CALCINED DIATOMITE PRODUCTS WITH LOW CRISTOBALITE CONTENT
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United States of America Patent
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Issued Date -
May 27, 2010
app pub date -
Apr 17, 2008
filing date -
Apr 18, 2007
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Abstract
Disclosed herein is a flux calcined diatomite composition having a cristobalite content of less than about 5% by weight relative to the total weight of the flux calcined composition and a whiteness of greater than about 90. Also disclosed herein is a process for producing flux calcined diatomite compositions comprising calcining a feed composition comprising diatomite having an iron content of at least about 0.5% by weight relative to the total weight of the feed composition in the presence of at least one flux comprising at least one alkali metal.
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