A process is described for manufacturing white pigment containing products. The white pigment containing products are obtained from at least one white pigment and impurities containing material via froth flotation.

A process is described for manufacturing white pigment containing products. The white pigment containing products are obtained from at least one white pigment and impurities containing material via froth flotation.

A process is described for manufacturing white pigment containing products. The white pigment containing products are obtained from at least one white pigment and impurities containing material via froth flotation.

Calcined kaolin comprising a narrow particle size distribution and a fluxing agent are disclosed herein. In some examples, the calcined kaolin comprises particles, wherein 90% by weight or less of the particles have a diameter of less than 10 microns; 80% by weight or less of the particles have a diameter of less than 5 microns; 40% by weight or less of the particles have a diameter of less than 2 microns; and 20% by weight or less of the particles have a diameter of less than 1 micron. The calcined kaolin exhibits improved brightness, whiteness, particle size distribution, mullite index, and +325 mesh residue level compared to conventional calcined kaolin. Methods of making and using the calcined kaolin particles are also provided herein.

The present invention concerns the use of depolymerized carboxylated celluloses as a dispersing agent or grinding aid agent for aqueous suspensions of mineral materials, intended for paint formulations, plastic formulations, detergent formulations, cosmetic formulations, paper formulations or paper coating colors.

An anionic polymeric dispersant and a composition comprising inorganic particulate material and an anionic polymeric dispersant. A method of grinding a composition comprising inorganic particulate material and an anionic polymeric dispersant and a use of anionic polymeric dispersant to maintain the viscosity of a composition comprising inorganic particulate material.

The present invention relates to the use of copolymers obtained by polymerization of maleic anhydride and of styrene, for preparing particles of mineral matter having a weight-loss start temperature greater than or equal to 220 C., as measured by thermogravimetric analysis (TGA) between 150 C. and 600 C.

Composite pigments are provided which comprise a mineral pigment (such as kaolin clay, titanium dioxide, talc, mica or a mixture of two or more of these mineral pigments) and calcium carbonate precipitated in-situ on the surfaces of the particles of the mineral pigment.