Method for separating mixture of finely divided minerals and product thereof

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United States of America Patent

PATENT NO 6068693
SERIAL NO

08876523

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method of enhancing the brightness and increasing the yield of a kaolin clay by optimizing the removal of the titania and mica impurities in the clay and the amount of clay remaining in the slurry is disclosed. The method is a selective flocculation process wherein the clay is blunged, dispersed, and conditioned before flocculation. In the flocculation step, a high molecular weight anionic polymer and a low molecular weight anionic polymer, such as sodium polyacrylate, are added to the slurry after the conditioning process, whereby the titania-mica enriched flocs are separated from the suspension which is enriched with kaolin. This final kaolin product has titania levels ranging from 0.1% to 0.5%, a reduced mica level, a high usable product yield, and a brightness greater than 89.5 and at least 91.5.

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Patent Owner(s)

Patent OwnerAddress
ECC INTERNATIONAL INC5775 PEACHTREE-DUNWOODY RD N E ATLANTA GA 31082

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Archer, Dona L Sandersville, GA 2 14
Brown, H Vince Sandersville, GA 1 7
Garforth, William L Sandersville, GA 5 75
Garska, Michael J Sandersville, GA 17 156
Pruett, Robert J Milledgeville, GA 34 238
Yuan, Jun Milledgeville, GA 398 3892

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