Method for improving rheological properties of kaolin clays

Details Method for improving rheological properties of kaolin clays Method for improving rheological properties of kaolin clays

1992-04-28

1994-07-26

Lithgow, Thomas M.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209 8, 209 39, 209214, 209232, 501146, 106486, 423113, B03B 104, B03B 700, B03C 102

Patent

active

053324935

ABSTRACT:
A method for beneficiating a kaolin clay which includes quantities of smectite contaminants to reduce the low and high shear viscosities of high solids aqueous slurries of the kaolin. The smectite is converted into a pillared clay by intercalating it with a polymeric cationic hydroxy metal complex wherein the metal is ferromagnetic or diamagnetic. The kaolin and pillared smectite is then subjected as an aqueous slurry to high intensity magnetic separation, to separate the pillared smectite, and the beneficiated kaolin is recovered as product.

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