J.m. Huber Corporation

Bobby R Skipper

Albert C Kunkle

Robert E Hardy

Nathan Millman

Robert N Maynard

A low brightness pigment and method is provided from a heretofore rejected waste kaolin stream. Kaolin processing rejects are high in iron-stained TiO.sub.2. After separating the stained TiO.sub.2 from the high brightness kaolin and concentrating the resulting fraction, the material can be processed to produce a low brightness pigment suitable of many applications where lower brightness is desirable, such as coating paper board without mottling.

Low brightness functional pigment from process by-product

Structured pigment from high TiO.sub.2 /Fe.sub.2 O.sub.3 kaolinite

A method of beneficiating kaolin clay by the addition of non-dispersing neutral salts to assist in the removal of discolored impurities, such as titanium and iron bearing minerals from a clay slurry. This process is capable of producing clays having a brightness in the 90- 95 range.

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Cochran, GA, United States of America

Bobby R Skipper