Method for producing high opacifying kaolin pigment

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

C - Chemistry, Metallurgy

09

C

C09C 1/36 (2006.01) C09C 1/42 (2006.01)

Patent

CA 2097328

2097328 9209662 PCTABS00013 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· to 2200 ·F.

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