LOW ABRASION CALCINED KAOLIN PIGMENTS AND ENHANCED

专利名称：LOW ABRASION CALCINED KAOLIN

PIGMENTS AND ENHANCED FILTRATIONMETHOD

发明人：WU, Joseph, H., Z.,LONDO, Michael,

G.,WILLIS, Mitchell, J.,GUERMONPREZ, Rene,S.,BURBANK, Tracey, A.

申请号：EP99919922.7申请日：19990420公开号：EP1090075A2公开日：20010411

摘要：A method for reducing the abrasion of a silica-containing calcined kaolinpigment by the controlled leaching of silica from the pigment, preferably by the use of acaustic solution to dissolve the silica out of the calcined kaolin. In another aspect of theinvention, the brightness, opacity, or both of a calcined kaolin is increased by increasingthe fineness of the kaolin feed supplied to the calciner. The combination of thesemethods results in the production of a calcined kaolin with low abrasion and high

brightness and opacity. Another aspect of the invention concerns an improved method offiltration of dilatent materials such as the leached calcined clay.

申请人：Engelhard Corporation

地址：101 Wood Avenue,P.O. Box 770 Iselin, NJ 08830-0770 US

国籍：US

代理机构：Fisher, Adrian John

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