Cationically processed calcined kaolin clay

Details Cationically processed calcined kaolin clay Cationically processed calcined kaolin clay

1991-05-23

1992-05-12

Morris, Theodore

Compositions: ceramic

Ceramic compositions

Clay containing

501142, 501145, 501153, 501154, 423118, 423328, 209 5, 106487, 106488, 1062865, 10628717, C04B 3324

Patent

active

051127822

ABSTRACT:
A method for producing a low abrasion calcined kaolin pigment which comprises forming an aqueous pulp of crude kaolin dispersing the pulp by adding thereto sufficient water-soluble organic cationic dispersant to impart a positive zeta potential to said particles and, preferably, an acidic pH to said pulp, removing coarse particles from said dispersed pulp and fractionating the dispersed pulp to separate a fine particle size fraction of mineral particles from coarser particles. The fine particle size fraction is dried, pulverized, calcined and repulverized.

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