Kaolin clays which are conditioned prior to removing impurities

Details Kaolin clays which are conditioned prior to removing impurities Kaolin clays which are conditioned prior to removing impurities

1997-11-10

1999-12-28

Marcheschi, Michael

Compositions: coating or plastic

Materials or ingredients

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

501147, 501148, 252 61, 209164, 209166, C04B 1410, C04B 3304, C04B 3310

Patent

active

060076186

ABSTRACT:
Kaolin clays are conditioned for the removal of colored titaniferous impurities by (A) first mixing the kaolin clay with a collector to condition the impurities, in the absence of a dispersant, but in the presence of sufficient water to yield a mixture having a solids content of at least 65 percent by weight and (B) then deflocculating the kaolin clay mixture at a pH of at least 4.0 with a dispersant in amounts sufficient to yield a kaolin clay slurry which is suitable for subsequent processing to remove colored titaniferous impurities.

REFERENCES:
patent: 3410399 (1968-11-01), Hunter
patent: 3450257 (1969-06-01), Cundy
patent: 4483624 (1984-11-01), Bacon et al.
patent: 4492628 (1985-01-01), Young et al.
patent: 4629556 (1986-12-01), Yoon et al.
patent: 4871466 (1989-10-01), Wang et al.
patent: 4929343 (1990-05-01), Wang et al.
patent: 5223463 (1993-06-01), Bilimoria et al.
patent: 5358120 (1994-10-01), Gantt et al.

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