Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1993-04-06
1994-08-30
Green, Anthony
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106401, 106416, 501141, 501145, 501146, C04B 1404
Patent
active
053424433
ABSTRACT:
An improved method for improving the brightness of clay of the type that is capable of being bleached by an oxidative reagent such as Georgia gray kaolin. Such clay, in the form of a dispersed slurry, is treated with a combination of sodium silicate, sodium hypochlorite and ozone, most preferably followed by magnetic purification and a reduction bleach. Sodium hypochlorite is added shortly before ozonation.
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Forbus Ellen S.
Gantt George E.
Willis Mitchell J.
Young Raymond H.
Engelhard Corporation
Green Anthony
Marcheschi Michael
Moselle Inez L.
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