Fluidity of slurries of kaolin clay using tetraalkylammonium compounds
AssigneeEngelhard Corporation
InventorsJordan K. Lampert, Richard A. Slepetys, Thomas Dombrowski
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Abstract
The present invention relates to a process for reducing the inherent low shear viscosity of kaolin clays contaminated with expandable layer minerals. A water soluble tetraalkyl ammonium compound is contacted with the clay during conventional wet processing.
Claims17
A process for treating kaolin clay comprising contacting an aqueous slurry of a kaolin clay with a water soluble quaternary alkyl ammonium compound, washing the kaolin clay, and recovering a washed kaolin clay product having reduced inherent low shear viscosity.
A process for reducing the low shear viscosity of kaolin clay contaminated with at least one impurity having an expandable lattice which comprises contacting an aqueous slurry of said kaolin clay with a tetraalkyl ammonium compound in which the cation has alkyl chain lengths of 8 carbon atoms or less, thereby forming a thickened slurry, dewatering said thickened slurry, washing the resulting dewatered clay and recovering the washed clay.
Kaolin clay prepared by intercalating contaminating expandable layer mineral with a quaternary ammonium cation.
Dependencies are inferred from the claim text.