A method for producing basic products from ash, which includes the provision of a starting material in particle form, crushing the particles of the starting material by high-frequency pressure impulses and the in situ separation of at least two fractions with different average particle sizes, where the energy-efficient production of a basic product with a defined particle size and high reactivity is effected, such that the produced basic products can be used directly for further product production, e.g. as alkalizing agent, for ground stabilization or as filler.

The invention relates to precipitated silica, characterized by BET: 150 m.sup.2/g-400 m.sup.2/g, preferably 200 m.sup.2/g-300 m.sup.2/g, determined to ISO 9277 DOA: 220 ml/100 g-400 ml/100 g, preferably 250 ml/100 g-350 ml/100 g, determined to ISO 19246 d.sub.50: 3.0 ?m-5.0 ?m, determined by laser diffraction on a Coulter LS to ISO 13320, particle size ratio d.sub.5:d.sub.50:d.sub.95: >0.3:1:<2, particle size distribution d.sub.95?d.sub.5/d.sub.50: between 1.3 and 1.7.

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.

The invention provides metal oxide particles surface-treated with at least one alkoxysilane compound, methods of making such, and toners comprising same.

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.

Suspensions of silica particles in organic liquids are disclosed as well as a method for their preparation.

Suspensions of silica particles in organic liquids are disclosed as well as a method for their preparation.

This invention relates to a defoamer active. The defoamer active may include hydrophobized silica particles obtained by treating silica particles with a hydrophobilizing agent. The silica particles may have a BET surface of less than about 150 m.sup.2/g, a surface pH of at least about 10, and a median particle size ranging from about 2 m to about 50 m. The carbon content of the hydrophobized silica particles may not be more than 3%.

A cristobalite includes: a d50 particle size selected within a range of from 1 m to 15 m; an L color coordinate of greater than 96; a color coordinate of less than 1; and a b color coordinate of 1 or less, in which the cristobalite is a powder. Also provided are compositions containing the cristobalite, coatings formed with compositions, and methods of preparing cristobalite.

Provided is a silica that exhibits a high matting property when utilized as a matting agent for a paint, and can also suppress the occurrence of cloudiness. The silica has an aggregated structure in which primary particles are aggregated, has a particle diameter ratio R represented by the following equation (1) of from 4.3 to 5.2, has an absorbance of 0.6 or less for light having a wavelength of 700 nm as an aqueous dispersion having a concentration of 1.48 mass %, and has a particle density measured with a He pycnometer of 2.18 g/cm.sup.3 or more: Equation (1) R=.sup.LD50/.sup.CD50 (in the equation (1), .sup.LD50 represents a volume-based 50% cumulative particle diameter (m) of the silica measured based on a laser diffraction/scattering method, and .sup.CD50 represents a volume-based 50% cumulative particle diameter (m) of the silica measured based on a Coulter counter method).