Cationically process calcined kaolin clay

Details Cationically process calcined kaolin clay Cationically process calcined kaolin clay

C - Chemistry, Metallurgy

04

B

261/44

C04B 33/04 (2006.01) B03B 1/04 (2006.01) C09C 1/42 (2006.01) C09C 3/04 (2006.01)

Patent

CA 2013623

Abstract of the Disclosure 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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