Process for the microwave beneficiation of discolored kaolin clay materials
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United States of America Patent
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Nov 3, 1998
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app pub date -
Apr 23, 1997
filing date -
Apr 23, 1997
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Abstract
Kaolin clay materials containing discoloring impurities can be beneficiated by microwave irradiation in the presence of water and a polyprotic acid component to produce a beneficiated kaolin clay material having improved color and brightness.
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