Process for improving the brightness of fine-grained kaolin clay

Details Process for improving the brightness of fine-grained kaolin clay Process for improving the brightness of fine-grained kaolin clay

1997-06-05

1998-09-22

Lithgow, Thomas M.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209 121, 209 39, 209 17, 209 10, 501148, 501149, 106486, B03B 700, B03D 102, C09C 124

Patent

active

058109986

ABSTRACT:
Fine-grained kaolin clays having improved brightness can be produced by (a) using centrifugation to fractionate the clay starting material into finer and coarser fractions, (b) subjecting the coarser fraction to flotation to remove discoloring impurities and (c) combining the finer and floated coarser fractions to produce fine-grained kaolin clays having improved brightness.

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