, and at least one inorganic dispersant. Also disclosed are products containing the refined kaolin, such as paints, paper coatings, and plastics.
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