Modified kaolin compositions and methods for making same

Details Modified kaolin compositions and methods for making same Modified kaolin compositions and methods for making same

2008-06-24

2008-06-24

Lorengo, J. A. (Department: 1793)

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

C106S492000, C502S080000

Reexamination Certificate

active

07390358

ABSTRACT:
A method for preparing a modified kaolin clay, includes the steps of providing a kaolin clay material having a starting ratio of silica to alumina; mixing the kaolin clay material with acid so as to form a substantially homogenous paste; calcining the paste so as to provide a calcined acid-treated clay material; mixing the calcined acid-treated clay material in water so as to form a suspension; precipitating aluminum from the suspension so as to produce a reduced aluminum suspension; and obtaining a modified clay material from the reduced aluminum suspension, wherein the modified clay material has a final ratio of silica to alumina which is higher than the starting ratio.

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