CALCIUM CARBONATE SOIL AMENDMENT AND INDUSTRIAL FILLER DERIVED FROM CARPET BACKING
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United States of America Patent
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Issued Date -
Dec 10, 2009
app pub date -
Jun 5, 2008
filing date -
Jun 5, 2008
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Abstract
The calcium carbonate component of waste carpet is concentrated by mechanical means and/or chemical means then subjected to a heat treatment at a temperature below the decomposition temperature of calcium carbonate to volatilize or modify organic compounds admixed with calcium carbonate so as to yield a free-flowing particulate filler composed of at least about 70% calcium carbonate.
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