Method for producing high opacifying kaolin pigment

Details Method for producing high opacifying kaolin pigment Method for producing high opacifying kaolin pigment

1990-11-30

1992-08-11

Dixon, Jr., William R.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106442, 106446, 501145, 501147, C04B 3300, C09C 136

Patent

active

051375745

ABSTRACT:
A method of producing a high opacifying kaolin pigment by separating from one or more iron-stained titania-containing crude kaolins having a titania content of from about 1 to 2 weight percent, one or more titania-enriched kaolin fractions which contain the titania in an amount of above 2 weight percent; subjecting the fraction(s) to media grinding; dewatering and drying the media ground fraction(s); blending the fraction(s) with a fine particle size unground kaolin having a titania content less than 2%, in proportions to provide a calciner feed having at least 2% titania; and calcining the feed at a temperature in the range of 1500.degree. to 2200.degree. F.

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patent: 4028173 (1977-06-01), Olson
patent: 4098688 (1978-07-01), Nott
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patent: 4518491 (1985-05-01), Bilimoria et al.
patent: 4678517 (1987-07-01), Dunaway
patent: 5047375 (1991-09-01), Dunaway et al.

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