Low brightness functional pigment from process by-product

Details Low brightness functional pigment from process by-product Low brightness functional pigment from process by-product

1992-04-27

1993-03-02

Dixon, Jr., William R.

Paper making and fiber liberation

Processes and products

With coating after drying

1621814, 1621815, 428454, 4285375, 106416, 106486, D21H 1768

Patent

active

051906155

ABSTRACT:
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.

REFERENCES:
patent: 4014705 (1977-03-01), Dykstra et al.
patent: 4971629 (1990-11-01), Dunaway et al.
patent: 5047375 (1991-09-01), Dunaway et al.

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