CALCINED DIATOMITE PRODUCTS WITH LOW CRISTOBALITE CONTENT
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United States of America Patent
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app pub date -
Sep 5, 2013
filing date -
Nov 10, 2009
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Abstract
Described 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 described herein is a process for producing flux-calcined diatomite compositions including calcining a feed composition including 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 including at least one alkali metal.
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