Method of removing fluoride from quicklime and hydrated lime
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United States of America Patent
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N/A
Issued Date -
May 10, 2007
app pub date -
Nov 9, 2005
filing date -
Nov 9, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method is shown for producing food grade quicklime and hydrated lime. Raw limestone feed stock is calcined in a kiln to produce quicklime which is then slaked to produce hydrated lime product. The present invention involves the discovery that, by increasing the calcination temperature a selected amount, the concentration of fluoride in the quicklime can be dramatically reduced to a level below what is required for food grade quicklime and hydrated lime.
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