Reduced Crystalline Silica Diatomaceous Earth Products and Methods of Manufacturing the Same
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United States of America Patent
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Issued Date -
Mar 3, 2016
app pub date -
Apr 11, 2013
filing date -
Apr 11, 2013
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Abandoned
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Abstract
Diatomaceous earth products with reduced amounts of cristobalite and higher Y values are disclosed. The diatomaceous earth products are prepared in a conventional manner to produce a flux-calcine diatomaceous earth. The flux-calcine diatomaceous earth is mixed with potassium hydroxide and the mixture is then heated. The combination of the potassium hydroxide and post-calcining heat treatment results in a diatomaceous earth product with reduced amounts of cristobalite and a whiter, brighter appearance.
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