USA Spray drying method for preparing kaolin as a ...
Composite white pigments composed of titanium dioxide (TiO 2 ) and kaolin are prepared by subjecting kaolin slurry to spray drying with injected gas to promote droplet fluffing and fragmentation. The slurry contains a hydrocolloid suspending agent and a cationic reagent for making the kaolin particles cationic. The frangible dry material thus produced can be blended with TiO 2 particles to ...